6c-C
OCT 2 2 1985
college of
LIBRARY
MARINE SCIENCE CENTER
OREGON STATE UNIVERSIT$
WPWPI -MT
°KO,'" $7745
OCEANOGRAPHY
A COMPILATION OF
OBSERVATIONS FROM
MOORED CURRENT METERS
VOLUME XV
CURRENTS, TEMPERATURE, AND
PRESSURE COLLECTED NEAR THE
EMPEROR SEA MOUNTS
June 1982-November 1983
by
R. D. Riilabury
OREGON STATE UNIVERSITY
J. S. &Otero
E A_ Seifert
D C Root
Data Report 118
Rel stance Orr 13
September. 1905
National Science Foundation
Grant No. OCE 80-18227
College of Oceanography
Oregon State University
Corvallis, OR 97331
A COMPILATION
OF OBSERVATIONS
FROM MOORED CURRENT METERS
VOLUME XV
•
CURRENTS, TEMPERATURE, AND PRESSURE
COLLECTED NEAR THE EMPEROR SEA MOUNTS
June 1982 - November 1983
by
R. D. Pillsbury
J. S. Bottero
E. A. Seifert
D. C. Root
Data Report 118
Reference 85-13
September, 1985
National Science Foundation
Grant No. OCE 80-18227
TABLE OF CONTENTS
1
Description of Processed Data 2
Introduction References 5
Installations
Mooring A 7
Mooring B 25
Mooring C 71
,
44°
ip < 2000 m
< 3000 m
KM < 4 0 0 0 m
* MOORING
STATIONS
180°
176°
172°E
168°
I
164°
i
160°
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Introduction
Emperor moorings A, B, C, and D were installed on Cruise
No.11168 aboard the R/V THOMPSON in June and July of 1982. They
were recovered on Cruise No. 178 aboard the R/V THOMPSON
seventeen months later in November 1983.
Moorings B and C were recovered in their entirety. Mooring
A had been severed just below RCM 3135. The remaining line had
dropped and become tangled in the rest of the mooring line below
the acoustic release. When the release was fired the mooring
rose slightly then fell back down. The bottom meter on mooring A
was eventually recovered by dragging. During recovery mooring D
behaved in the same manner as Mooring A.
In all, eight meters were recovered. Seven gave good data,
one flooded. While the amount of data recovered from this
experiment was not as complete as we would like, there are
several reasons for the data loss. Due to a change in ship
schedule the moorings were deployed 17 months rather than the 12
months initially planned. The deployment period exceeded the
capacity of the current meters for data storage and for battery
life. The recovery cruise was made in severe weather under tight
time constraints. These conditions made grappling for mooring D
impossible. An attempt made a year later was not successful.
These moorings were installed to collect data as a part of a
more extensive experiment which included hydrographic
2
observations and analysis of historic data in the region of the
Emperor Seamounts. The Emperor Seamount Chain is the major
topographic feature which the Kuroshio and Subarctic fronts
cross. The data from the moorings will provide a picture of
changes in mean and eddy kinetic energy and velocity shear
between the basins separated by the Seamounts.
For the reader who is not familiar with the operation of the
Aanderaa current meter, the general calibration techniques for
these meters are presented in Pillsbury,et al(1974). The
pressure calibration techniques and the latest techniques for
compass calibration are presented in Pillsbury,et al(1980).
The general design of the mooring follows that of the
intermediate mooring developed at Woods Hole Oceanographic
Institution (Heinmiller and Walden, 1973).
Description of the Processed Data
For each mooring a header page summarizes the mooring
information and meter performance. On that page the depth of the
instrument is recorded. Depths were obtained by one of two
methods. Meters equipped with pressure sensors were assigned
depths corresponding to the minimum recorded pressure in
decibars. The minimum pressure was determined from unfiltered
data. Conversion of decibars to meters was done with a
relationship developed by Professor J. L. Reid of Scripps:
z(m) = (0.992446)P - (2.28717x10 -6 )P 2 +(2.08213x10-11)P3
3
This equation is based on a world ocean average density profile.
The depths of the meters which did not have pressure sensors were
estimated from the bottom depth (in corrected meters) and the
mooring line lengths as determined by a computer model that
calculates line tension and the amount of stretch. Again,
minimum rather than average or maximum depths were estimated. In
every case the depths were rounded to the nearest ten or fifty
meters depending on the range and accuracy of the pressure
sensor.
Each meter has a serial number assigned to it by the
manufacturer. Each successive tape recorded by that machine is
numbered with the serial number and the tape number. Thus,
485/10 indicates the tenth tape recorded by machine 485.
The table of statistics following the header page gives
arithmetic mean, standard deviation, maximum value, minimum
value, and the number of hourly values of the record length for
each variable measured. Positive east (u) is the true east-west
velocity component and positive north (v) is the true north-south
velocity component.
