Table of Contents

• Dataset Description
  • Methods & Sampling
• Data Files
• Parameters
• Instruments
• Deployments
• Project Information
• Program Information
• Funding

Particulate matter concentration from filtered Niskin Bottles

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.
 

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).

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).