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NPS  68-79-003 


NAVAL  POSTGRADUATE  SCHOOL 

Monterey,  California 


The 

Oceanographic 

Crui  se  of 

the 

USCGC 

GLACIER 

to 

the 

Marg  i  nal 

Sea- 

Ice  Zone  of 

th 

e  Chukchi  Sea  -- 

MIZPAC  78 

Robert  G. 

Paquette  and  Robert  H.  Bourke 

May  1979 

Interim  Repo 

rt  for  Period  Ju 

W 

1978  - 

May  1979 

Approved  for  public  release;  distribution  unlimited 

Prepared  for: 

Director,  Arctic  Submarine  Laboratory 

Naval  Ocean  Systems  Center 

c~  Diego,  CA  92152 


FEDDOCS 
D  208.14/2: 
NPS-68-79-003 

I 


DUDLEY  KNOX  LIBRARY  ^  * 

MtML  POSTGRADUATE  SCKXH  ^  S 

MONTEREY,  a  93940  §  % 


tm 


NAVAL  POSTGRADUATE  SCHOOL 
Monterey,  California 


Rear  Admiral  Tyler  F.  Dedman  Jack  R.  Borsting 

Superintendent  Provost 


The  work  reported  herein  was  supported  in  part  by  the  Arctic  Submarine 
Laboratory,  Naval  Ocean  Systems  Center,  San  Diego,  California  under  Project 
Order  Nos .  00002  and  00004. 

Reproduction  of  all  or  part  of  this  report  is  authorized. 


This  report  was  prepared  bv 


Unclassified 


SECURITY   CLASSIFICATION   OF    THIS  PAGE   ("When  Data  Entered) 


REPORT  DOCUMENTATION  PAGE 


READ  INSTRUCTIONS 
BEFORE  COMPLETING  FORM 


1.     REPORT   NUMBER 


NPS  68-79-003 


2.  GOVT   ACCESSION   NO. 


3.     RECIPIENT'S  CATALOG   NUMBER 


4.     TITLE  (and  Subtitle) 


The  Oceanographic  Cruise  of  the  U5CGC  GLACIER 
to  the  Marginal  Sea- Ice  Zone  of  the  Chukchi  Sea- 
Mi  ZPAC  78 


5.     TYPE  OF   REPORT  &   PERIOD  COVERED 

I  nter im 
!*♦  July  1978-2  May  1979 


6.  PERFORMING  ORG.  REPORT  NUMBER 


NPS  68-79-003 


7.  AUTHORC*; 

Robert  G.  Paquette  and  Robert  H.  Bourke 


8.     CONTRACT  OR  GRANT  NUMBERf*.) 
N6600W8-P0-00002 

N66001-79-P0-0000^ 


9.     PERFORMING  ORGANIZATION   NAME   AND  ADDRESS 

Naval  Postgraduate  School 
Monterey,  CA  939^0 


10.  PROGRAM  ELEMENT.  PROJECT,  TASK 
AREA  4  WORK  UNIT  NUMBERS 

Element:62758N;WorK:MR015't9A0M 

Project:    ZF52-555 

T*«;k-    7F^?-555-nni 


II.  CONTROLLING  OFFICE  NAME  AND  ADDRESS 

Arctic  Submarine  Laboratory 

Code  5^,  Bldg  371,  Naval  Ocean  System  Center 

San  Diego,  CA  92152 


12.  REPORT  DATE 

May  1979 


13.  NUMBER  OF  PAGES 


U.     MONITORING   AGENCY  NAME  6.    ADDRESSf//  different  from  Controlling  Office) 


tS.     SECURITY  CLASS,  (of  this  report) 
UNCLASS 


15a.     OECLASSIFI  CATION/ DOWN  GRADING 
SCHEDULE 


16.     DISTRIBUTION   STATEMENT  (of  this  Report) 

Approved  for  public  release;  distribution  unlimited. 


17.     DISTRIBUTION  STATEMENT  (of  the  abstract  entered  In  Block  20,  It  different  from  Report) 


18.     SUPPLEMENTARY  NOTES 


19.     KEY  WORDS  (Continue  on  reverse  aide  It  necessary  and  Identity  by  block  number) 

Marginal  Sea- Ice  Zone  Ml ZPAC 

Thermal  Fi nes tructure  CTD 

Chukchi  Sea  Salinity  Spiking 

Arctic  Ocean  Oceanography 


Fronts 

Mi  cros tructure 


20.     ABSTRACT  (Continue  on  reverse  side  It  necessary  and  Identity  by  block  number) 

This  report  presents  the  data  and  briefly  describes  the  oceanographic  results 
of  the  cruise  of  the  USCGC  GLACIER  to  the  marginal  sea-ice  zone  of  the 
Chukchi  Sea  during  the  period  l h    to  28  July  1978.   A  brief  analysis  is 
presented  which  shows  yearly  recurring  ice  bays  presumed  to  be  due  to 
bathymetric  steering  of  warm  currents.   The  relationship  of  upper  and  lower 
level  temperature  fronts  to  each  other  and  their  association  with  temperature 
f inestructure  is  described.   Plots  of  temperature,  salinity,  density  (a  ) 


DD     i  jan   73     1473  EDITION  OF    1  NOV  65  IS  OBSOLETE 

S/N    0102-014- 6601   | 

i 


Unclassified 


SECURITY  CLASSIFICATION  OF  THIS  PAGE  (When  Data  Entered) 


Unclassified 


„LCU**1TY   CLASSIFICATION   OF   THIS  PAGEfltTun  Data  Entered) 


and  sound  speed  are  presented  for  each  station.  A  detailed  discussion 
of  salinity  spike  removal  and  data  editing  routines  changed  since  the 
last  report  is  presented  in  Appendix  A. 


SECURITY  CLASSIFICATION  OF  THIS  PAGEfWhan  Data  Enfrod) 


TABLE  OF  CONTENTS 
List  of  Figures 


Page 


I.  INTRODUCTION  1 

I  I  .  GENERAL  DESCRIPTION  1 

III.  DATA  3 

IV.  RESULTS  3 

V.  REFERENCES  13 

APPENDIX  A.  DESPIKING  AND  DATA  EDITING 

APPENDIX  B.  EXPLANATION  OF  HEADING  CODES 

APPENDIX  C.  HEADING  DATA  FOR  MIZPAC  78  STAT! 

APPENDIX  D.  PROPERTY  PROFILES  FOR  MIZPAC  78 


)k 

ONS 
STATIONS 

19 

20 
29 

I  ! 


LIST  OF  FIGURES 

Page 

Figure  1.   Station  plot  of  MIZPAC  78.  k 

Figure  2A.  Computer-drawn,  expanded-scal e  station  plot  of  6 

MIZPAC  78. 

Figure  2B.  Computer-drawn,  expanded-scale  station  plot  of  7 

MIZPAC  78. 

Figure  3-   Temperature-salinity  cross-section  for  Crossing  No. 2.        8 

Figure  k.      Schematic  of  upper  level  currents  inferred  from  the  ice      9 
melt-back  pattern,  temperature  core  analysis,  and 
bottom  bathymetry. 

Figure  5.   Distribution  and  intensity  of  f i nes tructure  during  10 

MIZPAC  78. 

Figure  6.   Nested  profiles  of  temperature  from  Stations  *+l  12 

through  kS    illustrating  the  intense  f i nestructure 
found  within  the  center  of  the  western  embayment. 

Figure  7-   Property  profiles  from  four  MIZPAC  78  stations  16 

prior  to  editing  to  remove  noise  and  temperature 
induced  salinity  spikes. 

