MOORED CURRENT METER OBSERVATIONS
EAST OF ABACO, THE BAHAMAS
("ACCP-1" ARRAY)

For the time period
6 February 1992 to 2 October 1993

by

Rainer J. Zantopp, Thomas N. Lee
and William E. Johns

Rosenstiel School of Marine and Atmospheric Science
University of Miami
4600 Rickenbacker Causeway
Miami, Florida 33149

Technical Report 96-001

Moored Current Meter Observations
East of Abaco, the Bahamas ("ACCP-1" Array)

Table of Contents

    Page
1. Introduction 1
2. Moored Array Configuration and Data Recovery1
3. Data Summary2
4. Acknowledgement3
5. References3
  Table 1: Deployment and Recovery Log5
  Table 2: Instrument Performance Table6
  Table 3: First Order Statistics for Mooring M296 (A)8
  Table 4: First Order Statistics for Mooring M297 (B)9
  Table 5: First Order Statistics for Mooring M298 (D)11
  Table 6: First Order Statistics for Mooring M299 (E)13
  Table 7: First Order Statistics for Mooring M300 (F)15
  Figures: [go to download postscript files] -

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Last revised: 4 March 1997
e-mail to: Rainer Zantopp

<Introduction

1. Introduction

This program to directly measure the volume and heat transport components of the thermohaline circulation in the western subtropical Atlantic at 26.5oN with a moored current meter array was initiated with joint support from NOAA ACCP and U.S. WOCE. It addresses the central issue of Element III of ACCP (observing and monitoring the thermohaline circulation) and of the WOCE Moored Velocity Measurement Program (direct flux sections).

This program also has the objective to preserve the continuity of western boundary current transport time series, begun by the STACS Program (Subtropical Atlantic Climate Studies) in 1986, to obtain multi-year records for the investigation of interannual variability of climate-relevant flow transients. The ACCP moored array has been designated as the U.S. WOCE western boundary current array for the subtropical Atlantic (ACM-1).

The purpose of this data report is to compile and present the moored current meter observations made east of Abaco, the Bahamas, at 26.5oN during the time period February 6, 1992 to October 2, 1993. Previous current meter deployments in this area, funded by NOAA and NSF within the framework of STACS, have been summarized in Zantopp et al. (1989a, 1989b, 1990, 1993), with scientific results published in Lee et al. (1990, 1996) and Fillenbaum et al. (1997).

2. Moored Array Configuration and Data Recovery

An array of five subsurface, taut-wire current meter moorings was deployed east of Abaco, the Bahamas, for a 20-month period from February 1992 to October 1993. The locations of the moorings are shown in Fig. 1 and Table 1, respectively. Instrument configuration and performance are shown in Fig. 2 and Table 2. First order statistics for all records are given in Tables 3, 4, 5, 6, and 7.

Malcolm Baldrige

All moorings were deployed from the NOAA vessel Malcolm Baldrige in February 1992 (Chief Scientist Dr. Tom Lee) and recovered by the same vessel in October 1993 (Chief Scientist Dr. William Johns).

All moorings had VACM instruments at the top (i.e. 100 m) level, Aanderaa current meters at the next two or three levels down (i.e. 400, 800 and 1200 m), and VACM instruments at 2000 m and deeper. All four deep moorings (M297 to M300) had an additional temperature logger at 200 m nominal depth, plus a CTD mounted on the anchor.

Data recovery and quality were somewhat worse than during previous deployments in this area, in particular, data losses occurred in the top 1000 m of all moorings. We believe this was due in part to enhanced mooring vibration caused by a different distribution of floatation. These changes were forced by non-availability of previously used float strings, causing us to use single-point syntactic floats instead. In summary, data recovery by parameter was as follows:

Parameter % of total
Moorings 100.0
Instruments 97.4
Pressure 87.3
Temperature 88.2
Speed 71.7
Direction 83.5
Salinity 99.1

All instruments were calibrated for direction, temperature and pressure before and after deployment by the Rosenstiel School of Marine and Atmospheric Science, Ocean Technology Group. The data tapes were read and transferred to the RSMAS VAX computer for editing and processing. Data editing included calibrations, spike removal, small gap filling, time step checking and correcting. Data processing included filtering in the time domain, using a 40-hour Lanczos filter to remove all variance with tidal periodicities. The attenuation of the semidiurnal tides is more than 105. The filtered data are then subsampled every 12 hours, at 00 and 12 UTC to form a low-frequency (subtidal) data set. The complete data set in unfiltered form is also available upon request. Current vectors are not rotated, so that the u-component is E/W, the v-component is N/S. The units are: cm/s for currents, oC for temperature, dbar for pressure, PSU for salinity.

