|McGillicuddy, Dennis J.||Woods Hole Oceanographic Institution (WHOI)||Principal Investigator|
|Chandler, Cynthia L.||Woods Hole Oceanographic Institution (WHOI BCO-DMO)||BCO-DMO Data Manager|
PI: Dennis McGillicuddy of: Woods Hole Oceanographic Institution dataset: XBT data dates: May 16, 1989 to May 22, 1989 location: N: 46.68 S: 42 W: -22.4 E: -17.75 project/cruise: North Atlantic Bloom Experiment/Atlantis II 119, leg 5 ship: Atlantis II Processing comments Dennis McGillicuddy, Harvard University
It is our experience that the actual drop rate of T-7 XBTs is about 6 percent faster than accounted for by the Sippican drop rate equation. We therefore applied a uniform stretch to each profile of 1.065. Intercomparison of an XBT profile (station 10) with the nearest CTD station showed similar structure but substantial offset (1.2 degrees)." A 1.2 degree adjustment (added) has been applied to each XBT.
|xbt_num||originator assigned castprofile number|
|date||date reported as YYYYMMDD|
|time||time reported as HHMM|
|lat||latitude, negative values denote South||decimal degrees|
|lon||longitude, negative values denote West||decimal degrees|
|temp||water temperature, Centigrade||degrees Celsius|
|Dataset-specific Instrument Name|| |
|Generic Instrument Name|| |
|Generic Instrument Description|| |
An XBT is an expendable free-fall temperature probe that provides a profile of measured temperature against depth calculated from a fall-rate model. For example, two popular XBT models are the T-5 and T-7 probes from Sippican. More information is available from Lockheed Martin Sippican at URL: http://www.sippican.com/.
R/V Atlantis II
|Start Date|| |
|End Date|| |
late bloom cruise; 31 locations; 61N 22W to 41N 17W
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).
|National Science Foundation (NSF)|