Dissolved and total dissolvable manganese concentration from R/V Thomas G. Thompson TT045 cruise in the Arabian Sea in 1995 (U.S. JGOFS Arabian Sea project)

Website: https://www.bco-dmo.org/dataset/2550
Version: March 13, 2002
Version Date: 2002-03-13

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

» U.S. Joint Global Ocean Flux Study (U.S. JGOFS)
Lewis, BrentUniversity of DelawarePrincipal Investigator
Luther, George W.University of DelawareCo-Principal Investigator
Chandler, Cynthia L.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Dataset Description

Dissolved and total dissolvable manganese concentrations from CTD casts

Acquisition Description

   PI:             Brent Lewis and George Luther
   of:             University of Delaware
   dataset:        Dissolved manganese concentrations from CTD casts
   dates:          March 15, 1995 to April 08, 1995
   location:       N: 22.4858  S: 9.9993  W: 58.0005  E: 68.7302
   project/cruise: Arabian Sea/TTN-045, Process cruise #2 (Spring Intermonsoon)
   ship:           R/V Thomas Thompson
   Lewis Note regarding 9/98 re-submission of data:
   Data for dissolved and total dissolvable Mn have been corrected to
   account for a prior error in calibration.  Current values have been
   verified by comparison to the NASS-4 SRM and by DDDC/APDC extraction
   with GFAAS analysis.

Processing Description

Brent Lewis notes and methods for manganese concentrations


    1. Dissolved manganese (Mn) concentrations are in nmoles/liter.

    2. Filtered (Mn_filt) samples were passed through a 0.45 micron
    membrane filter.

    3. Samples were acidified with Q-HCl to pH 

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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_nsample depth reported as pressure decibars
Mn_diss_lt0d45dissolved Mn conc. nanomoles/liter
Mn_unfilttotal dissolvable Mn conc. of unfiltered sample (dissolved plus particulate) nanomoles/liter

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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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R/V Thomas G. Thompson
Start Date
End Date

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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 SourceAward
National Science Foundation (NSF)

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