Progressive vector diagrams, speed, direction, temperature,
and pressure histograms; progressive vector diagrams; stick
figures; real time plots; rotary spectra; and conventional power
spectra follow.
4
The stick figures and the time series plots were made from
filtered data. Although the original measurements were made
every hour, plots which show each point are too long to be easily
included in this report. To reduce the plots and still present
the important low frequency fluctuations, the hourly data were
filtered with a 60 + 1 + 60 Cosine-Lanczos filter with
half-amplitude at 40 hours and half-power at 46.6 hours. The
data were then resampled at 6-hour intervals. Time series plots
of u, v, T, and P are presented. The stick figures were made
from filtered u and v. For clarity only two sticks per day are
plotted.
The rotary (two-sided) spectra have 32 degrees of freedom,
which yields a 95% confidence interval of about 4.3 decibels.
Confidence intervals for the other spectra (kinetic energy,
temperature, and pressure) vary with frequency and are shown
explicitly on the plots.
ACKNOWLEDGEMENTS
The funds for the current meter mooring work and this data
report came from a National Science Foundation grant OCE 80-18227
which is gratefully acknowledged. Appreciation is also expressed
to the Captain and crew of the R/V THOMPSON. The installation of
the moorings was done under the supervision of E. A. Seifert. He
and Dennis Root along with members of the WHOI buoy group are
acknowledged for the effort on the recovery cruise.
5
References
Heinmiller, R. G. and R. G. Walden. 1973. Details of Woods Hole
Moorings. Woods Hold Oceanographic Institution Technical
Report 73-71. 19pp.
Pillsbury, R. D., J. S. Bottero, R. E. Still and W. E. Gilbert.
1974. A Compilation of Observations from Moored Current
Meters, Vol. VI, Oregon Continental Shelf, April-October 1972.
Oregon State University, School of Oceanography, Corvallis.
Data Report 57. Reference 74-2.
Pillsbury, R. D., F. Sciremammano, Jr., J. S. Bottero, R. E.
Still. 1980. A Compilation of Observations from Moored
Current Meters, Vol. XII, Currents, Temperature and Pressure
in the Drake Passage during FDRAKE '77, '78. Oregon State
University, School of Oceanography, Corvallis. Data Report
82.
Reference 80-11.
Radio Buoy
••
•
••
•
••
••
•
RCM4 No.1326
at 650m
RCM4 No.3135
at 1350m
EMPEROR Mooring A
35°17.38'N 167°03.07'E
Installed : 28 Jun 1982
Recovered : 17 Nov 1983
RCM5 No. 500
at 3650m
Acoustic Release
No. 723A
5730m
EMPEROR MOORING A
Position: 35°17.38 N, 167°03.76 E
Depth of Water: 5730 m
Set at: 0447 UCT 28 JUN '82 by R/V T.G. THOMPSON
Retrieved at: 1932 UCT 17 NOV '83 by R/V T.G. THOMPSON
Data Interval: 0903 UCT 28 JUN '82 to 2303 UCT 9 SEP '83
Instrumentation
Depth
650 m
1350 m
3650 m
Serial No./Tape No.
RCM4 1326/
RCM4 3135/
RCM5 500/62
Instrument 1326 was not recovered.
Instrument 3135 was not recovered.
Instrument 500 recorded speed, direction, temperature and
pressure until 2303 UCT 9 SEP '83 when the battery apparently
failed. Due to instrument malfunction one section of the
temperature record has been set to zero: lines 6664 ( 0003 UCT
2 APR 83) through 8434 (2303 UCT 14 JUN '83).
10
EMPEROR MOORING A
3650 METERS
MIN
MEAN
MAX
SD
N
S(cm/sec)
0.70
3.67
16.80
2.98
10527
u(cm/sec)
-8.80
0.15
14.90
2.24
10527
v(cm/sec)
-16.70
-2.14
8.90
3.56
10527
1.44
1.46
1.52
0.01
8756
3702.00
3769.10
4201.00
62.92
10527
T(°C)
P(decibars)
11
150 KM
- -900
3650 M AT EMPEROR MOORING R. 28 JUN 82 - 9 SEP 83.
3650 M AT EMPEROR MOORING R. 28 JUN 82 - 9 SEP 83.
I
IMEAN
0. 40
O. 30
O. 20
O. 10
O. 00
0
I
12
16
SPEED. CM PER SEC
20
24
I
I
28
3650 M AT EMPEROR MOORING A. 28 JUN 82 - 9 SEP 83.
O. 10 -
0. 08 -
O. 06 -
O. 04 -
O. 02 -
0.00
IIIIIIIIIIIIIIIIII11111111111111111
0
30
60
90
120
150
180
210
240
DIRECTION. DEGREES TRUE
270
300
330
360
3650 M AT EMPEROR MOORING A. 28 JUN 82 - 9 SEP 83.
It
0. 60 -
MEAN
0. 50
0. 40
O. 30
O. 20
0. 10
0. 00
1. 42
1.44
1.46
1.48
1. 5
TEMPERATURE. DEGREES C.
