Deep sea sediment trap particle flux, amino acid and pigment data from U.S. JGOFS Sediment Traps from the Arabian Sea in 1995 (U.S. JGOFS Arabian Sea project)

Website: https://www.bco-dmo.org/dataset/2979
Data Type: Other Field Results
Version: September 03, 2002
Version Date: 2002-09-03

Project
» U.S. JGOFS Arabian Sea (Arabian Sea)

Program
» U.S. Joint Global Ocean Flux Study (U.S. JGOFS)
ContributorsAffiliationRole
Lee, CindyStony Brook University (SUNY Stony Brook)Principal Investigator
Hedges, JohnUniversity of Washington (UW)Co-Principal Investigator
Wakeham, StuartSkidaway Institute of Oceanography (SkIO)Co-Principal Investigator
Chandler, Cynthia L.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Deep sea sediment trap particle flux, amino acid and pigment data


Acquisition Description

See Platform deployments for cruise specific documentation

Note: MS-1, MS-2, MS-3, MS-4, MS-5 in published article are equivalent to J1, J2, J3, J4, J5 in the online data files

Honjo, S., J. Dymond, W. Prell, V. Ittekot. 1999. Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep Sea Research II. 46: 1859-1902


[ table of contents | back to top ]

Parameters

ParameterDescriptionUnits
siteArabian Sea site designation
mooringMooring identification
trap_typeWM= wide mouth particle interceptor (xs area 0.33 m2) NM= narrow mouth particle interceptor (xs area 0.017 m2) IRS=indented rotating sphere valve in line C=sample carousel in line NVC=No Valve (and no carousel) Control
deployDeployment number
depth_trapDepth of trap meters
date_beginDate of trap deployment YYYYMMDD
latLatitude decimal degrees
lonLongitude decimal degrees
carouselIdentification number of sample carousel on multi-trap arrays 1 = carousel #1 2 = carousel #2 3 = carousel #1 and #2 combined
cupSample cup number (position) in carousel
date_openDate sample cup opened YYYYMMDD
time_openTime sample cup opened hhmm
days_openElapsed time sample cup collected particle flux days
sampleUnique analytical ID# given to each sample
pm_fParticulate matter flux milligrams/m2/day
amino_fluxTotal hydrolyzed amino acid flux milligrams/m2/day
amino_C_fTotal hydrolyzed amino acid carbon flux micromol THAA C/m2/day
chl_a_fChlorophyll-a flux micrograms/m2/day
p_phorbide_fPhaeophorbide-a flux micrograms/m2/day
pp_phorbide_fPyrophaeophorbide-a flux micrograms/m2/day
p_phytin_fPhaeophytin-a flux micrograms/m2/day


[ table of contents | back to top ]

Instruments

Dataset-specific Instrument Name
IRS Sediment Trap
Generic Instrument Name
Sediment Trap - IRS
Generic Instrument Description
Sediment traps are specially designed containers deployed in the water column for periods of time to collect particles from the water column falling toward the sea floor. In general a sediment trap has a jar at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. The Indented Rotating Sphere (IRS) Sediment Trap is described in Peterson et al. (Field evaluation of a valved sediment trap. 1993. Limnology and Oceanography, 38, pp. 1741-1761 and Novel techniques for collection of sinking particles in the ocean and determining their settling rates. 2005. Limnology and Oceanography Methods 3, pp. 520-532). The IRS trap consists of four cylindrical modules; a particle interceptor, an IRS valve; a skewed funnel, and an eleven sample carousel (designated IRSC trap). The key to the trap design is the patented IRS valve located between the particle interceptor and particle accumulator portions of the trap. The valve and carousel are regulated by a TattleTale IVA (manufactured by Onset Computer Corp.) microprocessor and custom software. The IRS sediment trap was specifically designed to exclude zooplankton (Trull et al. 2008. Deep-Sea Research II v.55 pp. 1684-1695).