Figure  8.   Property  profiles  from  the  same  stations  in  Figure  7        17 
after  edi  ti  ng  . 


i  i  i 


THE  OCEANOGRAPHIC  CRUISE  OF  USCGC  GLACIER 
TO  THE  MARGINAL  SEA- ICE  ZONE  OF  THE  CHUKCHI  SEA 

MIZPAC  78 

by 

Robert  G.  Paquette  and  Robert  H.  Bourke 
Naval  Postgraduate  School,  Monterey,  CA  939^0 


I.   INTRODUCTION 

This  report  presents  the  data  and  briefly  describes  the  oceanoqraph i c 
results  of  the  cruise  of  USCGC  GLACIER  into  the  region  of  the  sea-ice  margin 
of  the  Chukchi  Sea  during  the  period  1 h   July  to  28  July  1978  as  part  of 
the  program  designated  MIZPAC  78.   The  primary  objective  of  the  cruise  was 
to  find  and  characterize  f inestructure  in  the  vertical  temperature  profiles 
and  to  discover  its  horizontal  distribution  and  causes.   This  is  the  sixth 
cruise  devoted  to  this  general  problem.   Other  cruises  in  1971,  1972,  and 
197^  were  reported  by  Paquette  and  Bourke  (1973,  1976),  1975  by  Zuberbuhler 
and  Roeder  (1976),  and  1977  by  Graham  (1978)  and  Paquette  and  Bourke  (1978). 
An  analysis  of  the  MIZPAC  78  data  has  been  performed  by  Small  (1979). 

I  I .   GENERAL  DISCUSSION 

The  scientific  group  boarded  GLACIER  at  Nome,  Alaska  by  helicopter 
on  ]h   July.   The  scientists  and  their  affiliations  were: 

Dr.  John  Newton,  Naval  Ocean  Systems  Center,  Chief  Scientist 

Dr.  Robert  G.  Paquette,  Naval  Postgraduate  School  (NPS) 

Dr.  Robert  H.  Bourke,  NPS 

LT  W.  R.  Lohrman,  USN,  Student  at  NPS 

LT  W.  E.  Small,  USN,  Student  at   NPS 

LT  P.  Pad  ilia,  Ecuadorian  Navy,  Student  at  NPS 

The  measurements  made  were  salinity  and  temperature  profiles  throughout 
the  entire  water  column  at  130  stations,  using  the  Applied  Physics  Laboratory- 
University  of  Washington  (APL-UW)  portable,  hand-lowered  CTD.   One  hundred 
and  six  stations  were  occupied  from  the  drifting  ship  while  2k    lowerings 
were  made  from  a  hovering  helicopter.   The  helicopter  lowerings  were  a  useful 
adjunct  as  they  could  be  used  to  extend  survey  lines  relatively  quickly. 
They  were  especially  useful  in  the  ice  where  reduced  icebreaker  speed  would 
have  caused  delays.   However,  the  helicopter  is  so  restricted  to  periods  of 
good  visibility  that  it  is  difficult  to  plan  its  use.   Also,  only  four  stations 
typically  can  be  occuppied  during  one  flight.   The  lowering  rate  of  the 
CTD  from  the  ship  was  about  lm  sec  '  resulting  in  a  data  rate  of  approximately 
three  points  per  meter.   Lowering  from  the  helicopter  was  usually  faster. 


The  CTD  was  checked  systematically  with  Nansen  bottles  lowered  on  a 
second  wire.   Prior  to  leaving  each  station,  the  temperature  and  salinity 
were  plotted  utilizing  a  Hewlett-Packard  9100  series  computer/plotter 
system.   These  rough  plots  were  used  to  make  immediate  assessments  of  the 
presence  of  f i nestructure  and  to  aid  in  the  decision  of  where  to  make  the 
next  few  stations.   They  also  became  valuable  when  it  was  later  discovered 
that  due  to  a  variety  of  problems  some  digital  data  could  not  be  recovered 
from  the  cassette  tapes.   Cross-sections  of  temperature  were  constructed 
along  transects  normal  and  parallel  to  the  ice  front  to  aid  in  the  identifi- 
cation of  fronts. 

Navigation  was  by  visual  piloting  and  radar  when  within  range  of  land. 
The  navigation  satellite  system  was  the  principal  position  locater  when 
well  away  from  land,  but  due  to  equipment  malfunctions  most  station 
positions  were  determined  by  the  Omega  system,  considered  to  have  an 
accuracy  in  these  waters  of  +_  5  km. 

Current  measurements  were  intended  to  be  made  for  periods  up  to  an  hour 
using   a   Savonius  type  meter  moored  just  above  the  sea  floor  and  with 
the  ice  breaker  lying  to  in  the  near  vicinity.   This  procedure  was 
adopted  due  to  previous  experience  wherein  over-the-s ide  measurements 
were  rendered  nearly  useless  due  to  deviation  of  the  magnetic  direction 
sensor  by  the  ship's  iron.   However,  due  to  poor  seamanship,  the  initial 
attempt  at  mooring  the  current  meter  caused  it  to  be  fouled  in  the  screws. 
The  meter  was  recovered  but  the  prospect  of  continuing  so  risky  and  time- 
consuming  an  operation  appeared  unprofitable  and  no  further  moorings  were 
made. 

Dissolved  oxygen  and  gas  samples  for  carbon  dioxide  and  methane  were 
drawn  at  three  stations:  outside  the  ice,  in  a  region  of  intense  fine- 
structure,  and  behind  the  ice.   Samples  were  drawn  from  depths  above,  below, 
and  within  a  lens  of  temperature  fi nestructure.   The  gas  samples  were  analyzed 
through  the  courtesy  of  Dr.  John  Kelley  of  the  Naval  Arctic  Research 
Laboratory.   Neither  the  oxygen  nor  the  gas  samples  revealed  any  salient 
features  characteristic  of  fi nestructure  activity.   If  there  is  a  correlation, 
much  more  intensive  sampling  would  be  required  to  demonstrate  it. 

The  original  cruise  plan  was  oriented  toward  sampling  in  the  relatively 
unstudied  western  Chukchi  Sea.   However,  denial  of  permission  to  go  west 
of  the  Treaty  Line  forced  a  last-minute  change  of  plans  to  one  similar 
to  MIZPAC  77-   More  emphasis  now  was  to  be  put  on  phenomena  in  the  ice  bays 
and  near  the  branches  of  current  streams  to  attempt  to  confirm  the 
hypotheses  regarding  fronts  expressed  in  Graham  (1978). 

The  first  half  of  the  cruise  proceded  routinely,  concentrating  on 
measurements  in  and  near  the  large  western  embayment  seen  in  Figure  1. 
Observations  had  to  be  terminated  after  Station  58  when  the  ship  had  to 


depart  for  Barrow  to  pick  up  engine  spares.   The  ship  had  been  limited 

to  operations  on  one  or  two  engines  from  the  outset.   From  23  July 

onward  the  ship  operated  in  close  proximity  to  Barrow,  again  mostly 

on  one  engine.   Subject  to  these  constraints,  ice  margin  crossings 

and  transects  of  the  Alaskan  Coastal  Current  were  made,  avoiding  areas  of 

moderate  to  heavy  ice  conditions. 


