HPLC measured pigments by size fraction from R/V Thomas G. Thompson TT053 cruise in the Arabian Sea in 1995 (U.S. JGOFS Arabian Sea project)

Website: https://www.bco-dmo.org/dataset/2563
Version: May 8, 2001
Version Date: 2001-05-08

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

Program
» U.S. Joint Global Ocean Flux Study (U.S. JGOFS)
ContributorsAffiliationRole
Bidigare, Robert R.University of HawaiiPrincipal Investigator
Chandler, Cynthia L.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

HPLC measured pigments by size fraction for selected stations


Acquisition Description

   PI:        Robert R. Bidigare
   of:        University of Hawaii
   dataset:   Pigment size fractions, HPLC method, from bottle casts
   dates:     November 02, 1995 to November 18, 1995 
   location:  N: 23.1289  S: 10.0871  W: 57.2737  E: 67.1208 
   cruise:    TTN-053, Arabian Sea Process cruise #6 (bio-optics)
   ship:      R/V Thomas Thompson
 
 
 
Robert Bidigare
University of Hawaii

Notes on Sampling Methodology

The distribution of pigments in different size fractions was investigated at the six long stations occupied during each cruise. Seawater samples were collected from fours depths: one in the mixed layer, and the other three above, within and below the deep chlorophyll maximum layer. Size-fractionated pigment samples were prepared by serially passing seawater (1-4 L) through 25 mm Gelman in-line filter holders equipped with filters of decreasing porosity. These included 18 and 2 micron Poretics polycarbonate filters, followed by a Whatman GF/F glass fiber filter (nominal porosity of 0.7 micron). Filters were wrapped in aluminum foil, immediately frozen in liquid nitrogen, shipped to Hawaii following each cruise, and stored at -80oC until HPLC analysis.

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Parameters

ParameterDescriptionUnits
eventevent number from event log
sta_stdArabian Sea standard station identifier
stastation number from event log
castCTD rosette cast number from event log
botCTD rosette bottle number
depth_nnominal depth meters
sizefracparticle size range (gt = greater than) microns
chlide_aChlorophyllide a nanogram/liter
chl_c3Chlorophyll c3 nanogram/liter
chl_cChlorophyll c1 + chlorophyll c2 + Mg 3,8 divinyl pheoporphyrin a5 nanogram/liter
peridininPeridinin nanogram/liter
fucox_but19'-Butanoyloxyfucoxanthin nanogram/liter
fucoxFucoxanthin nanogram/liter
fucox_hex19'-Hexanoyloxyfucoxanthin nanogram/liter
cis_fucoxCis-fucoxanthin nanogram/liter
cis_hexCis-19'-hexanoyloxyfucoxanthin nanogram/liter
prasinoxPrasinoxanthin nanogram/liter
violaxViolaxanthin nanogram/liter
diadinoxDiadinoxanthin nanogram/liter
alloxAlloxanthin nanogram/liter
diatoxDiatoxanthin nanogram/liter
luteinLutein nanogram/liter
zeaxZeaxanthin nanogram/liter
carotene_aalpha-carotene nanogram/liter
carotene_bbeta-carotene nanogram/liter
chl_b2Divinyl chlorophyll b nanogram/liter
chl_b1Monovinyl chlorophyll b nanogram/liter
chl_a2Divinyl chlorophyll a nanogram/liter
chl_a1Monovinyl chlorophyll a nanogram/liter
chl_b_totDivinyl chlorophyll b plus Monovinyl chlorophyll b nanogram/liter
chl_a_totDivinyl chlorophyll a plus Monovinyl chlorophyll a plus chlorophyllide a nanogram/liter


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Instruments

Dataset-specific Instrument Name
Niskin Bottle
Generic Instrument Name
Niskin bottle
Dataset-specific Description
CTD/Niskin Rosette bottles
Generic Instrument Description
A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.


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Deployments

TT053

Website
Platform
R/V Thomas G. Thompson
Start Date
1995-10-29
End Date
1995-11-26


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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.



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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).



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Funding

Funding SourceAward
National Science Foundation (NSF)

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