1.52
1.54
3650 M AT EMPEROR MOORING A. 28 JUN 82 - 9 SEP 83.
‘1 MEAN
PRESSURE. DECIBAliS
NORTH
20 -
10 -
0
-10 -
--20 JUN JUL RUG SEP OCT NOV DEC JRN FEB MRR RPR MAI JUN JUL RUG SEP
3650 METERS RT EMPEROR MOCKING R.
LLP FILTERE_1 CURRENT
20
10
0
-10
-20
1
1
1
1
1
-I-
I
JUN JUL RUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
3650 v ETEBS AT EVPEBOB NOORI
LLP FILTERED U COvPONENT
G R.
20 -
10
C)
hi
0
c-i
-10
-20 JUN JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL RUG SEP
3650 METERS AT EMPEROR MOORING A.,
LLP FILTERED V COMPONENT
1.60
1.55
1.50'
U)
CC:
uJ
1.45
C3
1.40
1. 3
JUN
JUL
AUG
SEP
OCT
NOV
DEC
JAN
FEB
MAR
APR
MAT
1------1
JUN JUL AUG SEP
3650 METERS AT EVPERrR VCCRING A.
LLP FILTERED TEMPERATURE
4200
4100
1000
3900
3800
3700
JUN JUL RUG SEP OCT NOV OEC JAN FEB MAR APR MAY JUN JUL AUG SEP
3650 METERS AT EMPERCR MOCHING A.
LLP FILTERED PRESSURE
UNFILTERED CURRENT. 3650 M AT EMPEROR MOORING A.
1000
FREQUENCY. CYCLES PER DAY
22
UNFILTERED CURRENT. 3650 M AT EMPEROR MOORING R.
1000
100
10
1
U1
O
0. 1
0.01
0.001
95 PERCENT
0. 0001 O. 01
0. 1
1
10
FREQUENCY, CYCLES PER DRY
100
23
UNFILTERED TEMPERATURE. 3650 M AT EMPEROR MOORING A.
0.001
95 PERCENT
0.0000001
0.01
I
I 1111111
0.1
1
1 1111114
1
11 111111+
10
FREQUENCY, CYCLES PER DAY
1 I 1111111
100
24
UNFILTERED PRESSURE. 3650 M AT EMPEROR MOORING R.
1000
0. 01
95 PERCENT
0. 001
0. 01
1
1 1 1 11111
O. 1
I
I I 111111
1
I
I I IIIIII
10
FREQUENCY. CYCLES PER DRY
1
1 1111111
100
26
Radio Buoy
••
•
•••
••
RCM5 2129
at 420m
••
•
RCM4 3185
at 1100m
EMPEROR Mooring B
34° 19.71' N 167° 02.15' E
Installed : 30 Jun 1982
Recovered : 16 Nov 1983
•
•
•
RCM5 2265
at 3400m
Acoustic Release
No. 723A
1•11n01R
5730m
•
•
•
•
27
EMPEROR MOORING B
Position: 34°19.71°N, 167°02.15'E
Depth of Water: 5730
Set at: 0406 UCT 30 JUN '82 by R/V T.G. THOMPSON
Retrieved at: 0119 UCT 16 NOV '83 by R/V T.G. THOMPSON
Data Interval: 0800 UCT 30 JUN '82 to 0102 UCT 16 NOV '83
Instrumentation
Depth
420 m
1100 m
3400 m
Serial No./Tape No.
RCM5 2129/3
RCM4 3185/9
RCM5 2265/17
Instrument 2129 recorded speed, direction, temperature, and
pressure until 2100 UCT 13 AUG '83 after which time the battery
apparently failed.
Instrument 3185 recorded speed, direction, temperature, and
pressure until the instrument was recovered.
Instrument 2265 recorded speed, direction, temperature and
pressure until 0000 UCT 13 JUN '83 when the battery apparently
failed. The raw direction histogram showed spikes at multiples
of 32. These values were removed by interpolation. The
resulting distribution of directions still shows an anamalous
periodicity.