I  I  1 


DATA 


The  CTD  was  standardized  by  means  of  a  Nansen  bottle  lowered  on  a 
second  wire  to  a  depth  just  above  the  sea  floor.   Fourty  four  such 
comparisons  were  in  suff iciently  unchang  i  ng  water  for  temperature 
standardization  and  kO    for  salinity.   Two  CTD  systems  were  employed;  their 
error  statistics  are   shown  in  the  following  table: 


Mean  Error  (Nansen- 

CTD  #3 
CTD  ttk 

Standard  Deviation 
CTD  #3 
CTD  #k 


CTD) 


Temperature 


-0.012°C 
-0.045°C 

±0.0140°C 
±0.0358°C 


Sal i  ni  ty 


+0.007%o 
-0.007%o 

±O.Ol84%o 
±0.020^%o 


The  CTD  records  its  data  on  a  cassette  which  is  eventually  transferred 
to  a  seven-track  tape  by  APL-UW  for  data  editing  and  analysis  at  NPS. 
Modifications  required  this  year  to  the  computerized  editing  routine, 
described  in  some  detail  in  the  MIZPAC  77  report  (Paquette  and  Bourke,  1978), 
are    presented  in  Appendix  A.   Noise  problems  were  considerably  more  significant 
and  complex  this  year  requiring  a  modification  of  the  noise  removal 
subroutine.   Also,  the  despiking  subroutine  was  altered  to  make  it  more 
logical,  as  indicated  in  Appendix  A. 

Heading  data  for  each  station  are  listed  in  Appendix  C.   These  contain 
station  position  and  number,  date/time  of  CTD  lowering,  water  depth,  type 
of  navigation,  wind,  wave,  and  air  temperature  data,  etc.   Appendix  B  is 
an  explanation  of  the  codes  used  in  Appendix  C. 

Plotting  routines  were  used  to  display  property  profiles  for  each 
station:   temperature,  salinity,  sound  speed,  and  density  (at)-   These  are 
compactly  plotted  four  stations  per  page  and  displayed  in  Appendix  D. 
Stations  taken  in  the  deep  water  of  the  Barrow  Canyon  are  shown  two  per  page. 
The  helicopter  stations  are    plotted  separately  at  the  end  of  Appendix  D. 
Plots  of  4  stations  do  not  appear  in  Appendix  D,  but  their  property  profiles 
are  available  from  the  original  "at  sea"  plots.   Due  to  sensor  malfunctions 
the  data  from  five  helicopter  stations  were  unrecoverable. 

IV.   RESULTS 


The  array  of  stations  occupied  is  shown  in  Figure  1  together  with  an 
ice-margin  position  based  principally  upon  observations  made  at  the  times 
stations  were  occupied.   The  ice-margin  is  thus  not  a  single  synoptic  view, 


73° 


66°  N 


56°  W 


Figure  1.   Station  plot  of  MIZPAC  78.  The  position  of  the  ice 
margin  at  the  time  of  observation  is  also  shown.   The  location 
of  temperature-salinity  cross-sections  constructed  by  Small 
(1979)  are  indicated  by  the  solid  lines  between  stations.   Only 
Crossing  No.  2  is  shown  in  this  report. 


but  a  progressively  distorted  one  which  is  more  useful  in  describing 
ice-related  phenomena.   Synoptic  views  are  also  available.   Figure  2 
is  a  computer-drawn,  expanded  view  of  the  cruise  track  partitioned 
into  an  eastern  and  a  western  section.   Figure  1,  taken  from  Small  (1979) 
also  shows  transects  for  which  temperature  and  salinity  cross-sections 
have  been  constructed.   Only  Crossing  2  is  shown  in  this  report. 

As  seen  in  Figure  3,  Crossing  2  cuts  across  the  warm  current  branch 
that  flows  northwestward  to  Herald  Canyon.   The  warm  water  of  the  central 
Chukchi  is  isolated  from  the  colder  waters  below  by  an  extremely  sharp 
thermocline,  of  the  order  of  5°  to  7°  C/m.   The  warm  water  extends  within 
5  km  of  the  ice  causing  a  sharp  upper-layer  front  to  be  formed  in  both 
temperature  and  salinity.   Because  the  warm  water  from  the  south  is  the 
principal  agent  in  melting  the  ice,  an  upper-layer  front  close  to  the 
ice  is  a  widespread  phenomenon  of  the  MIZ. 

Even  more  striking  in  Figure  3  is  the  lower-layer  front,  coincident 
or  nearly  so  with  the  upper-layer  front.   This  frontal  situation  has 
also  been  observed  in  1975  and  1977  in  almost  the  same  geographic  position 
and  ice  edge  pattern.   Although  four  coincident  fronts  were  found  in 
MIZPAC  78,  these  have  been  rarely  observed  on  other  cruises  perhaps  because 
we  did  not  sample  in  the  areas  conducive  to  their  formation.   All  of  these 
coincident  fronts  are  associated  with  regions  of  slow  ice-edge  recession 
where  the  upper  and  lower-layer  currents  from  the  south  are  assumed  to  flow 
more  or  less  parallel  to  the  ice  edge  and  the  lateral  current  shear  to 
erode  away  the  cold,  relict  under-ice  water  which  otherwise  would  extend 
out  beyond  the  ice  edge.   Other  coincident  fronts  were  observed  at 
Crossings  8,  9,  and  ]k    (Figure  1).   Contrary  to  previous  findings, 
f i nestructure  is  found  south  of  this  coincident  front  but  at  such  large 
distances  from  the  ice  as  to  suggest  some  other  cause  than  simple  interleaving 
of  transition  water  and  northern  bottom  water. 

The  large  ice  embayment  seen  in  Figure  1  centered  at  166°  W   is  an 
annual  feature  observed  in  all  the  MIZPAC  cruises.   Figure  h   and  Crossings 
5  through  8  indicate  that  the  embayment  is  melted  out  by  a  jet-like  core 
of  warm  water.   The  current  pattern  of  Figure  h   has  been  derived  from  the 
ice  melt-back  pattern  and  the  sea  floor  bathymetry.   Because  this  embayment 
recurs  year  after  year  in  nearly  the  same  geographic  position,  we  believe 
that  bathymetric  steering  of  the  warm  southern  water  down  the  25  fathom  trouah 
must  account  for  its  formation.   In  addition  to  the  western  embayment, 
other  examples  of  bathymetric  steering  are   evident.   The  ice  melt-back 
pattern  and  temperature  cross-sections  indicate  that  the  Alaskan  Coastal 
Current  bifurcates  at  topographic  junctures  (Figure  k)    to  cause  the  large 
embayment  northwest  of  Barrow  and  the  smaller  embayment  west  of  Wainwright. 

This  was  the  first  year  that  observations  were  taken  within  the  embayment; 
previously  we  had  tended  to  sample  along  its  periphery.   Figure  5,  which  shows 
the  distribution  of  f inestructure  coded  according  to  Table  |,  indicates 
rather  large  areas  of  moderate  to  strong  fi nestructure.   An  example  of 
this  f i nestructure  is  shown  in  Figure  6  as  nested  temperature  profiles 
taken  along  the  axis  of  the  embayment.   These  and  all  other  f i nestructure 
areas  were  located  in  the  region  of  transition  water  between  the  northern 
and  southern  bottom  water. 


72°N 


t70 


Figure  2A.   Computer-drawn,  expanded-sca  1< 
station  plot  of  MIZPAC  78. 


157°  W 


Figure  2B.   Computer-drawn,  expanded-scale  station 
plot  of  MIZPAC  78. 


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Figure  h.      Schematic  of  upper  level  currents  inferred  from 
the  ice  melt-back  pattern,  temperature  core  analysis,  and 
bottom  bathymetry.   Bottom  contours  are  in  fathoms.   The 
solid  and  dashed  lines  indicate  the  position  of  the  ice 
edge  from  aerial  and  satellite  observations  on  17—18  July 
and  25  July  1978,  respectively. 


73° 


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Figure  5-   Distribution  and  intensity  of  fine- 
structure  during  MIZPAC  78.   Symbols  are  described 
i  n  Table  1 . 


