| Contributors | Affiliation | Role |
|---|---|---|
| Ku, Teh-Lung | University of Southern California (USC-HIMS) | Principal Investigator |
| Luo, Shangde | University of Southern California (USC-HIMS) | Co-Principal Investigator |
| Chandler, Cynthia L. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
MULVFS Thorium & Radium Isotope concentrations
See Platform deployments for cruise specific documentation
| Parameter | Description | Units |
| sta | station number from event log | |
| event | event number from event log | |
| cast | MULVFS cast number from event log | |
| lat | latitude from event log (minus=South) | degrees |
| lon | longitude from event log (minus=West) | degrees |
| depth | sample depth | meters |
| Th230 | thorium 230 | dpm/m^3 |
| Th230_err | thorium 230 analytical error (plus/minus the reported value) | dpm/m^3 |
| Th228 | thorium 228 | dpm/m^3 |
| Th228_err | thorium 228 analytical error (plus/minus the reported value) | dpm/m^3 |
| Ra226 | radium 226 | dpm/m^3 |
| Ra226_err | radium 226 analytical error (plus/minus the reported value) | dpm/m^3 |
| Ra228 | radium 228 | dpm/m^3 |
| Ra228_err | radium 228 analytical error (plus/minus the reported value) | dpm/m^3 |
| Dataset-specific Instrument Name | Multi Unit Large Volume Filtration System |
| Generic Instrument Name | Multiple Unit Large Volume Filtration System |
| Dataset-specific Description | Multiple Unit Large Volume in situ Filtration System(MULVFS) used to collect water. |
| Generic Instrument Description | The Multiple Unit Large Volume Filtration System (MULVFS) was first described in Bishop et al., 1985 (doi: 10.1021/ba-1985-0209.ch009). The MULVFS consists of multiple (commonly 12) specialized particulate matter pumps, mounted in a frame and tethered to the ship by a cable (Bishop et al., 1985; Bishop and Wood, 2008). The MULVFS filters particulates from large volumes of seawater, although the exact protocols followed will vary for each project. |
| Website | |
| Platform | R/V Thomas G. Thompson |
| Start Date | 1992-01-30 |
| End Date | 1992-03-13 |
| Description | Purpose: Spring Survey Cruise; 12°N-12°S at 140°W
TT007 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. Methods & Sampling PI: Teh-Lung Ku and Shangde Luo of: University of Southern California dataset: Thorium and Radium isotope concentrations dates: February 08, 1992 to March 07, 1992 location: N: 8.9933 S: -12.035 W: -140.9418 E: -135.0167 project/cruise: EqPac/TT007 - Spring Survey ship: Thomas Thompson |
| Website | |
| Platform | R/V Thomas G. Thompson |
| Start Date | 1992-08-05 |
| End Date | 1992-09-18 |
| Description | Purpose: Fall Survey; 12°N-12°S at 140°W
TT011 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. Methods & Sampling PI: Teh-Lung Ku and Shangde Luo of: University of Southern California dataset: Thorium and Radium isotope concentrations dates: August 13, 1992 to September 14, 1992 location: N: 4.9517 S: -11.8483 W: -140.4683 E: -134.9533 project/cruise: EqPac/TT011 - Fall Survey ship: Thomas Thompson PI note: Due to the ingrowth of Th228, the Ra data will not be reported (12/29/1994). |
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).