28
EMPEROR MOORING B
420
METERS
MAX
SD
N
MIN
MEAN
S(cm/sec)
0.80
16.45
45.90
10.26
9829
u(cm/sec)
-45.50
3.73
43.80
13.61
9829
v(cm/sec)
-39.90
4.35
40.80
12.56
9829
5.30
7.55
13.25
1.95
9829
428.20
442.73
563.30
20.89
9829
T(°C)
P(decibars)
1100 METERS
S(cm/sec)
0.80
6.55
23.60
3.45
12089
u(cm/sec)
-23.40
0.18
20.10
5.40
12089
v(cm/sec)
-18.50
0.36
18.40
5.04
12089
2.69
2.96
3.50
0.17
12089
1135.50
1155.59
1267.70
21.16
12089
T(°C)
P(decibars)
3400
METERS
S(cm/sec)
0.80
3.18
12.70
2.03
8345
u(cm/sec)
-8.30
0.13
10.50
2.55
8345
v(cm/sec)
-10.40
-0.71
8.40
2.69
8345
1.46
1.49
1.54
0.01
8345
3425.00
3439.27
3478.00
6.58
8345
T(°C)
P(decibars)
2000 KM
-500
420 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 AUG 83.
450 KM
-150
-300
1100 METERS AT EMPEROR MOORING B. 30 JUN 82 - 16 NOV 83.
31
-50 KM
- -250
3400 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 JUN 83.
420 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 AUG 83.
‘1 MEAN
0.100.090.080.070.080.050.040.030.02-
0.01.111141111111 0.00
0
10
20
30
SPEED, CM PER SEC
40
II
SO
1100 METERS AT EMPEROR MOORING B. 30 JUN 82 - 16 NOV 83.
If
0.16 -
MEAN
0.14 0.12
0.100.08 0.06 0.04 0.02 0.00
I
0
1
1
14
5
F141141-I
10
1
I
15
SPEED, CM PER SEC
I
I
f
1-1r--"°11,'"nn•1--1-1
20
25
3400 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 JUN 83.
11
MEAN
0.30
0.25
0.20
0.15
0.10
0.05
0.00 0
2
4
6
8
SPEED, CM PER SEC
10
12
14
420 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 AUG 83.
0.070.06
0.05
••n•••••
0.04
0.03
0.02
0.
0
1
0.00
0
30
60
90
120 150 180 210 240 270 300 330 360
DIRECTION, DEGREES TRUE
1100 METERS AT EMPEROR MOORING B. 30 JUN 82 - 16 NOV 83.
0.045 0.040 -
0.0350.030-
0.025 -0.020 -
0.015 0.010 0.005 0.000 0
30
60
90
120 150 180 210 240 270 300 330 360
DIRECTION, DEGREES TRUE
3400 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 JUN 83.
0.08 0.07 0.06 0.05 -
0.040030.02
0.01 0.00 0
30
60
90
120 150 180 210 240 270 300 330 360
DIRECTION, DEGREES TRUE
420 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 AUG 83.
‘11 MEAN
0.220.200.180.160.140.120.100.080.06-
7
0.04-
7
0.020.00 4
6
8
10
TEMPERATURE, DEGREES C
12
14
1100 METERS AT EMPEROR MOORING B. 30 JUN 82 - 16 NOV 83.
I
t MEAN
0.18
0.16
0.14
0.12
0.10
0.08
0.08
0.24
0.020.00 2.6
2.8
3.2
TEMPERATURE, DEGREES C
3.4
3.6
3400 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 JUN 83.
MEAN
0.35
0.30 -
0.25
0.20 -
0.15-
0.10
0.05 -
0.00 1.44
1.46
1.48
1.5
1.52
TEMPERATURE, DEGREES C
1.54
1.56
420 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 AUG 83.
0.70
I/
-
MEAN
0.60 -
0.50 -
0.40 -
0.30 -
0.20 -
0.10 -
0.00
400
i
I
i
420
440
i
I
460
I
17
480
500
PRESSURE, DECIBARS
520
540
560
580
1100 METERS AT EMPEROR MOORING B. 30 JUN 82 - 16 NOV 83.
‘1 MEAN
0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 1100
1150
1200
PRESSURE, DECIBARS
1250
1300
3400 METERS AT EMPEROR MOORING B. 30 JUN 82 - 13 JUN 83.
It MEAN
0.700.600.500.400.300.200.100.00 3400
3420
3440
3460
PRESSURE, DECIBARS
3480
3500
NORTH
40
30
20
U
cr)