TABLE  I 

FINESTRUCTURE  CLASSIFICATION  SYSTEM 

SYMBOL  CATEGORY  PEAK-TO-PEAK  FLUCTUATION 

Open  circle  Non  existent  <0.2°C 

Circle  with  dot         Weak  0.2  to  0.5°C 

Circle  with  cross       Moderate  0.5  to  1 .0°C 

Solid  circle  Strong  More  than  1.0°C 

Open  tab  on  circle      Nose  w/o  structure 

Solid  tab  on  circle     Nose  with  structure 


11 


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12 


Thoroughly  systematic  exploration  for  fronts  and  f i nes tructure  in 
the  extreme  eastern  Chukchi  was  inhibited  by  ice  breaker  limitations, 
i.e.,  the  ship  was  reduced  to  short  daily  excursions  on  one  screw. 
Nevertheless,  f inestructure  was  found  northwest  and  east  of  Barrow. 
The  deepest  structure  to  date  was  found  at  Station  77  over  the  Barrow 
Canyon.   It  shows  intense  structure  in  the  band  between  80  and  100  m 
undoubtedly  formed  on  the  margins  of  the  Alaskan  Coastal  Current  where 
it  has  submerged  in  the  Barrow  Canyon.   The  notable  lack  of  f i nes tructure 
in  the  embayment  northwest  of  Barrow,  in  contrast  to  the  plentiful 
structure  found  under  similar  conditions  the  previous  year  (Graham,  1978), 
may  have  occurred  because  the  ship  did  not  sample  the  near-ice  areas 
where  f i nestructure  activity  could  be  expected. 

Readers  interested  in  further  detail  are  referred  to  Small  (1979). 
Further  analyses  based  upon  the  entire  series  of  MIZPAC  cruises  are  in 
progress  and  will  be  published  in  the  near  future. 

V.   REFERENCES 

Graham,  G.P.  (1978).   Fi nestructure,  fronts,  and  currents  in  the  Pacific 

marginal  sea-ice  zone  --  MIZPAC  77,  Masters  Thesis,  Naval  Postgraduate 
School,  Monterey,  Tech.  Rpt.  NPS  68-78-006. 

Paquette,  R.  G.  and  R.  H.  Bourke  (1973)-   Oceanograph i c  measurements  near 
the  Arctic  ice  margins,  Tech.  Report  NPS-58PA731 21  A,  Department  of 
Oceanography,  Naval  Postgraduate  School,  Monterey. 

Paquette,  R.  G.  and  R.  H.  Bourke  (1976).   Oceanog raph i c  investigations 
of  the  marginal  sea-ice  zone  of  the  Chukchi  Sea  -  MIZPAC  197**, 
Tech.  Report  NPS-58PA76051 ,  Department  of  Oceanography,  Naval 
Postgraduate  School,  Monterey. 

Paquette,  R.  G.  and  R.  H.  Bourke  (1978).   The  oceanograph i c  cruise  of  the 
USCGC  BURTON  ISLAND  to  the  marginal  sea-ice  zone  of  the  Chukchi 
Sea  --  MIZPAC  77,  Tech.  Report   NPS-68-78-001 ,  Department  of 
Oceanography,  Naval  Postgraduate  School,  Monterey. 

Small,  W.  E.  (1979)-   Fi nes tructure,  fronts,  and  currents  in  the  Pacific 

marginal  sea-ice  zone  --  MIZPAC  78,  Masters  Thesis,  Naval  Postgraduate 
School,  Monterey,  Tech.  Rpt.  NPS  68-79-002. 

Zuberbuhler,  W.  J.  and  J.  A.  Roeder  (1976).   Oceanography,  mesostructure 

and  currents  of  the  Pacific  marginal  sea-ice  zone  -  MIZPAC  75,  Masters 
Thesis,  Naval  Postgraduate  School,  Monterey,  Tech.  Report  NPS-58PA76091 


13 


APPENDIX  A 
DESPI KING  AND  DATA  EDITING 


Introduction  and  Modification  to  the  NOISE  Routine. 


A  few  changes  were  made  in  the  data-editing  routines  described  by 
Paquette  and  Bourke  (1978)  partly  to  make  the  despiking  routine  more 
logical  and  partly  to  handle  the  manifold  increase  in  the  number  of  widely 
aberrant  data  points  this  year.   A  consequence  of  the  latter  situation 
is  that  two  bad  points  could  be  adjacent.   This  destroyed  the  only 
reliable  criterion  useable  for  automatic  noise  rejection:  that  a  noise  spike 
differ  from  the  preceding  point  by  more  than  some  minimum  and  that 
the  curve  return  to  the  vicinity  of  the  projected  curve  within  some  maximum 
tolerance  onthe  next  following  point.   It  also  led  to  some  serious 
feedback  problems  which  it  is  unimportant  to  describe  here.   Low-level 
noise  was  more  prevalent  this  year  and  Noise  Spike-j  not  uncommonly 
failed  to  be  recognized  because  the  j  +  1  -th  point  was  outside  the 
projection  through  points  j-2  and  j-1  by  more  than  the  usually  accepted 
tolerance.   The  noise-rejection  routine  was  modified  to  partly  handle 
these  problems  but  considerable  human  inspection  and  intervention  was 
required  to  get  the  bad  points  out  of  the  data. 

Modification  of  the  Despiking  Routine. 

Previously,  we  had  combined  in  a  lag  constant,  k  ,  the  effects  due 
to  digital  sampling  lag,  physical  displacement  of  the  sensors  from  each 
other  and  the  flushing  lag  of  the  conductivity  cell.   This  was  reasonably 
satisfactory.   Although  the  first  two  effects  are   similar  in  nature, 
the  third  can  be  treated  as  similar  to  the  first  two  only  if  all  the 
change  in  electrical  conductivity  is  due  to  temperature.   When  the  salinity 
changes  rapidly,  this  cannot  be  true  and  some  error  in  the  correction  must 
result.   This  difficulty  was  removed  be  deriving  a  correction  from  the 
slope  of  the  conductivity  curve. 

The  new  correction  procedure  is  as  follows. 

1.  Correct  the  thermometer  for  a  time  constant,  k  ,  (about  0.05 
sec  on  the  down  trace)  by  the  equation 

T  =  T  +  k  dWdt 

where  T  is  the  corrected  temperature,  T   is  the  observed  temperature, 
ky  is  the  time  constant  and  t  is  time.   The  correction  usually  is  small 

2.  Correct  for  the  fact  that  the  conductivity  is  sampled  before  the 
temperature  and  that  there  is  a  small  physical  vertical  displacement 
between  the  two  sensors.   Bring  the  thermometer  into  effective 
coincidence  with  the  cell  by  the  algorithm 

TLG.  =  (l-LG)T.  +  LG  •  T.  . 
J  J         J-1 

where  TLG  is  the  corrected  temperature  and  LG  is  a  lag  constant 
approximating  0.30  but  varying  from  about  0.17  to  0.5- 


14 


3.  Calculate  the  temperature  of  some  thermal  mass  in  the 

conductivity  cell  which  is  buffered  from  TLG  by  a  thermal 

resistance  corresponding  to  a  time  constant  K  ,  approximately 

5  sec.   Call  this  temperature  T  . 

c 

4.  Add  fraction  F  of  T  -  TLG  to  TLG  to  obtain  the  effective  cell 
temperature,  TEF.   F  varies  from  about  0.06  to  0.22. 

5.  Correct  the  conductivity  ratio,  c,  as  though  the  cell  had  a 

time  constant  rather   than  a  length  constant  (assuming  constant 

lowering  rate)  by  the  equation 
i        i 

c  =  c  +  k  dc  /dt 
c 

in  analogy  to  temperature.   Here,  k  approximates  0.20  sec. 

6.  Use  the  corrected  conductivity  ratio  from  Step  5  and  the 
temperature  from  Step  4  to  recompute  the  salinity  and  the 
derived  variables,  sound  velocity  and  sigrna-t.   We  used 

the  Northwest  Regional  Calibration  Center  equations,  although 
recent  work  indicates  that  a  much  simpler  difference  equation 
would  be  adequate. 

