|Lewis, Brent||University of Delaware||Principal Investigator|
|Luther, George W.||University of Delaware||Co-Principal Investigator|
|Chandler, Cynthia L.||Woods Hole Oceanographic Institution (WHOI BCO-DMO)||BCO-DMO Data Manager|
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.
Brent Lewis notes and methods for manganese concentrations Notes: 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
|event||event number from event log|
|sta_std||Arabian Sea standard station identifier|
|sta||station number from event log|
|cast||CTD rosette cast number from event log|
|bot||CTD rosette bottle number|
|depth_n||sample depth reported as pressure||decibars|
|Mn_diss_lt0d45||dissolved Mn conc.||nanomoles/liter|
|Mn_unfilt||total dissolvable Mn conc. of unfiltered sample (dissolved plus particulate)||nanomoles/liter|
|Dataset-specific Instrument Name|| |
|Generic Instrument Name|| |
|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.
R/V Thomas G. Thompson
|Start Date|| |
|End Date|| |
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.
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)|