3. Data Summary

First order statistics for each of the low-frequency records are given in Tables 3-7. Vertical excursions of the near surface instruments on the moorings were occasionally large due to strong currents, however root-mean-square excursions were less than 30 m for all moorings. None of the current or temperature records as presented in this report have been corrected for these mooring motion effects.

Time series of low-pass filtered current vectors for each mooring are shown in Figs. 3-11, pressures in Figs. 12-16, temperatures in Figs. 17-25, and u-components in Figs. 26-34, v-components in Figs. 35-43, current speeds in Figs. 44-52, and current directions in Figs. 53-61. Pressure, temperature and salinity for the bottom-mounted CTDs are shown in Figs. 62-64.

The typical mean flow east of the Bahamas is characterized by a northward flowing shallow current along the Bahama boundary, with a subsurface maximum near 400 m depth and vanishing to near zero around 1000 m depth. The waters below are flowing to the south and are associated with the Deep Western Boundary Current between 1500 and 4000 m. This deep current is usually found within 100 km east of the boundary, but meanders offshore at times.

A persistent shift of the DWBC core was observed during the previous deployment (WATTS) (Zantopp et al., 1993; Lee et al., 1996), indicated by the occurrence of northward flow at 2000 m (near the mean core depth) at mooring B, together with strong southward flow at mooring D as the southward core approaches this site. The offshore shift occurred in mid 1991 and continued for most of this ACCP-1 deployment (see figure on front cover). The cause of this long term shift and any connection to deep water production and transport are not understood at present.

4. Acknowledgement

The dedicated work of the officers and crew of the NOAA ship Malcolm Baldrige during the deployment and recovery cruises of this mooring array is deeply appreciated. Instrument and mooring preparation was carried out by the RSMAS Ocean Technology Group, under the direction of Phil Bedard. The hands-on assistance by graduate student Eve Fillenbaum is also acknowledged. Support for this current meter work was provided by NOAA through Atlantic Climate Change Program Grant NA37RJ0200.

5. References

Lee T.N., W. Johns, F. Schott and R. Zantopp (1990) Western boundary current structure and variability east of Abaco, Bahamas at 26.5oN. Journal of Physical Oceanography 20 (3), 446-466.

Lee T.N., W. Johns, R. Zantopp and E. Fillenbaum (1996) Moored observations of western boundary current variability and thermohaline circulation at 26.5oN in the subtropical North Atlantic. Journal of Physical Oceanography 26 (6), 962-983.

Fillenbaum E.R., T.N. Lee, W.E. Johns and R.J. Zantopp (1997) Meridional heat transport variability at 26.5oN in the North Atlantic. Journal of Physical Oceanography 27 (1), 153-174.

Zantopp R.J., T.N. Lee, W.E. Johns and E.J. Williams (1989) Moored current meter observations east of Abaco, Bahamas at 26.5o N (STACS-8 Array). University of Miami RSMAS Technical Report 89-001, March 1989, 6 pp.

Zantopp R.J., T.N. Lee and W.E. Johns (1989) Moored current meter observations east of Abaco, Bahamas at 26.5o N (STACS-7 Array). University of Miami RSMAS Technical Report 89-002, June 1989, 4 pp.

Zantopp R.J., T.N. Lee and W.E. Johns (1990) Moored current meter observations east of Abaco, Bahamas at 26.5o N (STACS-10 Array). University of Miami RSMAS Technical Report 90-002, September 1990, 10 pp.

Zantopp R.J., T.N. Lee and W.E. Johns (1993) Moored current meter observations east of Abaco, the Bahamas (WATTS Array). University of Miami RSMAS Technical Report 93-006, July 1993, 77 pp.

Contacts:

Thomas Lee
Bill Johns
Rainer Zantopp

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Table 1

Table 1:
ACCP-1 - Abaco-5 Array
Mooring Deployment and Recovery Log
Mooring Latitude Deployment Recovery
  Longitude Time Time
  Water Depth Vessel Vessel
296 26o 31.7' N 13 February 1992 28 September 1993
A 76o 51.0' W 15:38 GMT 11:43 GMT
  900 m Malcolm Baldrige Malcolm Baldrige
297 26o 29.1' N 11 February 1992 2 October 1993
B 76o 31.4' W 04:07 GMT 11:30 GMT
  4849 m Malcolm Baldrige Malcolm Baldrige
298 26o 29.4' N 9 February 1992 1 October 1993
D 75o 41.4' W 01:48 GMT 11:12 GMT
  4685 m Malcolm Baldrige Malcolm Baldrige
299 26o 29.9' N 9 February 1992 30 September 1993
E 73o 48.1' W 01:20 GMT 21:44 GMT
  5050 m Malcolm Baldrige Malcolm Baldrige
300 26o 29.2' N 6 February 1992 29 September 1993
F 71o 10.0' W 05:37 GMT 17:51 GMT
  5488 m Malcolm Baldrige Malcolm Baldrige