While  we  feel  that  the  results  of  this  procedure  are  better  than 
last  year's,  this  is  difficult  to  prove  because  the  constants  are 
not  fixed.   They  vary,  probably  mostly  due  to  differences  in  lowering 
rates.   Good  correction  still  depends  upon  ski  11  in  adjusting  the  constants 
and  it  is  not  much  easier  to  do  so  this  year  than  last  year. 

Some  Examples 

Some  appreciation  of  the  data  editing  task  may  be  had  by  examining 
the  plotted  data  before  editing  for  one  group  of  stations  in  comparison 
with  the  final  edited  results.   Figure  7  shows  Stations  11B,  14,  15  and 
17B  before  editing  and  Figure  8  the  same  stations  afterward.   The 
excursions  to  wild  points  have  been  stopped  at  the  graph  frame.   The 
number  of  wild  points  is  fairly  typical  of  most  of  the  stations.   However, 
one  feature  not  seen  in  most  of  the  stations  is  the  distortions  due  to 
the  ship's  roll  which  may  be  seen  in  Stations  14  and  15.   Loops  due  to 
rolling  of  the  ship  are  visible  in  the  temperature  and  salinity  traces 
in  the  unedited  data.   They  are  more  notable  in  the  salinity.   This  is 
a  situation  in  which  despiking  is  not  very  successful  because  the  spikes 
are   due  to  changes  in  the  lowering  rate  and  some  complex  behavior  of  the 
thermometer,  cell  and  pressure  sensor.   The  cell  quickly  shows  the  effects 
of  self-heating  when  stalled  and  the  time  constant  of  the  cell  increases  at 
slowflushing  rates.   Pressure  sensor  hysteresis  would  be  an  additional 
complication.   On  the  other  hand,  the  dominant  spike  due  to  the  sharp 
temperature  transient,  which  is  seen  most  easily  in  Station  14,  is 
efficiently  removed. 


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The  small  amount  of  smoothing  we  use,  a  running  mean  over  5  points, 
does  not  remove  the  noise  due  to  rolling  of  the  ship  primarily  because 
depth  changes  more  slowly  than  normal  after  the  ratchet  subroutine  is 
applied.   The  noise  spikes,  although  narrow  in  depth,  represent  two 
or  more  times  as  many  points  as  the  usual  three  per  meter.   This 
reduces  the  effectiveness  of  smoothing  over  a  fixed  number  of  points. 
More  drastic  smoothing  is  undesirable  not  only  because  of  the  tendency 
for  unrealistic  broadening  of  real  transients  and  sharp  breaks  but  also 
because  the  noise  spikes  due  to  rolling  are  one-sided  and  drastic  smoothing 
raises  the  apparent  salinity.   It  should  be  noted  that  temperature  is  not 
smoothed  except  insofar  as  it  is  a  result  of  the  ratchet  applied  to  the 
depth . 

It  should  be  emphasized  that  the  spikiness  evident  in  the  edited 
data  of  Figure  8  is  not  typical  of  most  of  the  stations.   An  examination 
of  the  complete  data  in  Appendix  D  will  show  that  most  of  the  salinity 
curves  are  relatively  well  behaved. 


18 


APPENDIX  B 

EXPLANATION  OF  HEADING  CODES 

The  heading  of  the  printed  output  uses  the  coding  and  format  from 
NODC  Publication  M-2,  August  1 96^* ,  with  a  few  exceptions.   Heading  entries 
which  are  not  self-explanatory  are  as  follows:   MSQ  Is  the  Marsden  Square, 
and  DPTH  is  the  water  depth  in  meters.   Wave  source  direction  is  in  tens 
of  degrees,  but  the  direction  99  indicates  no  observation.   The  significant 
wave  height  is  coded  by  Table  10  (Code  t  2«*height  in  meters)  and  the  wave 
period  is  coded  by  Table  11  (COde  ■?  2  =;  period  in  sec);  in  each  case  X 
indicates  no  observation.   Wind  speed,  V,  is  coded  as  Beaufort  force,  Table 
17-   The  barometer  is  in  millibars,  less  1000  if  more  than  3  digits;  wet 
and  dry  bulb  temperature  in  degrees  C.   The  present  weather  is  from  Table  21 
with  cloud  type  and  amount  from  Tables  25  and  26,  respectively.   The 
combination  k   X   S    indicates  that  clouds  cannot  be  observed  usually  because 
of  fog  conditions.   The  visibility  is  from  Table  27  which  is  roughly  in  powers 
of  two  with  Code  k   =  1-2  km.   The  ice  concentration,  IC,  is  in  oktas; 
amounts  less  than  1  okta  are  preceded  by  a  minus  sign  and  indicate 
concentrations  in  powers  of  ten,  e.g.,   10"^  =  -k. 

The  entry,  COD,  is  a  code  to  identify  the  accuracy  of  each  station 
position  based  upon  the  navigation  system  used.   Code  1  indicates  a  position 
determined  by  visual  sightings,  radar  or  by  navigation  satellite;  Code  2 
a  position  determined  by  Omega  or  Loran;  and  Code  3  a  position  determined  by 
dead  reckoning. 


19 


APPENDIX  C 

HEADING  DATA  FOR  MIZPAC  78  STATIONS 

Heading  data  are  listed  on  the  following  pages  for  MIZPAC  78.   The 
coding  conventions  are  those  described  in  Appendix  B.   The  CTD  lowerings 
made  from  the  ship  are  listed  first,  Station  1  through  106.   Stations 
with  an  A,  B  or  C  are    replicated  stations,  normally  made  to  test  the 
performance  of  one  of  the  CTD's.   The  helicopter  stations,  1H  through 
24H,  are  listed  separately;  note  that  much  of  the  cl imatologi cal  data  are 
missing  from  the  helicopter  lowerings. 


20 


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r-P-p-p-r^r-f-P-r^P-p-P-p-r-P-p-p- 
OOOOOOOOOOOoOOOOoOOO 

CpCPCPONCPOO>OaiCpO^G^CTta^coC^CT,OC7^CP 
NNrgoiNNNNNNNNNNNNNNNN 

OOf-OOOOCMfMtMino^OOOOOOOO 

I      I      I      I     1      I      I      i      I      I     1     I     1     I     j      I     1     1     I      I 

r^r-^*p^coi>-r*-,0'0^l'^»n^»ooooOt-<o 

I     I     I     I     I     I     I     I     I     I     I     I     I     I     I     I     I     I     I 

r-r-r-r-r-r-r-r-r-r-r-r-r-r-r-r-r-r-r-f- 
J     i_j_i     i     i     — i     i_i     — <— i     — <     — i— J     — i     — i— i_i_i     — i 


nrtdPiflCitiii'iwwoirtWWPiflMrtWm 


27 


Of 


r~>     f- 


X 

X. 