10
0
10
—20
—30
40
JUL
RUG SEP
OCT
NOV
DEC
JAN FEB MAR
420 METERS AT MOORING B.
LLP FILTERED CURRENT
APR
MAT
JUN
JUL
RUG
20 -
-20
NORTH
JUL RUG SEP OCT NOV DEC JAN FEB MAR APR MAT JUN JUL AUG SEP OCT NOV
1100 METERS PT MOORING B.
LLP FILTERED CURRENT
T
10
NORTH
E
-10
JUL
RUG
SEP
OCT
NOV
DEC
JAN
3400 METHS AT MOORING B.
LLP FILTERED CURRENT
FEB
MAR
APR
MAY
JUN
403020 -
0 -10 -20 -30 -40 JUL AUG SEP OCT NOV DEC JAN FEB
MAR APR MAY JUN
420 METERS AT N'OORING B
LLP FILTERED U COMPONENT
JUL
AUG
20 -
U
r
U
-20 JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV
11 00 VETERS AT MOORING B
LLP FILTERED U COvPONENT
SEP
OCT
NOV
DEC
JAN
FEB
3400 METERS AT MOORING B
LLP FILTERED U COMPONENT
MAR
APR
MAY
JUN
U
U)
U
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG
420 METERS AT VOORING B
LLP FILTERED V COMPONENT
20
-20
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV
1100 METERS AT MOORING B
LLP FILTERED V COMPONENT
U
z
U
SEP
OCT
NOV
DEC
JAN
FEB
3400 METERS AT MOORING B
LLP FILTERED V COVPONENT
MAR
APR
MAY
JUN
14 -
JUL
AUG SEP
OCT
NOV
DEC
JAN FEB MAR APR MAT
420 METERS AT MOORING B.,
LLP FILTERED TEMPERATURE
JUN
JUL
RUG
2. 7
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV
1100 METERS AT MOORING B.
LLP FILTERED TEMPERATURE
. 60 -
. 55
50
. 45
.40
.35 JUL
AUG
SEP
OCT
NOV
DEC
JAN
FEB
3400 N'ETERS AT MOORING B
LLP FILTERED TEMPERATURE
MAR
APR
MAY
JUN
560 -
540 520 500 480 460
440 420
JUL
I
AUG
I
4
SEP
OCT
NOV
DEC
JAN
FEB
420 METERS AT MOORING B.
LLP FILTERED PRESSURE
MAR
APR MAY JUN JUL AUG
1280 1260 1240 1220 1200 -
1
1180
►
1160 -
JIIVVI\ 1‘
1140-
1120
\k.11
I
I
I
►
4
I
►
1
4
4-
►
f
I
,
1
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL RUG SEP OCT NOV
1100 METERS AT MOORING B.
LLP FILTERED PRESSURE
1
3470 -
3460
3450
Y
3440
3430
Ifqk
JUL
AUG
SEP
OCT
11\
NOV
OEC
JAN
3400 METERS PT MCOHING B.
LLP FILTERED PRESSURE
FEB
MAR
APR
MAY
JUN
UNFILTERED CURRENT. 420 M AT EMPEROR MOORING B.
10000
0. 1
-3
-2
-1
FREQUENCY. CYCLES PER DAY
UNFILTERED CURRENT. 1100 M AT EMPEROR MOORING B.
1000 =
111\AAS‘A
0. 1
-3
-2
0
1
FREQUENCY. CYCLES PER DAY
2
3
UNFILTERED CURRENT. 3400 M AT EMPEROR MOORING B.
MO%
0. 01
-3
-2
0
1
FREQUENCY. CYCLES PER DAT
2
62
UNFILTERED CURRENT. 420 M AT EMPEROR MOORING B.
10000 =
=Mit
MINN
95 PERCENT
400
WOO
ONE
0. 01
0. 01
1
1 1 1 1 1111
0. 1
1
1 I 1 1 1111
1
11 1 1 1 1111
10
FREQUENCY. CYCLES PER DAY
I
I 1 1 1 1111
100
63
UNFILTERED CURRENT. 1100 M AT EMPEROR MOORING B.
1000
100
95 PERCENT
O. 001 1
0. 01
11 1 1 1 1111
O. 1
I
1 1 I 1 1111
1
I
1 1 1 1 1111
10
FREQUENCY. CYCLES PER DAY
1
1 1 1 1 1111
100
64
UNFILTERED CURRENT. 3400 M AT EMPEROR MOORING B.
100
10
0.01
0.001
95 PERCENT
0.0001 1
0.01
I
1111111i
0.1
I
111144
1
I
11111111
10
FREQUENCY. CYCLES PER DRY
I
11111111
100
65
UNFILTERED TEMPERATURE. 420 M AT EMPEROR MOORING B.
100 =
0. 0001 =
=I=
95 PERCENT
400
0. 00001
O. 01
t
I 1 1 11111
0. 1
I
1 1 1 11111
1
1
1 1 1 11111
10
FREQUENCY, CYCLES PER DAY
1
1 I 1 11111
100
66
UNFILTERED TEMPERATURE. 1100 M AT EMPEROR MOORING B.
moo
••••n
0. 000001 =
95 PERCENT
0. 0000001
O. 01
0. 1
1
10
FREQUENCY. CYCLES PER DAY
100
67
UNFILTERED TEMPERATURE. 3400 M AT EMPEROR MOORING B.
