Particulate matter concentration from filtered Niskin Bottles from R/V Atlantis II cruise AII-119-4 in the North Atlantic in 1989 (U.S. JGOFS NABE project)

Website: https://www.bco-dmo.org/dataset/2601
Version: January 14, 2003
Version Date: 2003-01-14

Project
» U.S. JGOFS North Atlantic Bloom Experiment (NABE)

Program
» U.S. Joint Global Ocean Flux Study (U.S. JGOFS)
ContributorsAffiliationRole
Gardner, Wilford D.Texas A&M University (TAMU)Principal Investigator
Richardson, Mary JoTexas A&M University (TAMU)Co-Principal Investigator
Walsh, IanTexas A&M University (TAMU)Co-Principal Investigator
Chandler, Cynthia L.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Particulate matter concentration from filtered Niskin Bottles


Methods & Sampling

PI:              Wilford Gardner
of:              Texas A & M University
dataset:         Particulate matter concentration from filtered Niskin Bottles
dates:           April 20, 1989 to May 10, 1989
location:        N: 59.7418  S: 41.104  W: -23.022  E: -19.0205
project/cruise:  North Atlantic Bloom Experiment/Atlantis II 119, leg 4
ship:            R/V Atlantis II
 
Methodology
See:  Gardner, W.D., I.D. Walsh, and M.J. Richardson, 1993.  Biophysical forcing of
particle production and distribution during a spring bloom in the North Atlantic.
Deep-Sea Research II, Vol. 40, No. 1/2, pp. 171-195
 
PI-Notes:
Only stations at 47N (stations 11-23) were used in PMC vs Beam Cp calculations.
Dregs means the water below the spigot was sampled on a separate filter.
MP means a Millipore filter funnel was used to filter the water rather than
in-line filtration because of the high concentrations.
 
The Dregs Concentration is the mass filtered from below the bottle spigots divided
by the volume of the water filtered from below the spigots, so it includes the
particles in the water at the time the bottle was closed.  It is assumed that the
excess particles below the spigots were distributed throughout the bottle at the time
of closure (probably in the form of aggregates).  The measured volume of the water
bottles used in NABE was 29.6 liters.
 

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Data Files

File
pmc.csv
(Comma Separated Values (.csv), 6.70 KB)
MD5:10e0faa2ee439513cc8b06cde04f22b6
Primary data file for dataset ID 2601

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Parameters

ParameterDescriptionUnits
yearyear (as YYYY) YYYY
eventevent number, from event log MMDDhhmm
stastation number from event log dimensionless
castcast/operation number, numbered consecutively within station dimensionless
botrosette bottle number dimensionless
presssample depth reported as pressure decibars
PMC_kg_vol_filtvolume filtered (reported as mass) kilograms
PMC_kgparticulate matter concentration micrograms/kilogram
dregs_massweight of particulates in dregs volume filtered micrograms
dregs_vol_filtdregs volume filtered liters
dregs_corr_concdregs corrected concentration micrograms/liter
dregs_corr_factdregs correction factor dimensionless
commentsindicates if a dregs sample was collected free text


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Instruments

Dataset-specific Instrument Name
Niskin Bottle
Generic Instrument Name
Niskin bottle
Dataset-specific Description
Niskin Rosette bottles were used to collect the water samples.
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

AII-119-4

Website
Platform
R/V Atlantis II
Start Date
1989-04-17
End Date
1989-05-11
Description
early bloom cruise; 17 locations; 60N 21W to 46N 18W


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Project Information

U.S. JGOFS North Atlantic Bloom Experiment (NABE)


Coverage: North Atlantic


One of the first major activities of JGOFS was a multinational pilot project, North Atlantic Bloom Experiment (NABE), carried out along longitude 20° West in 1989 through 1991. The United States participated in 1989 only, with the April deployment of two sediment trap arrays at 48° and 34° North. Three process-oriented cruises where conducted, April through July 1989, from R/V Atlantis II and R/V Endeavor focusing on sites at 46° and 59° North. Coordination of the NABE process-study cruises was supported by NSF-OCE award # 8814229. Ancillary sea surface mapping and AXBT profiling data were collected from NASA's P3 aircraft for a series of one day flights, April through June 1989.

A detailed description of NABE and the initial synthesis of the complete program data collection efforts appear in: Topical Studies in Oceanography, JGOFS: The North Atlantic Bloom Experiment (1993), Deep-Sea Research II, Volume 40 No. 1/2.

The U.S. JGOFS Data management office compiled a preliminary NABE data report of U.S. activities: Slagle, R. and G. Heimerdinger, 1991. U.S. Joint Global Ocean Flux Study, North Atlantic Bloom Experiment, Process Study Data Report P-1, April-July 1989. NODC/U.S. JGOFS Data Management Office, Woods Hole Oceanographic Institution, 315 pp. (out of print).



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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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