Contributors | Affiliation | Role |
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Anderson, Robert F. | Lamont-Doherty Earth Observatory (LDEO) | Principal Investigator |
Chandler, Cynthia L. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
PI: Bob Anderson of: Lamont-Doherty Earth Observatory dataset: radionuclides, GoFlo water bottle samples dates: November 02, 1992 to December 07, 1992 location: N: 8.9433 S: -11.9598 W: -140.1463 E: -134.9498 project/cruise: EqPac/TT013, Benthic survey ship: R/V Thomas Thompson Methodology Notes: The principal investigator has arranged the data to display vertical profiles at nominal geographic station locations. The composite profiles have been assembled from two or more casts within a given station/location and an individual sample can be a composite drawn from two or more bottles.
File |
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rad_GoFlo.csv (Comma Separated Values (.csv), 3.57 KB) MD5:783be082413ea4d328cc56ef6da54b87 Primary data file for dataset ID 2696 |
Parameter | Description | Units |
sta_name | station name | |
lat_n | latitude, nominal; minus means South | degrees |
lon_n | longitude, nominal; minus means West | degrees |
event | event number from event log | |
sta | station number from event log | |
cast | cast number, GoFlo bottle cast | |
bots | composite sample drawn from two or more bottles | |
depth_n | depth, nominal; average depth of bottles in composite sample | meters |
Th232_tot | thorium-232 total, dissolved and particulate | dpm/1000 liters |
Th232_err | thorium-232 error, plus/minus one sigma | dpm/1000 liters |
Th230_tot | thorium-230 total, dissolved and particulate | dpm/1000 liters |
Th230_err | thorium-230 error, plus/minus one sigma | dpm/1000 liters |
Pa231_tot | protactinium-231 total, dissolved and particulate | dpm/1000 liters |
Pa231_err | protactinium-231 error, plus/minus one sigma | dpm/1000 liters |
Be10_tot | beryllium-10 total, dissolved and particulate | atoms/kilogram |
Be10_err | beryllium-10 error, plus/minus one sigma | atoms/kilogram |
Dataset-specific Instrument Name | Go-flo Bottle |
Generic Instrument Name | GO-FLO Bottle |
Dataset-specific Description | GoFlo bottles used to collect water samples |
Generic Instrument Description | GO-FLO bottle cast used to collect water samples for pigment, nutrient, plankton, etc. The GO-FLO sampling bottle is specially designed to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths. |
Dataset-specific Instrument Name | Thermal Ionization Mass Spectrometry |
Generic Instrument Name | Thermal Ionization Mass Spectrometer |
Dataset-specific Description | Thermal Ionization mass spectrometry used to measure thorium isotopes and Pa-231 |
Generic Instrument Description | A Thermal Ionization Mass Spectrometer (TIMS) is an instrument that measures isotopic ratios after electrical excitation of a sample causes ionization of the isotopes. |
Website | |
Platform | R/V Thomas G. Thompson |
Start Date | 1992-10-30 |
End Date | 1992-12-13 |
Description | Purpose: Benthic Survey, 12°N-12°S at 140°W
TT013 was one of five cruises conducted in 1992 in support of the U.S. Equatorial Pacific (EqPac) Process Study. The five EqPac cruises aboard R/V Thomas G. Thompson included two repeat meridional sections (12°N - 12°S), 2 equatorial surveys, and a benthic survey (all at 140° W). The scientific objectives of this study were to observe the processes in the Equatorial Pacific controlling the fluxes of carbon and related elements between the atmosphere, euphotic zone, and deep ocean. As luck would have it, the survey window coincided with an El Nino event. A bonus for the research team. |
The U.S. EqPac process study consisted of repeat meridional sections (12°N -12°S) across the equator in the central and eastern equatorial Pacific from 95°W to 170°W during 1992. The major scientific program was focused at 140° W consisting of two meridional surveys, two equatorial surveys, and a benthic survey aboard the R/V Thomas Thompson. Long-term deployments of current meter and sediment trap arrays augmented the survey cruises. NOAA conducted boreal spring and fall sections east and west of 140°W from the R/V Baldridge and R/V Discoverer. Meteorological and sea surface observations were obtained from NOAA's in place TOGA-TAO buoy network.
The scientific objectives of this study were to determine the fluxes of carbon and related elements, and the processes controlling these fluxes between the Equatorial Pacific euphotic zone and the atmosphere and deep ocean. A broad overview of the program at the 140°W site is given by Murray et al. (Oceanography, 5: 134-142, 1992). A full description of the Equatorial Pacific Process Study, including the international context and the scientific results, appears in a series of Deep-Sea Research Part II special volumes:
Topical Studies in Oceanography, A U.S. JGOFS Process Study in the Equatorial Pacific (1995), Deep-Sea Research Part II, Volume 42, No. 2/3.
Topical Studies in Oceanography, A U.S. JGOFS Process Study in the Equatorial Pacific. Part 2 (1996), Deep-Sea Research Part II, Volume 43, No. 4/6.
Topical Studies in Oceanography, A U.S. JGOFS Process Study in the Equatorial Pacific (1997), Deep-Sea Research Part II, Volume 44, No. 9/10.
Topical Studies in Oceanography, The Equatorial Pacific JGOFS Synthesis (2002), Deep-Sea Research Part II, Volume 49, Nos. 13/14.
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).