X 

X 

— 1 
o 

(M 

o 

o 

o 

in 

CO 

1-4 

u-\ 

• 

• 
-0 

o 

• 

> 
a 

•o 

CM 

cm 

eg 

o 

o 

O 

o 

o 

(M 

CM 

00 

o 

(M 

o 

CM 

u 

w 

*u 

u\ 

lA 

o 

ro 

Ul 

1 

1 

i 

•o 

O  r*  ao  u> 

•  •  •  • 

oo  en  o  »* 

•*■  in  o  «*» 

r-  r>-  r-  t«- 


o     <j     <j    o 


m    'i    n    m 


28 


APPENDIX  D 

PROPERTY  PROFILES  FOR  MIZPAC  78  STATIONS 

This  section   contains  plots  of  temperature,  salinity,  sound  velocity 
and  sigma-t  for  all  of  the  stations  of  MIZPAC  78  which  were  successfully 
recovered  from  the  cassette  tapes.   Those  stations  taken  from  the  ship 
are  presented  first;  the  helicopter  stations  follow.   Station  55  is 
shown  prematurely  truncated  while  Stations  61,  H-13  and  H-14  are  missing. 
The  original  plots  made  at  sea  are  available  for  these  four  stations  and 
were  used  where  necessary  to  construct  cross-sections.   The  effort  to 
digitize  these  few  stations  did  not  appear  warranted.   The  original  plots  of 
Stations  H-16,  17,  and  18  are  slightly  distorted  in  depth  due  to  sensor 
problems,  but  are  sufficiently  acceptable  for  frontal  and  f i nestructure 
analysis.   The  CTD  malfunctioned  on  Stations  H-9  and  H-10  providing  no 
data  for  these  stations.   Replicate  lowerings,  e.g.,  Station  1 1A  and  11B, 
were  generally  conducted  to  test  the  performance  of  a  CTD  which  had 
malfunctioned.   Four  such  stations  are  grouped  together  on  the  last 
page  of  the  shipboard  CTD  plots.   Stations  76,  90  and  H-6  show  both  the 
down  and  up  trace  as  there  was  some  doubt  as  to  the  validity  of  the  near- 
surface  downward  salinity  profile. 

The  basic  four-per  page  plot  has  a  maximum  depth  of  70  m.   All 
stations  were  plotted  in  this  way.   In  addition,  deeper  stations  were 
plotted  on  a  ]k0   m  depth  scale,  two  per  page.   These  are  interleaved 
sequentially  with  the  smaller  plots.   To  assist  in  distinguishing  between 
curves  the  temperature  has  been  darkened  three  times  while  the  salinity 
trace  only  twice.   The  curves  are  also  labeled,  T  for  temperature,  S  for 
salinity,  SV  for  sound  velocity,  and  ST  for  sigma-t. 


29 


CD  CD  I—  LJ 
LJLU      • 
\CnO_  CD 

i^SMIZPflC    78    C.T.D.     STATIONS 


r^ozr 
rvico  on  oo 


LO 
(\JLOCD       ■ 
OYIzTCYJOn 


o 

on 
r-  zr  zfcyi 
^ — ■  - — •  c\j  i ' 

r-o  zr 

C\J0OCO0O 

zr 


i — —i ( 1 1 1- 


LO 
CXJLOCD 

rxjz^rvioo 


o 

en 

r-zr  zr  c\i 

h-> 
cocnenh 


cn 
en 

>    c\H 

CO 


H 1 h 


H h 


H h 


DEPTH     (M) 


CO 

en 


zf  *■ 


-en 


h h 


30 


OLJh- LJ 
LJLU      • 
\COO_CO 

i^SMIZPflC    78    C.T.D.     STATIONS 


CvJOO  OO  CO 
ZT 


OJLOOO 
OJzF  OJ00 


o 

00 

r^  =r  =r  oj 

--<— <OJ    I  ' 

ojoooooo 


H 1 1 1 1 h 


OJli^OO 
OJ  zT  OJOO 


O 
00 

<-<—<  OJ    l0 

h-  > 

COCO  CO  f— 


-I h 


CO 

oo 


CO  -- 


-\ h 


H 1 1 h 


DEPTH 


31 


CJCJh-  (_J 
LJUJ      • 
\  CO  Q_  CD 

LD  \      .  LU 

ZZCLD 


OJ0O0Q0O 


LO 

c\jlocd     + 
c\jztc\j  on 


IZPflC    78    C. T. D 

H 1 1 1 1 f. 


STATIONS 

1 1 1 h 


01LDU1 


DEPTH 


32 


(_)<_>  I—  (_) 

L_)LU     • 

^a^MIZPRC 


cyioo  on  03 


78    C. T. D.     STATIONS 

H 1 1-      I   _j    I  ■ * 1 1 h 


LO 

cxjldcd     + 

C\Jr^C\J0O 


03  0OCO 


DEPTH 


33 


CJLJI—  CJ 
C_JUJ      • 

i^SMIZPRC    78    C.T.'D.     STRTIONS 


c\joooooo 


LO 
CULOCD       + 
CXJrFCXJOO 


o 
on 
r-  zr  zrc\j 

cvjoocooo 


LO 
CvlLOCD 

r\jz^cvico 


o 
r-  zr  =rc\j 

h-  > 
on  en  con 


DEPTH     (M) 


ih 


CJCJI—  CJ> 
CJLU      • 
\  COQ_CD 
CD  \      «LU 


"-'°MIZPRC    78    C.T.D.     STATIONS 


r^-ozF 

CXJOOOnOO 


LO 
(\JLOCT) 

c\jzrr\jon 


o 
on 

r-  zr  zr  nj 

— i— 'C\J     I 

r-o  zr 
rvioocnoo 

zr 


LO 
CYIUDCD 
CvlzT  C\J0O 


o 

on 
r-  zr  zr  c\j 

—  —  C\J     lC 

I—  > 

cocncoh 


DEPTH 


35 


OCJh-CJ 
C_)LU      • 
\0~>Q_L0 
CD  \      .  LU 
2Z5IQ_CD 


cmcooooo 


IZPRC    78    C. T. D.     STATIONS 


LO 

CMuocn 
cmz^cmoo 


o 
oo 

— H  — I  cvi    i 

cmoooooo 
zr 


uo 

ojuim 

CM  =T  CM  00 


CO  CO)  00 


H h 


00 
00 


CM 


o  o 


DEPTH     (M) 

36 


1 h 

1 1 1 

\ 

^-^         —  O) 

V  / — ' — 

— — "            — UJ 

-- 

K_ 

=r  -■ 

CM 

\\             > 

-- 

\                     ^ 

1 h 

1 — 

1 1 1 

\ 

H 1 1 1 1 V 


H 1 1- 


00 
CM 


H h 


LJLU      • 
\COQ_  CD 
CD  V.      .  LU 


o-'oMIZPRC    78    C.T.D.     STATIONS 


r-ozr 

CMOOOnCO 
Z^ 


m 
CMuocn 

CM  Zf  CM  On 


o 

CO 

r^  z^zfcm 

r-ozr 
c\joo  on  oo 

zT1 


cmuocq 
cm  zf  cm  on 


o 

on 

r-zr  zr  cm 
^^cm   i0 

i—  > 

cncnoih 


DEPTH 


37 


CJCJI—  LJ 
LJLU      • 
\COQ_  CD 


a-'SMIZPRC    78 


ouoocooo 


LO 
CMLOCT)       + 

c\j=rcvion 


o 

CO 

r-z^zrc\j 
— •— <c\j 

PJOOCOOO 


LO 

cviLOcn 
cvizr  c\jon 


o 
en 

I— > 

co  count- 


C.T.D.     STATIONS 

H 1 1 1 1 h 


DEPTH 


38 


C_)LJh-LJ 
(_)LU     • 
\COQ_CD 

iio^MIZPflC    78    G.T.D.     STRTIQNS 


r^-ozr 
cuoooooo 
zr 


in 
c\jlocd 
c\jzr(\jco 


o 
en 

r-zr  zrc\j 

—«    «-H(\J        I 

r-ozF 

CVICOOOOO 

zr 


LO 

rvimcD 
c\j  zr  c\j  on 


o 

CO 

r-  zr  =r  c\j 

I— > 

en  en  cm 


DEPTH     M) 


39 


C_)(_Jh-LJ 
LJUJ      ■ 

i^ajSMizpnc 


78    C. T. D.     STATIONS 


c\joo  oo  oo 


m 

cmlocd 
cmzfcmoo 


o 

CO 

r-  =r  =r  cm 
—•«- <cm  i " 

1^-OzF 

cmoooooo 


H J- 


H 1 h 


LO 

c\jmoo 

CMzTCMOO 


O 

OO 
r-  zT  ZT  CM 

I—  > 

CO  CO  CO  h- 


CO  1 
oo 


H 1 1 1 1 \- 


_, 1 1 1 1 y. 