Table 2: ACCP-1 - Abaco-5 Array
Mooring and Instrument Performance Table

Instrument Type Serial Water Instr. Data Quality
I.D.   No. Depth Depth
M29601 VACM 672 900 100 f: dead battery
M29602 AACM 2262   400 g: clean
M29603 AACM 946   800 p: rotor failure
M29701 VACM 223 4849 100 p: dead battery; rotor failure
M29702 TDR 54   200 p: instrument destroyed by vibration
M29703 AACM 327   400 g: clean
M29704 AACM 3104   800 p: rotor failure
M29705 AACM 7681   1200 f: intermittant rotor failure
M29706 VACM 332   2000 g: clean
M29707 VACM 667   3000 g: clean
M29708 VACM 690   4000 g: clean
M29709 CTD 998   4840 g: clean
M29801 VACM 663 4685 100 p: dead battery; rotor failure
M29802 TDR 71   200 g: clean
M29803 AACM 2122   400 p: rotor failure
M29804 AACM 1005   800 f: clock problems, time gaps
M29805 AACM 7675   1200 g: clean
M29806 VACM 709   2000 f: bad thermistor
M29807 VACM 689   3000 f: dead battery
M29808 VACM 170   4000 g: clean
M29809 CTD 1000   4680 g: clean
M29901 VACM 699 5050 100 f: rotor failure
M29902 TDR 65   200 g: clean
M29903 AACM 473   400 p: dead battery; rotor failure
M29904 AACM 3620   800 f: bad compass
M29905 AACM 7676   1200 g: clean
M29906 VACM 710   2000 g: clean
M29907 VACM 669   3000 g: clean
M29908 VACM 694   4000 g: clean
M29909 CTD 1001   5045 g: clean
M30001 VACM 206 5488 100 p: dead battery; rotor failure
M30002 TDR 67   200 g: clean
M30003 AACM 1007   400 p: rotor failure
M30004 AACM 653   800 g: clean
M30005 AACM 1006   1200 g: clean
M30006 VACM 671   2000 g: clean
M30007 VACM 703   3000 g: clean
M30008 VACM 702   4000 g: clean
M30009 CTD 999   5483 g: clean

Instrument types
AACM Aanderaa current meter
VACM Vector averaging current meter
TDR Benthos temperature/depth recorder
CTD Seabird SEACAT CTD

Data quality
g: good complete time series without gaps and very few spikes
f: fair some small gaps or short periods of noise, one parameter failure
p: poor many gaps or noise periods, more than one parameter failure
n: no data complete instrument failure, no recoverable data availbale

Table 3:
ACCP-1 - Abaco-5 Array
First Order Statistics for Mooring M296 (A)
file variable begin - ends nobs mean std dev min. max.
M29601 P 920212 00 - 930404 00 835 75.6 10.3 63.0 169.9
T 920212 00 - 930404 00 835 24.7 1.5 21.7 28.1
U 920212 00 - 930404 00 835 6.4 12.4 -26.2 50.7
V 920212 00 - 930404 00 835 -0.7 30.8 -79.2 74.7
S 920212 00 - 930404 00 835 28.2 18.8 0.7 91.7
D 920212 00 - 930404 00 835 131.8 107.5 0.0 359.9
M29602 P 920212 00 - 930928 00 1189 383.8 13.9 372.0 454.8
T 920212 00 - 930928 00 1189 17.7 0.3 15.6 18.5
U 920212 00 - 930928 00 1189 13.0 14.3 -43.5 48.6
V 920212 00 - 930928 00 1189 60.7 47.5 -115.1 156.8
S 920212 00 - 930928 00 1189 70.2 37.2 0.8 160.7
D 920212 00 - 930928 00 1189 63.0 103.9 0.1 360.0
M29603 T 920212 00 - 930928 00 1189 8.9 0.7 7.1 12.3
U 920212 00 - 920710 12 300 2.0 4.8 -26.3 23.0
V 920212 00 - 920710 12 300 -5.4 12.3 -31.6 62.5
S 920212 00 - 920710 12 300 11.9 8.2 2.3 63.0
D 920212 00 - 930928 00 1189 181.4 85.2 0.2 359.8

