| Contributors | Affiliation | Role |
|---|---|---|
| Anderson, Robert F. | Lamont-Doherty Earth Observatory (LDEO) | Principal Investigator |
| Sayles, Frederick | Woods Hole Oceanographic Institution (WHOI) | Principal Investigator |
| Martin, William | Woods Hole Oceanographic Institution (WHOI) | Co-Principal Investigator |
| Chandler, Cynthia L. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
Sediment composition
| Parameter | Description | Units |
| event | event number from event log | |
| sta | station number from event log | |
| lat | latitude, minus value means South | decimal degrees |
| lon | longitude, minus value means West | decimal degrees |
| core_type | type of coring instrument used, where GC = gravity core where MC = multi core | |
| depth_w | water depth | meters |
| depth_core | depth in core, mid-point of interval sampled | centimeters |
| depth_core_sd | depth in core, standard deviation | centimeters |
| CaCO3 | calcium carbonate, weight percent | percent |
| Si_opal | opal, weight percent | percent |
| Si_opal_dup | opal, duplicate analysis, weight percent | percent |
| site | sediment trap mooring number | |
| deploy_id | type of sampling device: MC=MultiCorer WHIMP=Woods Hole Interstitial Marine Probe | |
| porosity | volume of pore water per volume of wet sediment | |
| C_org | average weight percent of organic carbon | percent |
| C_org_sd | standard deviation of replicates | percent |
| biog_tot | Si_opal + CaCO3 + 2.8*C_org | percent |
| detrital | 100 - biol_tot | percent |
| Pb210xs | excess Pb210 activity | dpm/gram |
| Pb210xs_sd | uncertainty in Pb210xs | dpm/gram |
| Th234xs | excess Th234 activity | dpm/gram |
| Th234xs_sd | uncertainty in Th234xs | dpm/gram |
| Dataset-specific Instrument Name | Gravity Corer |
| Generic Instrument Name | Gravity Corer |
| Generic Instrument Description | The gravity corer allows researchers to sample sediment layers at the bottom of lakes or oceans. The coring device is deployed from the ship and gravity carries it to the seafloor. (http://www.whoi.edu/instruments/viewInstrument.do?id=1079). |
| Dataset-specific Instrument Name | Multi Corer |
| Generic Instrument Name | Multi Corer |
| Generic Instrument Description | The Multi Corer is a benthic coring device used to collect multiple, simultaneous, undisturbed sediment/water samples from the seafloor. Multiple coring tubes with varying sampling capacity depending on tube dimensions are mounted in a frame designed to sample the deep ocean seafloor. For more information, see Barnett et al. (1984) in Oceanologica Acta, 7, pp. 399-408. |
| Website | |
| Platform | RVIB Nathaniel B. Palmer |
| Report | |
| Start Date | 1996-08-30 |
| End Date | 1996-09-24 |
| Description | Site Survey Cruise Methods & Sampling PI: Bob Anderson of: Lamont-Doherty Earth Observatory dataset: Sediment composition dates: September 07, 1996 to September 17, 1996 location: N: -56.9097 S: -63.8833 W: -170.1755 E: -169.2333 project/cruise: AESOPS/NBP96-4 ship: R/V Nathaniel B. Palmer Notes: CaCO3 measured by coulometry. Opal measured by alkaline leach and spectrophotometry. The concentrations reported are for biogenic opal, which includes 11% by weight water (SiO2*0.4H2O). Reference: Mortlock R.A., Froelich P.N., 1989. A simple method for the rapid determination of biogenic opal in pelagic marine sediments. Deep-Sea Research 36, 1415-1426. |
| Website | |
| Platform | RVIB Nathaniel B. Palmer |
| Report | |
| Start Date | 1998-02-25 |
| End Date | 1998-04-03 |
| Description | Benthic Process and Moorings Recovery Methods & Sampling PI: Fred Sayles and William Martin of: Woods Hole Oceanographic Institution data set: Sediment composition dates: February 26, 1998 to March 21, 1998 location: N: -56.8817 S: -76.4992 W: -178.107 E: -169.6252 project/cruise: AESOPS NBP98-2, Benthic Process and Mooring Recovery Cruise ship: R/V Nathaniel B. Palmer Sampling Methodology |
The U.S. Southern Ocean JGOFS program, called Antarctic Environment and Southern Ocean Process Study (AESOPS), began in August 1996 and continued through March 1998. The U.S. JGOFS AESOPS program focused on two regions in the Southern Ocean: an east/west section of the Ross-Sea continental shelf along 76.5°S, and a second north/south section of the Southern Ocean spanning the Antarctic Circumpolar Current (ACC) at ~170°W (identified as the Polar Front). The science program, coordinated by Antarctic Support Associates (ASA), comprised eleven cruises using the R.V.I.B Nathaniel B. Palmer and R/V Roger Revelle as observational platforms and for deployment and recovery of instrumented moorings and sediment-trap arrays. The Ross-Sea region was occupied on six occasions and the Polar Front five times. Mapping data were obtained from SeaSoar, ADCP, and bathymetric systems. Satellite coverage was provided by the NASA SeaWiFS and the NOAA/NASA Pathfinder programs.
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).