[ table of contents | back to top ]

Deployments

TT041

Website
Platform
R/V Thomas G. Thompson
Start Date
1994-10-28
End Date
1994-11-21
Description
Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.

TT047

Website
Platform
R/V Thomas G. Thompson
Start Date
1995-05-03
End Date
1995-05-22
Description
Sediment Trap Servicing, Coring, Process 3

Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.

TT055

Website
Platform
R/V Thomas G. Thompson
Start Date
1995-12-31
End Date
1996-01-16
Description
Sediment Trap Recovery

Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.

JGOFS_sedTrap_S1d1

Website
Platform
JGOFS Sediment Trap
Start Date
1994-11-11
End Date
1995-04-30
Description
U.S. JGOFS Arabian Sea Sediment Trap Mooring Latitude = 17.690 ° N Longitude = 57.852 ° E Note: MS-1, MS-2, MS-3, MS-4, MS-5 are equivalent to J1, J2, J3, J4, J5 in the data files Honjo, S., J. Dymond, W. Prell, V. Ittekot. 1999. Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep Sea Research II. 46: 1859-1902

Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.

JGOFS_sedTrap_S1d2

Website
Platform
JGOFS Sediment Trap
Start Date
1995-05-17
End Date
1995-12-24
Description
U.S. JGOFS Arabian Sea Sediment Trap Mooring Latitude = 17.690 ° N Longitude = 57.852 ° E Note: MS-1, MS-2, MS-3, MS-4, MS-5 are equivalent to J1, J2, J3, J4, J5 in the data files Honjo, S., J. Dymond, W. Prell, V. Ittekot. 1999. Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep Sea Research II. 46: 1859-1902

Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.

JGOFS_sedTrap_S3d1

Website
Platform
JGOFS Sediment Trap
Start Date
1994-11-11
End Date
1995-04-30
Description
U.S. JGOFS Arabian Sea Sediment Trap Mooring Latitude = 17.200° N Longitude = 59.600° E Note: MS-1, MS-2, MS-3, MS-4, MS-5 are equivalent to J1, J2, J3, J4, J5 in the data files Honjo, S., J. Dymond, W. Prell, V. Ittekot. 1999. Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep Sea Research II. 46: 1859-1902

Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.

JGOFS_sedTrap_S3d2

Website
Platform
JGOFS Sediment Trap
Start Date
1995-05-17
End Date
1995-12-24
Description
U.S. JGOFS Arabian Sea Sediment Trap Mooring Latitude = 17.200° N Longitude = 59.600° E Note: MS-1, MS-2, MS-3, MS-4, MS-5 are equivalent to J1, J2, J3, J4, J5 in the data files Honjo, S., J. Dymond, W. Prell, V. Ittekot. 1999. Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep Sea Research II. 46: 1859-1902

Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.

JGOFS_sedTrap_S4d1

Website
Platform
JGOFS Sediment Trap
Start Date
1994-11-11
End Date
1995-04-30
Description
U.S. JGOFS Arabian Sea Sediment Trap Mooring Latitude = 15.985° N Longitude = 61.500° E Note: MS-1, MS-2, MS-3, MS-4, MS-5 are equivalent to J1, J2, J3, J4, J5 in the data files Honjo, S., J. Dymond, W. Prell, V. Ittekot. 1999. Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep Sea Research II. 46: 1859-1902

Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.

JGOFS_sedTrap_S4d2

Website
Platform
JGOFS Sediment Trap
Start Date
1995-05-17
End Date
1995-12-24
Description
U.S. JGOFS Arabian Sea Sediment Trap Mooring Latitude = 15.985° N Longitude = 61.500° E Note: MS-1, MS-2, MS-3, MS-4, MS-5 are equivalent to J1, J2, J3, J4, J5 in the data files Honjo, S., J. Dymond, W. Prell, V. Ittekot. 1999. Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep Sea Research II. 46: 1859-1902