Variable Measured Parameter Units
P Pressure dbar
T Temperature deg C
U East-West Current Component cm/s
V North-South Current Component cm/s
D Current Direction deg true
S Current Speed cm/s
Sal Salinity PSU

Table 4:
ACCP-1 - Abaco-5 Array
First Order Statistics for Mooring M297 (B)
file variable begin - ends nobs mean std dev min. max.
M29701 P 920211 12 - 920225 00 28 128.9 8.7 114.0 149.3
T 920211 12 - 920327 00 90 22.7 0.5 21.4 23.5
U 920211 12 - 920327 00 90 -0.1 21.9 -50.2 39.3
V 920211 12 - 920327 00 90 -21.6 13.8 -47.9 27.9
S 920211 12 - 920327 00 90 30.9 13.3 2.3 52.1
D 920211 12 - 920327 00 90 175.7 46.2 50.1 263.2
M29702 T 920211 12 - 920622 12 265 18.9 0.5 17.4 20.0
M29703 P 920211 12 - 931002 00 1198 418.4 26.7 385.5 595.4
T 920211 12 - 931002 00 1198 17.5 0.7 14.0 18.5
U 920211 12 - 931002 00 1198 0.0 12.6 -48.3 46.8
V 920211 12 - 931002 00 1198 13.2 14.2 -37.3 54.3
S 920211 12 - 931002 00 1198 19.5 12.4 0.3 58.9
D 920211 12 - 931002 00 1198 190.4 141.2 0.0 360.0
M29704 P 920211 12 - 931002 00 1198 823.6 25.0 800.2 1001.2
T 920211 12 - 931002 00 1198 9.1 0.8 5.6 11.1
U 920211 12 - 920321 12 79 -7.7 3.4 -15.1 -0.2
V 920211 12 - 920321 12 79 2.9 5.9 -8.3 19.3
S 920211 12 - 920321 12 79 9.9 3.9 3.1 21.7
D 920211 12 - 931002 00 1198 194.5 129.1 0.1 359.9
M29705 P 920211 12 - 931002 00 1198 1255.4 24.1 1238.7 1431.7
T 920211 12 - 931002 00 1198 4.8 0.2 4.0 5.3
U 920211 12 - 930521 00 816 -1.0 7.0 -18.1 30.6
V 920211 12 - 930521 00 816 -1.0 9.5 -27.4 25.7
S 920211 12 - 930521 00 816 10.4 5.7 0.1 33.8
D 920211 12 - 930521 00 816 184.6 101.3 1.1 360.0
M29706 T 920211 12 - 931002 00 1198 3.6 0.1 3.4 3.9
U 920211 12 - 931002 00 1198 -1.2 10.8 -25.7 41.9
V 920211 12 - 931002 00 1198 -0.2 13.8 -44.7 35.9
S 920211 12 - 931002 00 1198 14.9 9.3 0.5 45.6
D 920211 12 - 931002 00 1198 186.5 105.9 0.2 359.8
M29707 T 920211 12 - 931002 00 1198 3.0 0.1 2.7 3.2
U 920211 12 - 931002 00 1198 -0.6 8.3 -21.5 34.7
V 920211 12 - 931002 00 1198 2.2 10.9 -34.6 32.0
S 920211 12 - 931002 00 1198 11.9 7.3 0.1 39.7
D 920211 12 - 931002 00 1198 176.6 113.8 0.4 359.4
M29708 T 920211 12 - 931002 00 1198 2.4 0.0 2.3 2.5
U 920211 12 - 931002 00 1198 0.3 7.9 -25.1 25.4
V 920211 12 - 931002 00 1198 1.7 10.8 -25.0 30.5
S 920211 12 - 931002 00 1198 11.8 6.6 0.4 38.9
D 920211 12 - 931002 00 1198 168.0 109.7 0.2 359.9
M29709 P 920211 12 - 930925 12 1185 4927.1 0.2 4926.6 4927.8
T 920211 12 - 930925 12 1185 2.3 0.0 2.1 2.3
Sal 920211 12 - 930925 12 1185 34.8 0.0 34.7 34.9