0.001 =
0. 0000001 =
95 PERCENT
••n•n•
0.00000001
1
0.01
1 1 1 11111
0.1
1
1 1 1 11111
1
11 1 1 11111
10
FREQUENCY. CYCLES PER DAY
1
1 i 1 11111
100
68
UNFILTERED PRESSURE. 420 M AT EMPEROR MOORING B.
10000 =
O. 1 =
ONO
0.01 =
95 PERCENT
IMO
O. 001
0. 01
1
1 1 1 1 1111
O. 1
1
1 1 1 X1111
1
I
I 1 1 1 1111
10
FREQUENCY. CYCLES PER DRY
1
1 1 1 1 1111
100
69
UNFILTERED PRESSURE. 1100 M AT EMPEROR MOORING B.
10000
1000
100
10
0. 1
0.01
95 PERCENT
0.001
1
0.01
f
1 1111111
0.1
1
1 1111111
1
1
1 1111111
10
FREQUENCY. CYCLES PER DAY
11 1111411
100
70
UNFILTERED PRESSURE. 3400 M RT EMPEROR MOORING B.
1000
100
95 PERCENT
O. 001
I
0.01
1
I 1111!11
0.1
11 1 111111
1
1
I 1 111411
10
FREQUENCY, CYCLES PER DRY
11 1 111111
100
72
Radio Buoy
•••
••
•
••
••
•
RCM5 1323
at 950m
RCM4 1807
at 1650m
EMPEROR Mooring C
38°58.20' N 171°05.95' E
Installed : 14 July 1982
Recovered : 23 Nov 1983
••
•
RCM5 1324
at 3950m
RCM5 2266
at 5450m
Acoustic Release
No. 743A
. •
.
•••• .•6150m
73
EMPEROR MOORING C
Position: 38°58.20'N, 171°05.95'E
Depth of Water: 6150 m
Set at: 0636 UCT 14 JUL '82 by R/V T.G. THOMPSON
Retrieved at: 2213 UCT 23 NOV '83 by R/V T.G. THOMPSON
Data Interval: 0946 UCT 14 JUL '82 to 2102 UCT 23 NOV '83
Instrumentation
Depth
950
1650
3950
5450
Serial No./Tape No.
m
m
m
m
RCM5
RCM4
RCM5
RCM5
1323/23
1807/3
1324/9
2266/
Instrument 1323 recorded speed, direction, temperature, and
pressure until 2346 UCT 5 AUG '83 when the battery apparently
failed.
Instrument 1807 recorded speed, direction, temperature, and
pressure until the instrument was recovered. The instrument
appears to have been running about one hour slow when recovered.
Instrument 1324 recorded speed, direction, temperature, and
pressure. Direction was recorded until line 6549 (0601 13 APR
'83). Speed was recorded until line 6744 (1501 22 APR '83).
Temperature and pressure were recorded until line 7094 2301 5
MAY '83.
Instrument 2266 flooded. No data was recovered.
•
74
EMPEROR MOORING C
950 METERS
N
MIN
MEAN
MAX
SD
S(cm/sec)
0.70
6.53
27.20
4.58
9303
u(cm/sec)
-13.00
3.88
26.60
5.21
9303
v(cm/sec)
-15.00
1.53
19.90
4.38
9303
2.98
3.41
3.79
0.14
9303
951.50
959.09
993.50
5.82
9303
T(°C)
P(decibars)
1650 METERS
S(cm/sec)
0.80
5.75
21.20
2.96
11940
u(cm/sec)
-17.90
1.91
20.00
4.66
11940
v(cm/sec)
-12.50
1.94
16.40
3.52
11940
2.10
2.25
2.41
0.05
11940
1658.20
1666.42
1698.70
5.88
11940
T(°C)
P(decibars)
3950 METERS
S(cm/sec)
0.70
5.62
17.30
2.99
6774
u(cm/sec)
-4.60
4.19
15.40
2.78
6549
v(cm/sec)
-5.10
2.85
11.60
2.34
6549
1.46
1.48
1.53
0.01
7094
4008.00
4012.32
4032.00
3.10
7094
T(°C)
P(decibars)