Acquisition Description
PI: Cindy Lee of: SUNY Stony Brook dataset: Deep sea sediment trap particle flux and amino acid and pigment data project/cruise: Arabian Sea set: TTN-041, serviced: TTN-047, recovered: TTN-055 ship: Thomas Thompson Organic geochemistry deep sea sediment trap particle flux and composition data Drs. Cindy Lee, Stuart Wakeham and John Hedges, principal investigators US JGOFS Arabian Sea 1994-1996 PI notes and methodology: Sediment trap arrays -------------------- 1. Organic geochemistry sediment trap arrays were deployed on the WHOI-OSU sediment trap moorings at 3 of the 5 mooring sites, 1, 3, and 4. See Honjo et al 1999 Monsoon-controlled export fluxes to the interior of the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography. 46, 1859-1902. 2. Arrays deployed during the winter monsoon consisted of 2 NM-IRSC traps, 1 WM-IRS trap, and 1 NVC trap. 3. Arrays deployed during the summer monsoon consisted of 1 NM-IRSC traps, 1 WM-IRSC trap, 1 NM-IRS trap, and 1 NVC trap. 4. Non-carousel traps (IRS and NVC traps) collected material from the time of deployment until the time of retrieval. 5. Closing date and time of each cup is the opening date and time of each succeeding cup. 6. The IRS valved sediment trap design is described in Peterson et al. 1993. Field evaluation of a valved sediment trap. Limnology and Oceanography, 38, 1741-1761. 7. Photographs of the IRS traps and actual ASPS deployments are available at http://boto.ocean.washington.edu/aog/traps/irs_traps.html Sample treatment ---------------- Samples were treated similarly to those described in Hernes et al 2000 (submitted DSR) with the exception that only HgCl2 was used to poison the samples. All sample splits were made using a McClean WSD-10 wet sample splitter. CHN analyses were done according to the method of Hedges and Stern, 1984. Carbon and Nitrogen determinations of carbonate containing solids. Limnology and Oceanography, 29, 657-663.


[ table of contents | back to top ]

Project Information

U.S. JGOFS Arabian Sea (Arabian Sea)


Coverage: Arabian Sea


The U.S. Arabian Sea Expedition which began in September 1994 and ended in January 1996, had three major components: a U.S. JGOFS Process Study, supported by the National Science Foundation (NSF); Forced Upper Ocean Dynamics, an Office of Naval Research (ONR) initiative; and shipboard and aircraft measurements supported by the National Aeronautics and Space Administration (NASA). The Expedition consisted of 17 cruises aboard the R/V Thomas Thompson, year-long moored deployments of five instrumented surface buoys and five sediment-trap arrays, aircraft overflights and satellite observations. Of the seventeen ship cruises, six were allocated to repeat process survey cruises, four to SeaSoar mapping cruises, six to mooring and benthic work, and a single calibration cruise which was essentially conducted in transit to the Arabian Sea.



[ table of contents | back to top ]

Program Information

U.S. Joint Global Ocean Flux Study (U.S. JGOFS)


Coverage: Global


The United States Joint Global Ocean Flux Study was a national component of international JGOFS and an integral part of global climate change research.

The U.S. launched the Joint Global Ocean Flux Study (JGOFS) in the late 1980s to study the ocean carbon cycle. An ambitious goal was set to understand the controls on the concentrations and fluxes of carbon and associated nutrients in the ocean. A new field of ocean biogeochemistry emerged with an emphasis on quality measurements of carbon system parameters and interdisciplinary field studies of the biological, chemical and physical process which control the ocean carbon cycle. As we studied ocean biogeochemistry, we learned that our simple views of carbon uptake and transport were severely limited, and a new "wave" of ocean science was born. U.S. JGOFS has been supported primarily by the U.S. National Science Foundation in collaboration with the National Oceanic and Atmospheric Administration, the National Aeronautics and Space Administration, the Department of Energy and the Office of Naval Research. U.S. JGOFS, ended in 2005 with the conclusion of the Synthesis and Modeling Project (SMP).



[ table of contents | back to top ]