Table 5:
ACCP-1 - Abaco-5 Array
First Order Statistics for Mooring M298 (D)
file variable begin - ends nobs mean std dev min. max.
M29801 P 920210 12 - 930415 12 861 154.6 47.2 123.0 423.4
T 920210 12 - 930415 12 861 21.5 1.2 16.4 23.9
U 920210 12 - 920518 12 197 7.8 17.4 -41.3 45.6
V 920210 12 - 920518 12 197 13.2 18.7 -24.4 61.8
S 920210 12 - 920518 12 197 25.7 14.9 4.4 66.9
D 920210 12 - 920518 12 197 129.2 110.8 0.4 359.6
M29802 T 920210 12 - 931001 00 1198 18.6 0.6 13.6 19.7
M29803 P 920211 00 - 931001 12 1164 448.0 47.8 417.4 759.5
T 921216 00 - 931001 12 547 17.4 1.0 11.1 18.4
U 920211 00 - 920215 12 10 -21.9 7.3 -29.7 -8.6
V 920211 00 - 920215 12 10 7.2 4.9 0.9 14.4
S 920211 00 - 920215 12 10 23.7 6.8 9.1 29.7
D 920211 00 - 931001 12 1198 164.1 102.5 0.6 359.8
M29804 P 920210 12 - 930419 12 656 865.2 47.2 836.4 1095.1
T 920210 12 - 930419 12 656 9.2 1.2 5.2 11.0
U 920210 12 - 930419 12 656 3.3 10.1 -17.3 33.4
V 920210 12 - 930419 12 656 -1.4 9.2 -19.7 35.5
S 920210 12 - 930419 12 656 12.3 7.0 0.2 38.7
D 920210 12 - 930419 12 656 166.4 95.2 4.7 358.6
M29805 P 920210 12 - 931001 00 1198 1265.5 38.9 1238.2 1502.2
T 920210 12 - 931001 00 1198 5.0 0.3 4.0 5.7
U 920210 12 - 931001 00 1198 2.8 10.8 -24.2 37.3
V 920210 12 - 931001 00 1198 -8.5 8.4 -36.8 26.4
S 920210 12 - 931001 00 1198 14.1 8.3 0.1 43.5
D 920210 12 - 931001 00 1198 166.6 62.2 1.5 354.1
M29806 U 920211 12 - 931002 00 1198 3.2 14.2 -32.8 38.6
V 920211 12 - 931002 00 1198 -11.4 11.4 -44.5 20.0
S 920211 12 - 931002 00 1198 19.3 9.9 0.9 50.8
D 920211 12 - 931002 00 1198 166.6 64.9 3.4 358.4
M29807 T 920210 12 - 921102 00 532 2.7 0.1 2.5 2.9
U 920210 12 - 921102 00 532 -0.7 15.6 -32.0 35.5
V 920210 12 - 921102 00 532 -12.2 11.0 -39.7 28.3
S 920210 12 - 921102 00 532 21.0 8.4 3.6 42.3
D 920210 12 - 921102 00 532 189.4 61.7 24.8 302.9
M29808 T 920210 12 - 931001 00 1198 2.3 0.0 2.2 2.4
U 920210 12 - 931001 00 1198 2.5 14.0 -37.6 38.0
V 920210 12 - 931001 00 1198 -8.9 11.2 -39.8 29.1
S 920210 12 - 931001 00 1198 18.5 8.1 0.5 41.7
D 920210 12 - 931001 00 1198 171.6 71.5 0.2 359.9
M29809 P 920210 12 - 930925 12 1187 4772.4 0.1 4772.1 4772.8
T 920210 12 - 930925 12 1187 2.2 0.0 2.1 2.4
Sal 920210 12 - 930925 12 1187 34.8 0.0 34.7 34.9