DEPTH     (M) 


co 


-co 


CO 


H 1 h 


O 
zf 


1 h- 

— i — i — i — 
i— 

— 1 1 

'\t/~~ 

U  J 

■  CO 

V 

CD  " 
00 

A 

"  Wk 

> 

-■ 

1  /          \ 

, —     f  >**N 

..     \ 

u  ) 

-- 

1 — 

1 — i— 

1 1 1 

-H 

o 


ko 


CJC_>h—  LJ 
CJLU      • 
\COQ_(_D 
CD\      'LlJ 


^SMIZPnC    78 


r-  o  zr 

C\J0OCOCO 

ZT 


LO 
OJLOCD 
OJzT  C\J0O 


O 
CO 

r-ozr 
ojcococo 
zt1 


c\jlocd 
OJzFOJOO 


H h 


o 
on 
r-  zr  zr  c\j 

i—  > 

cococoi- 


co 


C.T.D.     STRTIGNS 


H 1 h 


H 1 1 h 


1 

1 1 1 1 — 

— I 1 

y  '                   co 

f    y          '        ■  -  CO 

-- 

zr  -■ 

ZT 

J 

-- 

> 

-- 

t      " 

-- 

1 

V 

1 1 1 1 

H 

-\ h 


o  o 


DEPTH     (M) 


H 1 \- 


CO 
CO 


H 1 I h 


oo 

zr 


o 


*»l 


CJCJf—  CJ 
CJLJ      • 
\  COQ_  CD 
CD 


^."SMIZPRC    78 


c\joo  en  co 


C.T.D.     STATIONS 

\ 1 1 1 1 h 


m 
ojlood 

C\J=FC\J0O 


co  co  co 


DEPTH 


42 


C__)  C_J>  I —  C_) 

(_)LU      • 

\  coo_  CD 

CD  \      .  LjJ 


o^MIZPflC    78    C.T.D.     STATIONS 


(AJODOIOO 


LP 
(AJLOCD 
C\JzFC\JOD 


o 

00 

cxjooodoo 


uo 

OJLOOD 
CvIrT  C\J0O 


o 

00 

r-  zj4  =r  c\j 

-H^IOJ       |Q 

I—  > 

CO  CO  CO  h- 


DEPTH     (M) 


43 


LJCJh-  LJ> 
CJLU      • 
\COQ_  LD 


C.T.D.     STATIONS 


ojoocooo 


LO 

cviLOcn 
cyizfcvjco 


o 

CO 

rvjcorooo 


H 1 1 1 1 

— 1 

-- 

^ 'CO 

-■ 

.. 

/^^  ^~- -^"~ — >cn 

.y^ 

p 

zV  ■■ 

J 
J 

LO 

-- 

A 

-- 

1 — 

H 1 1 1 1 — 

— 1 

LO 
CMLOCH       ■ 

ojrFCYioo 


H 1 1 1 1 \- 


LO 


a 
on 

r-  zr  =r  c\j 
-■^^   ic: 

i— > 

CO  COCO  h- 


H 1 1 1 1 \- 


cn 
m 


o 


DEPTH     (M) 


kk 


CJCJh— CJ 
CJUJ     . 
\  LDCL.LD 

i^SMIZPRC    78 


C.T.D.     STATIONS 


CMOoonco 


m 
c\jLOcn 
cm  =r  cm  on 


c^cnui 


DEPTH     (M) 


'•s 


UUI-U 
LJUJ      • 
\COQ_  CD 
LD  \      .  UJ 


IZPRC    78    C. T. D.     STATIONS 


cm  oo  on  oo 


i_n 
c\ji_noi 
cvjzfcvjoo 


o 

CO 

^^c\j    i 

r-ozf 
cvicomoo 


c\jloco 
c\j=r  rum 


a 

m 
r-  zf  =rc\j 

i—  > 

COCOCOH 


H h 


H h 


00 


H h 


H 1 h 


h h 


H 1 h 


DEPTH     (M) 


o 


46 


CJC_>h-(_J 
LJLU      • 
\COQ_LD 

5Z2ZCL.Q 


MIZPflC    78    CTD    STATIONS 


cuooooco 


LO 

rumen 
c\j=r  cyioo 


o 
en 

r-  nr  :zr  OJ 

C\|OOCOOO 


ojlocd 

C\J=T  OJCO 


o 

CO 
- — • , — .  CXJ    I 


CO  CD  CO 


(W)     Hld3Q 


1.7 


CJCJI— LJ 
CJLU      • 
\COQ_CD 
CO  \      .LU 


a-'SMIZPRC    78    C.T..D.     STATIONS 


cucooooo 


LO 

ojlocd     ■ 

C\J=FOJ0O 


o 

CO 
OJCOOOOO 


LO 
OJLOOl 

rvizr  cvico 


o 

CO 

r-  zr  zrcvi 

h-> 
cococm 


h 1 h 


H h 


H h 


co 


H 1 1 1 1 h 


h ( 1 y- 


DEPTH 


CO 
CO 


CO 
CO 


CO 


k8 


CJCJH-  <_J 
CJLU      • 
\COQ_L0 

2ZZZCL.O 


MIZPflC    78    CTD    STATIONS 


(AJCDCOOO 


LO 

ojlocd 
c\j=tc\joo 


o 

cxjoooooo 


LO 

ojloct) 
c\j=r  ojco 


o 
oo 


CO  CO  CO 


(W)     Hld3Q 


« 


CJCJI— CJ 
CJLU      • 
\COQ_O 
CD\      -UJ 
2Z2Z0_O 


MIZPnC    78    CTD    STATIONS 


CXJOOOOOO 


in 

CM  LOO") 
C\JzTC\J0O 


O 
CO 

r^-zr  =f<m 

^^OJ    I 

ojoocooo 


LO 

cvjlo  en 
evizr  ojco 


o 

CO 

r^-^rzrcYi 
o 


CO  CO  CO 


(W)     Hld3Q 


50 


(_><_>  I—  (_) 
LJLU      • 

\coa_co 

CD\      »LU 
2Z2ZO_Q 


MlZPflC    78    CTD    STATIONS 


ojoocooo 
zr 


LO 
CYILO  CD 
CYI:zr  OJCO 


CD 
CO 

r^-zr  =rf\j 

r^r-.C\J      I    ■ 

(AjOOoooo 


lo 

OJLOCD 

c\j=rc\joo 


o 

CO 

r-  zr  =r  c\j 


o 


H 1 h 


H 1 f 


H 1 1- 


H 1 h 


H 1 1 h 


H 1 1 CD- 


COCOCO 


LT> 


(W)     Hld3Q 


o 


"CO 
CO 


CO 
CO 


CO 


H 1 \- 


51 


CJLJI—  CJ 
CJLU     • 
\COQ_C0 

g^SMIZPflC    78 


r-Ozf 

OvIOOOOCO 
Zf 


E.T.D.     STATIONS 


LD 

CVJLOCD 

cvizf  c\joo 


o 

CO 

r-=r  =fc\j 

— i— iC\J 

r--ozF 
cm  oo  on  oo 
zr 


LO 

cyiloot 

CXJzfCYJOO 


o 

CO 

r^-zr  zr  c\j 
i—  > 

CO  COCO  t- 


H — 1 1 1 1 h 


h 1 1 1 1 h 


o 


DEPTH     (M) 


52 


CJCJH- LJ 
LJLlJ      • 
\COQ_(_D 


MIZPRC    78    CTD    STATIONS 


C\]COCOOO 


LO 

cxjlocd 

CVIl^OJCO 


o 

CO 

r-zr  =rc\j 
ojoooooo 


h 1 1 1 1 1 1 1 1 1 1 1 h 


en 


CD 
CO 


LO 

ojLOcn 
c\j=r  c\jco 


CO  CO  CO 


Hld3Q 


53 


UUh-  CJ 
(_)UJ  . 
\COQ_CD 


MIZPflC    78    CTD    STRTIONS 


c\j  oo  oo  co 


LO 

f\JLDCD 


o 
oo 

— '^h(\J     i  ■ 

oucoooco 


uo 
cvilooo 
c\j=rc\joo' 


o 
oo 

—  _C\J 


H 1 H 

H 1 h 


u 


o 


A~_ 


H 1 1 h 


COCOCO 


(N)     Hld3Q 


r- 


o 


H 1 1- 


Sh 


CJCJI—  <LJ 
CJLU      • 
\COQ_CD 

i^SMIZPRC    78    C.  T.  D 


r-ozr 
fvioo  en  oo 

zr 


CvlzPCMOQ 


o 

on 
r-  =r  zr  c\j 
— i  — •  oj  r 

r-  ozr 
r\jcooooo 
zr 


Ua. 