•
750 KM
-250
250
500
750
1000
1250
-250
950 METERS AT EMPEROR MOORING C. 14 JUL 82 - 5 AUG 83.
1500 KM
76
- 1000 KM
200
-200
400
600
800
1000 KM
- -200
1650 METERS AT EMPEROR MOORING C. 14 JUL 82 - 23 NOV 83.
77
3950 METERS RT EMPEROR MOORING C. 14 JUL 82 - 13 APR 83.
950 METERS AT EMPEROR MOORING C. 14 JUL 82 - 5 AUG 83.
11
MEAN
0.20-
0.15-
0.10
0.05-
0.00 0
4
8
12
16
SPEED, CM PER SEC
20
24
28
1650 METERS AT EMPEROR MOORING C. 14 JUL 82 - 23 NOV 83.
It
0.16 -
MEAN
0.14 0.12 0.10 0.08 0.06 0.04 0.02 0.00
'11n
0
5
10
15
SPEED, CM PER SEC
.141111
20
25
14 JUL 82 - 22 APR 83.
3950 METERS AT EMPEROR MOORING C. MEAN
O. 30
O. 25
O. 20 -
0.15
0. 10
O. 05
0. 00 0
4
8
12
16
SPEED, CM PER SEC
20
24
28
950 METERS AT EMPEROR MOORING C. 14 JUL 82 - S AUG 83.
0.08-
0.08-
0.04-
0.02 -
0.00
0
30
60
90
120 150 180 210 240 270 300 330 360
DIRECTION, DEGREES TRUE
1660 METERS AT EMPEROR MOORING C. 14 JUL 82 - 23 NOV 83.
0.08
0.06
0.04-
0.02
0.00
0
30
60
90
120 160 180 210 240 270 300 330 360
DIRECTION, DEGREES TRUE
3950 METERS AT EMPEROR MOORING C. 14 JUL 82 - 13 APR 83.
O. 25 -
0.20 -
O. 15 -
0. 10 -
0.05 -
0.00
11111111
0
30
60
1
90
111114
120
150
180
210
240
DIRECTION, DEGREES TRUE
270
300
330
360
950 METERS AT EMPEROR MOORING C. 14 JUL 82 - 5 AUG 83.
MEAN
0.20
0. 1 5
0.10
0.05
0.00 2.8
3
3.2
3.4
TEMPERATURE, DEGREES C
3.6
3.8
1650 METERS AT EMPEROR MOORING C. 14 JUL 82 - 23 NOV 83.
‘1 MEAN
0.40
•
0.30
0.20
0.10
0.00 2
2.1
2.2
2.3
TEMPERATURE, DEGREES C
2 . 4
2.5
3950 METERS AT EMPEROR MOORING C. 14 JUL 81 - 5 MAY 83.
It
O. 70 -
MEAN
O. 60 -
O. 50 -
O. 40 -
O. 30 -
•
O. 20 -
0. 10 -
O. 00 1. 4
1.45
1.5
TEMPERATURE, DEGREES C.
1.55
1.6
3950 METERS AT EMPEROR MOORING C. 14 JUL 82 - 5 MAT 83.
It
0.70 -
MEAN
O. 60 -
0. 50 -
O. 40 -
O. 30 -
O. 20 -
O. 10 -
O. 00 3990
4000
4010
4020
PRESSURE. DECIBARS
4030
4040
4050
950 METERS AT EMPEROR MOORING C. 14 JUL 82 - 5 AUG 83.
‘1 MEAN
0.50
0.40
0.30
0.20
0.10
0.00 940
950
960
970
PRESSURE, DECIBARS
980
990
1000
1650 METERS AT EMPEROR MOORING C. 14 JUL 82 - 23 NOV 83.
11
MEAN
0.50-
0.40
0.30
0.20
0.10
0.00 1650
1660
1670
1680
PRESSURE, DECIBARS
1690
1700
20 —
NORTH
10—
U
W
cf)
U
0
-10 JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG
950 METERS AT MOORING C
LLP FILTERED CURRENT
20
NORTH
10
0
—10 JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV
1650 METERS AT MOORING C
LLP FILTERED CURRENT
T
20 -
NORTH
10
0
-10
JUL
AUG
SEP
OCT
NOV
DEC
JAN
3950 METERS AT MOORI\G C
LLP FILTERED CURRENT
FEB
MAR
APR
MAY
20 -
-10
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG
950 METERS AT MOORING C
LLP FILTERED U COMPONENT
20 -
10
-10 JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV
1650 V ETERS AT v OORING C
LLP FILTERED U COVPONENT
20 -
-1 0
JUL
AUG
SEP
OCT
NOV
DEC
JAN
3950 METERS AT MOORING C
LLP FILTERED U COMPONENT
FEB
MAR
APR
MAY
20
1
0
t.0
U
0
-10 JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG
950 METERS AT VOORI\G C
LLP FILTERED V COMPONENT
20 —
U
cr)
z
U
—10
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV
1650 METERS AT MOORING C
LLP FILTERED V COMPONENT
20 -
10
tvivItolk
-10
JUL
AUG
SEP
OCT
NOV
DEC
JAN
3950 METERS AT MOORING C
LLP FILTERED V COVPONENT
FEB
MAR
APR
MAY
3 8
3.7
3.6
3.5
3.2
3.1
3. 0 JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG
950 V ETERS AT MOORING C
LLP FILTERED TEMPERATURE
2.35 -
2.30 -
2.15-
2.10
r
1
1
1
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV
I
1650 METERS AT MOORING C
LLP FILTERED TEMPERATURE
I
I
1
60 -
. 55
50
. 45
.40
JUL
AUG
SEP
OCT
NOV
DEC
JAN
3950 VETERS AT MOORING C
LLP FILTERED TEMPERATURE
FEB
MAR
APR
MAY
980
975
970
I
965
it\ A
960
11/4\r`•Nritni\111
955
950
JUL
AUG
SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG
950 `D ETERS AT MOORING C
LLP FILTERED PRESSURE
1690
1685
1680
1675
1670
•
•
1665
1660
1655
JUL
AUG
SEP
FEB
MAR
APR
MAY
1650 VETERS AT MOORING C
LLP FILTERED PRESSURE
JUN
4080 4060 4040 4020 4000 3980 3960
JUL
AUG
SEP
OCT
NOV
DEC
JAN
3950 METERS AT VOORING C
LLP FILTERED PRESSURE
FEB
MAR
APR
MAY
UNFILTERED CURRENT. 950 M AT EMPEROR MOORING C.