Table 6:
ACCP-1 - Abaco-5 Array
First Order Statistics for Mooring M299 (E)
file variable begin - ends nobs mean std dev min. max.
M29901 T 920209 12 - 930930 12 1199 21.0 1.0 18.6 23.9
U 920209 12 - 930520 00 932 -2.3 18.7 -60.5 59.9
V 920209 12 - 930520 00 932 2.5 18.0 -39.2 89.9
S 920209 12 - 930520 00 932 22.0 14.1 0.7 91.8
D 920209 12 - 930930 12 1199 192.9 104.8 0.8 359.8
M29902 T 920209 12 - 930930 12 1199 18.6 0.4 16.0 19.7
M29903 P 920209 00 - 930304 12 780 464.0 16.2 450.4 595.6
T 920209 00 - 930304 12 780 17.0 0.8 12.7 18.2
U 920209 00 - 920218 12 20 1.8 2.3 -1.6 6.8
V 920209 00 - 920218 12 20 -2.6 1.9 -6.1 2.0
S 920209 00 - 920218 12 20 3.9 1.8 0.4 7.5
D 920209 00 - 930304 12 780 202.5 97.3 0.3 360.0
M29904 P 920209 00 - 930930 12 1200 865.9 11.0 857.0 968.1
T 920209 00 - 930930 12 1200 9.3 0.9 6.2 11.7
S 920209 00 - 930930 12 1200 16.5 12.8 0.9 77.7
M29905 P 920209 00 - 930930 12 1200 1279.3 8.3 1273.0 1359.4
T 920209 00 - 930930 12 1200 5.1 0.3 4.3 5.9
U 920209 00 - 930930 12 1200 -0.2 10.0 -27.3 35.5
V 920209 00 - 930930 12 1200 5.2 8.0 -20.5 33.6
S 920209 00 - 930930 12 1200 12.3 6.3 0.3 36.9
D 920209 00 - 930930 12 1200 176.6 126.6 0.6 359.8
M29906 T 920209 12 - 930930 12 1199 3.6 0.1 3.1 3.8
U 920209 12 - 930930 12 1199 0.8 7.1 -25.1 27.7
V 920209 12 - 930930 12 1199 3.0 6.3 -16.9 28.3
S 920209 12 - 930930 12 1199 8.3 5.6 0.2 28.6
D 920209 12 - 930930 12 1199 160.4 119.8 0.0 358.7
M29907 T 920209 12 - 930930 12 1199 2.7 0.1 2.4 2.9
U 920209 12 - 930930 12 1199 1.9 5.5 -15.5 22.1
V 920209 12 - 930930 12 1199 1.5 4.1 -12.5 13.7
S 920209 12 - 930930 12 1199 5.9 4.3 0.1 25.1
D 920209 12 - 930930 12 1199 141.0 107.1 1.5 359.9
M29908 T 920209 12 - 930930 12 1199 2.3 0.0 2.2 2.3
U 920209 12 - 930930 12 1199 0.9 6.3 -15.5 21.0
V 920209 12 - 930930 12 1199 -0.9 4.1 -13.5 12.9
S 920209 12 - 930930 12 1199 6.1 4.6 0.2 22.7
D 920209 12 - 930930 12 1199 159.3 80.1 2.7 357.7
M29909 P 920209 12 - 930925 12 1189 4920.7 0.3 4919.7 4921.2
T 920209 12 - 930925 12 1189 2.2 0.0 2.1 2.3
Sal 920209 12 - 930925 12 1189 34.8 0.0 34.8 34.9

Table 7: First Order Statistics for Mooring M300 (F)
file variable begin - ends nobs mean std dev min. max.
M30001 T 920206 12 - 930216 00 752 21.9 0.9 19.7 23.8
U 920206 12 - 920818 12 389 -6.3 11.5 -38.8 25.5
V 920206 12 - 920818 12 389 -1.2 17.0 -58.4 43.3
S 920206 12 - 920818 12 389 17.2 12.8 0.2 60.6
D 920206 12 - 930216 00 752 216.3 100.3 0.0 359.0
M30002 T 920206 12 - 930929 12 1203 18.8 0.2 17.4 19.5
M30003 P 920206 12 - 930929 12 1203 402.8 5.4 393.1 447.0
T 920206 12 - 930929 00 1202 17.7 0.3 15.8 18.6
U 920204 00 - 920511 12 196 -3.9 5.0 -14.0 6.6
V 920204 00 - 920511 12 196 -3.5 8.6 -20.9 12.4
S 920204 00 - 920511 12 196 10.3 4.5 0.4 21.2
D 920204 00 - 931007 12 1224 216.2 99.9 0.4 359.3
M30004 P 920206 12 - 930929 12 1203 801.7 2.8 797.4 830.5
T 920206 12 - 930929 12 1203 10.2 0.7 8.9 12.2
U 920206 12 - 930929 12 1203 -2.5 3.5 -16.3 8.8
V 920206 12 - 930929 12 1203 0.5 5.1 -12.4 16.3
S 920206 12 - 930929 12 1203 5.9 3.1 0.0 17.5
D 920206 12 - 930929 12 1203 240.3 92.6 0.0 359.6
M30005 T 920206 12 - 930929 00 1202 5.5 0.2 5.2 5.9
U 920206 12 - 930929 00 1202 -1.9 5.1 -15.5 11.1
V 920206 12 - 930929 00 1202 0.5 5.4 -13.8 18.0
S 920206 12 - 930929 00 1202 6.5 4.0 0.3 19.0
D 920206 12 - 930929 00 1202 205.8 107.1 0.1 359.7
M30006 T 920207 00 - 930929 12 1202 3.7 0.1 3.5 3.9
U 920207 00 - 930929 12 1202 -0.7 3.4 -11.4 10.2
V 920207 00 - 930929 12 1202 0.0 4.4 -8.9 14.9
S 920207 00 - 930929 12 1202 5.0 2.6 0.1 15.4
D 920207 00 - 930929 12 1202 175.3 102.8 0.2 359.6
M30007 T 920206 12 - 930929 12 1203 2.7 0.0 2.6 2.8
U 920206 12 - 930929 12 1203 0.5 3.7 -10.0 13.3
V 920206 12 - 930929 12 1203 0.6 3.9 -10.7 12.1
S 920206 12 - 930929 12 1203 4.8 2.5 0.1 13.5
D 920206 12 - 930929 12 1203 164.2 104.5 0.4 359.7
M30008 T 920206 12 - 930929 12 1203 2.3 0.0 2.3 2.4
U 920206 12 - 930929 12 1203 0.3 4.3 -12.6 10.3
V 920206 12 - 930929 12 1203 1.2 4.4 -9.9 13.3
S 920206 12 - 930929 12 1203 5.5 3.0 0.4 13.7
D 920206 12 - 930929 12 1203 168.1 105.2 0.5 360.0
M30009 P 920206 12 - 930925 12 1195 5592.0 0.2 5591.7 5592.5
T 920206 12 - 930925 12 1195 2.1 0.0 2.0 2.3
Sal 920206 12 - 930925 12 1195 34.8 0.0 34.8 34.9