H 1 1- 


H 1- 


STATIONS 

< 1 1 1 1 1 


-\ \- 


cviLOcn 
evi  =r  rvico 


o 

00 
r^  zr  zrcvi 

—•—"(\J       |Q 

1—  > 
encocoh 


DEPTH     (M) 


CO 


zr» 


h 1 1- 


cn 


55 


<_)C_)h~  (_) 
CJLU      • 
\COQ_LD 
CD\      -LU 
2Z2IQ_Q 


MIZPflC    78    CTD    STATIONS 


r-o--r 
cvioooooo 


LO 
OJLOCD 
CM  =*•  CVI  CO 


o 

CO 

— 't—(\j  i  ■ 

C\|0O0O0O 

zp 


H 1 1 1 1 1 1 1 1 1 1 1 h 


LO 
CYILOCD 
CM  zT  CM  CO 


o 

en 

r-  =pZTCM 

— <r-<CM 


o 


CO 
CO 


CO 


h 1 1 1 1 1 F 


h 1 1 1 ^ 


h 1 1 1- 


cococo 


-s— 

LO 

(W) 


H 1 1 h 


Hld3Q 


* 


H 1 h 


56 


CJCJX—  LJ 
CJLU      • 
\COQ_  CD 

^oJSMIZPRC    78    C.T.D 


r^-ozr 
cvjcocooo 
zr 


STflTIONS 


in 
cxjlocd     + 
cxjzpcxjco 


o 

CO 

r^zrzr  c\j 
-n^ai  i 

cyioococo 


LO 
CXJLOCD 

c\j  zrcvico 


o 

CO 

r-zr  zrc\j 
—  —  cm   ic: 

i—  > 

CO  CO  CO  i- 


-- 

i 1 1 h- 

— i 

_i 

\  —*. .  .—•-* — -«—  «— «•- 

-■ 

-\\y 

co  -■ 

1 

i 1 1 1- 

-- 

— i 

-- 

H 

O  CD 


co 
co 


CO 


o 


DEPTH     (M) 


57 


(_)(_)  r— (_) 
CJLU     - 

\coo_o 

LD\      -LiJ 


MIZPflC    78    CTD    STATIONS 


ojcooooo 


LO 

ojlooo 
c\j=rc\joo 


o 

' — • , — i  OJ    I 

CYICOOOOO 


LO 

ojlooo 

(WzTCMCO 


o 

CO 


o 


H H 


H 1- 


+ 


H h 


co 
co 


en 


CO  CO  CO 


LO 

(N) 


-I 1 h 


Hld3Q 


o 


CO 


-\ 1- 


58 


CJCJh-  LJ 
C_)LU      • 

CD\      -LU 


^o-oMIZPRC    78    C.T.D.     STATIONS 


OdOOOOCO 


LD 

c\jmcn 
cxjz^fvi  on 


o 
en 

— ^— <c\j   i  ' 
rvjoooooo 

ZF 


ld 

rvjmcn 
r\j=rcvion 


1 


o 

CO 

r-  =r  =r  rvj 
^  — oj   ic 

i—  > 
cnoncoh 


DEPTH     (M) 


59 


(_)(_)  h-LJ 

CJLU      • 
\COQ_  CO 


oJSMIZPRC    78    C.T.D.     STATIONS 


OJOOOOOO 

zl4 


LO 

c\jLOcn 

OJzFOJCO 


H 1 1 1 j4 


r-ozr 
ojcocooo 

z? 


lo 
ojlocd     • 

C\J=T  OJOO 


CO 

CO 


en 
oo 


—  CO 


H h 


H 1 1 h \- 


-co 
-co 


C\J 

OO 


CO 


H h 


ro- 


coco co 


DEPTH     (M) 


H h 


H 1 \ 


LO 
CO 


CO 


o 


60 


LJLJI— LJ 
LJLU      • 
\  O")Q_L0 

^a^MIZPAC    78 


cviooonoo 


C.T.D.     STATIONS 


LO 

ajLncn 
cm  zr  cm  en 


o 

00 

r-  =r  ztcm 

CXJOOCOOO 


CMz?  C\J0O 


o 
on 

r-  =r  =r  c\j 
— •  — «rsj  iq 

h—  > 
cococnH 


H 1 1 1 1 h 


DEPTH     (M) 

61 


CJCJI—  C_) 
ULlJ     • 
\COQ_  CD 


o-oMIZPRC 


78    G.'T.  D.     STATIONS 


cmooooco 


uo 
cmuooo 
cmzfcmoo 


o 

oo 
r-zr  zr  c\j 
— i— .cm 

cm  oo  on  oo 

ZT 


LO 
CMUOOO 
CM  zf  CM  00 


O 

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72 


DISTRIBUTION  LIST 
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Director 

Applied  Physics  Laboratory 

University  of  Washington 

1013  Northeast  40th  Street 

Seattle,  Washington  98195 

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Mr.  E.  A.  Pence  1 

Mr.  G.  R.  Garrison  1 

Library  1 

University  of  Washington 

Department  of  Oceanography 

Seattle,  Washington  98195 

Fisheries-Oceanography  Library  1 

L.  K.  Coachman  1 

Director 

Arctic  Submarine  Laboratory 

Code  54,  Building  371 

Naval  Ocean  Systems  Center 

San  Diego,  CA  92152  25 

Superintendent 

Naval  Postgraduate  School 

Monterey,  California  93940 

Library  2 

Dr.  R.  G.  Paquette  5 

Dr.  R.  H.  Bourke  5 

Polar  Research  Laboratory,  Inc. 

123  Santa  Barbara  Street 

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Naval   Arctic  Research  Laboratory 

Barrow,  Alaska     99723 

Library  1 

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Director 

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Scripps  Institute  of  Oceanography 
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Naval  Intelligence  Support  Center 

4301  Suitland  Road 

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Commander 

Naval  Electronics  Systems 
Naval  Electronics  Systems 
Department  of  the  Navy 
Washington,  D.  C.  20360 

NESC  03 

PME  124 


Command 

Command  Headquarters 


Director 

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Naval  Sea  Systems  Command  Headquarters 

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Department  of  the  Navy 

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Director 

Ordnance  Research  Laboratory 

Pennsylvania  State  University 

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77 


gc  181715 

58  Paquette 

PI96        The  oceanographic 

cruise  of  the  USCGC 
GLACIER  to  the  margi- 
nal sea- ice  zone  of 
the  Chukchi  Sea  - 
MIZPAC  78. 


genGC     58.P196 

The  oceanographic  cruise  of  the  USCGC  GL 


3  2768  001  78016  6 

DUDLEY  KNOX  LIBRARY