100
10
X
0.
1
-3
-2
-1
0
1
FREQUENCY. CYCLES PER DAY
2
UNFILTERED CURRENT. 1650 M AT EMPEROR MOORING C.
1000 =
100 =
10 =
1
volisar
rvf
0.1 -3
1
-2
-1
0
1
FREQUENCY, CYCLES PER DAY
2
3
UNFILTERED CURRENT. 3950 M AT EMPEROR MOORING C.
100
10
0. 1
0. 01
-3
-2
-1
FREQUENCY. CYCLES PER DRY
108
UNFILTERED CURRENT. 950 M AT EMPEROR MOORING C.
100
10
0. 1
O. 01
95 PERCENT
I I I I I WI
0.001
0.01
O. 1
I I I I I 1111
1
I I I HMI
10
FREQUENCY. CYCLES PER DAT
I I I HMI
100
109
UNFILTERED CURRENT. 1650 M AT EMPEROR MOORING C.
W
0
WI
0.01 =
95 PERCENT
,MIIM.M•n•
mEw
NNW
0.
001
0. 01
I
1 t 111111
0. 1
I
1 1 111111
1
t, 1 111111
10
FREQUENCY. CYCLES PER DAT
I
1 1 111111
100
110
UNFILTERED CURRENT. 3950 M RT EMPEROR MOORING C.
100 =
10 =
•
O. 1 =
0.01 =
O. 001 =
95 PERCENT
0. 0001
0. 01
I
111111 4 1
0 . 1
4- 4411-1-4-14
1
4- 4
141-1-144
10
FREQUENCY, CYCLES PER DRY
I
I 11 1 4111
100
111
UNFILTERED TEMPERATURE. 950 M AT EMPEROR MOORING C.
O. 1 =
0. 00001 = 95 PERCENT
I t 1 111111
0. 000001
0.01
O. 1
I
1 11 h tit
1
t
t I I t I I I
10
FREQUENCY, CYCLES PER DAY
I
1 I 1 11111
100
112
UNFILTERED TEMPERATURE. 1650 M AT EMPEROR MOORING C.
0. 01 =
0.000001 =
95 PERCENT
0. 0000001
O. 01
0. 1
1
10
FREQUENCY. CYCLES PER DAT
100
113
UNFILTERED TEMPERATURE. 3950 M RT EMPEROR MOORING C.
O. 001 =
0.0000001
95 PERCENT
.40
0. 0 0 0 0 0 0 0 1
0.01
1
1 i 1 1 1111
0. 1
t
t 1 14-1+4
1
1 1 1 1 1111
10
FREQUENCY. CYCLES PER DAY
1
I I I mil
100
114
UNFILTERED PRESSURE. 950 M AT EMPEROR MOORING C.
100 =
0.01 =
95 PERCENT
0.001
0.01
1
11111111
O. 1
I
1
1
11111111
10
FREQUENCY. CYCLES PER DRY
1
11111111
100
115
UNFILTERED PRESSURE. 1650 11 AT EMPEROR MOORING C..
100 =
.1.
Oda
10=
.1.
.110
•••••
•
mew
4
0. 1 =
.1••
ORO
No,
=Ea
0.01 = Ono 1
One
••nnn•n
•
95 PERCENT
MOD
0.001 O. 01
0. 1
10
FREQUENCY. CYCLES PER DAY
100
116
UNFILTERED PRESSURE. 3950 M AT EMPEROR MOORING C.
100 =
10 =
1
I
O. 1 =
\i1111
0.01 =
O. 001
95 PERCENT
0.0001
0.01
1
1 1 1 1 1111
O. 1
1-
1 1 I 14444
1
1
1 1 1 1 1111
10
FREQUENCY, CYCLES PER DAY
1
1 1 1 1 1111
100