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Figures:

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Figure 1: Location of ACCP-1 current meter moorings east of Abaco, the Bahamas, February 1992 to October 1993.
Figure 2: Instrument distribution and serial numbers for ACCP-1 current meter moorings east of Abaco, the Bahamas, February 1992 to October 1993.
Figure 3: Vector stick plots of 40 hlp currents for mooring M296 (A), all levels. North is up.
Figure 4: Vector stick plots of 40 hlp currents for mooring M297 (B), at depths of 100, 400, 800, and 1200 m. North is up.
Figure 5: Vector stick plots of 40 hlp currents for mooring M297 (B), at depths of 1200, 2000, 3000, and 4000 m. North is up.
Figure 6: Vector stick plots of 40 hlp currents for mooring M298 (D), at depths of 100, 400, 800, and 1200 m. North is up.
Figure 7: Vector stick plots of 40 hlp currents for mooring M298 (D), at depths of 1200, 2000, 3000, and 4000 m. North is up.
Figure 8: Vector stick plots of 40 hlp currents for mooring M299 (E), at depths of 100, 400, and 1200 m. North is up.
Figure 9: Vector stick plots of 40 hlp currents for mooring M299 (E), at depths of 1200, 2000, 3000, and 4000 m. North is up.
Figure 10: Vector stick plots of 40 hlp currents for mooring M300 (F), at depths of 100, 400, 800, and 1200 m. North is up.
Figure 11: Vector stick plots of 40 hlp currents for mooring M300 (F), at depths of 1200, 2000, 3000, and 4000 m. North is up.
Figure 12: Time series of 40 hlp pressures for mooring M296 (A).
Figure 13: Time series of 40 hlp pressures for mooring M297 (B).
Figure 14: Time series of 40 hlp pressures for mooring M298 (D).
Figure 15: Time series of 40 hlp pressures for mooring M299 (E).
Figure 16: Time series of 40 hlp pressures for mooring M300 (F).
Figure 17: Time series of 40 hlp temperatures for mooring M296 (A), all levels.
Figure 18: Time series of 40 hlp temperatures for mooring M297 (B), at depths of 100, 200, 400, 800 and 1200 m.
Figure 19: Time series of 40 hlp temperatures for mooring M297 (B), at depths of 2000, 3000, 4000 m and bottom.
Figure 20: Time series of 40 hlp temperatures for mooring M298 (D), at depths of 100, 200, 400, 800 and 1200 m.
Figure 21: Time series of 40 hlp temperatures for mooring M298 (D), at depths of 3000, 4000 m and bottom.
Figure 22: Time series of 40 hlp temperatures for mooring M299 (E), at depths of 100, 200, 400, 800 and 1200 m.
Figure 23: Time series of 40 hlp temperatures for mooring M299 (E), at depths of 2000, 3000, 4000 m and bottom.
Figure 24: Time series of 40 hlp temperatures for mooring M300 (F), at depths of 100, 200, 400, 800 and 1200 m.
Figure 25: Time series of 40 hlp temperatures for mooring M300 (F), at depths of 2000, 3000, 4000 m and bottom.
Figure 26: Time series of 40 hlp u-components for mooring M296 (A), all levels.
Figure 27: Time series of 40 hlp u-components for mooring M297 (B), at depths of 100, 400, 800, and 1200 m.
Figure 28: Time series of 40 hlp u-components for mooring M297 (B), at depths of 1200, 2000, 3000, and 4000 m.
Figure 29: Time series of 40 hlp u-components for mooring M298 (D), at depths of 100, 400, 800, and 1200 m.
Figure 30: Time series of 40 hlp u-components for mooring M298 (D), at depths of 1200, 2000, 3000, and 4000 m.
Figure 31: Time series of 40 hlp u-components for mooring M299 (E), at depths of 100, 400, and 1200 m.
Figure 32: Time series of 40 hlp u-components for mooring M299 (E), at depths of 1200, 2000, 3000, and 4000 m.
Figure 33: Time series of 40 hlp u-components for mooring M300 (F), at depths of 100, 400, 800, and 1200 m.
Figure 34: Time series of 40 hlp u-components for mooring M300 (F), at depths of 1200, 2000, 3000, and 4000 m.
Figure 35: Time series of 40 hlp v-components for mooring M296 (A), all levels.
Figure 36: Time series of 40 hlp v-components for mooring M297 (B), at depths of 100, 400, 800, and 1200 m.
Figure 37: Time series of 40 hlp v-components for mooring M297 (B), at depths of 1200, 2000, 3000, and 4000 m.
Figure 38: Time series of 40 hlp v-components for mooring M298 (D), at depths of 100, 400, 800, and 1200 m.
Figure 39: Time series of 40 hlp v-components for mooring M298 (D), at depths of 1200, 2000, 3000, and 4000 m.
Figure 40: Time series of 40 hlp v-components for mooring M299 (E), at depths of 100, 400, and 1200 m.
Figure 41: Time series of 40 hlp v-components for mooring M299 (E), at depths of 1200, 2000, 3000, and 4000 m.
Figure 42: Time series of 40 hlp v-components for mooring M300 (F), at depths of 100, 400, 800, and 1200 m.
Figure 43: Time series of 40 hlp v-components for mooring M300 (F), at depths of 1200, 2000, 3000, and 4000 m.
Figure 44: Time series of 40 hlp current speeds for mooring M296 (A), all levels.
Figure 45: Time series of 40 hlp current speeds for mooring M297 (B), at depths of 100, 400, 800, and 1200 m.
Figure 46: Time series of 40 hlp current speeds for mooring M297 (B), at depths of 1200, 2000, 3000, and 4000 m.
Figure 47: Time series of 40 hlp current speeds for mooring M298 (D), at depths of 100, 400, 800, and 1200 m.
Figure 48: Time series of 40 hlp current speeds for mooring M298 (D), at depths of 1200, 2000, 3000, and 4000 m.
Figure 49: Time series of 40 hlp current speeds for mooring M299 (E), at depths of 100, 400, 800, and 1200 m.
Figure 50: Time series of 40 hlp current speeds for mooring M299 (E), at depths of 1200, 2000, 3000, and 4000 m.
Figure 51: Time series of 40 hlp current speeds for mooring M300 (F), at depths of 100, 400, 800, and 1200 m.
Figure 52: Time series of 40 hlp current speeds for mooring M300 (F), at depths of 1200, 2000, 3000, and 4000 m.
Figure 53: Time series of 40 hlp current directions for mooring M296 (A), all levels.
Figure 54: Time series of 40 hlp current directions for mooring M297 (B), at depths of 100, 400, 800, and 1200 m.
Figure 55: Time series of 40 hlp current directions for mooring M297 (B), at depths of 1200, 2000, 3000, and 4000 m.
Figure 56: Time series of 40 hlp current directions for mooring M298 (D), at depths of 100, 400, 800, and 1200 m.
Figure 57: Time series of 40 hlp current directions for mooring M298 (D), at depths of 1200, 2000, 3000, and 4000 m.
Figure 58: Time series of 40 hlp current directions for mooring M299 (E), at depths of 100, 400, and 1200 m.
Figure 59: Time series of 40 hlp current directions for mooring M299 (E), at depths of 1200, 2000, 3000, and 4000 m.
Figure 60: Time series of 40 hlp current directions for mooring M300 (F), at depths of 100, 400, 800, and 1200 m.
Figure 61: Time series of 40 hlp current directions for mooring M300 (F), at depths of 1200, 2000, 3000, and 4000 m.
Figure 62: Time series of 40 hlp pressures on bottom mounted CTDs at moorings 297, 298, 299, and 300.
Figure 63: Time series of 40 hlp temperatures on bottom mounted CTDs at moorings 297, 298, 299, and 300.
Figure 64: Time series of 40 hlp salinities on bottom mounted CTDs at moorings 297, 298, 299, and 300.

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Last revised: 4 March 1997
e-mail to: Rainer Zantopp

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