| Contributors | Affiliation | Role |
|---|---|---|
| Cowles, Timothy | Oregon State University (OSU) | Principal Investigator |
| Takahashi, Taro | Lamont-Doherty Earth Observatory (LDEO) | Principal Investigator |
| Barth, Jack | Oregon State University (OSU) | Co-Principal Investigator |
| Hales, Burke | Oregon State University (OSU) | Co-Principal Investigator |
| Richman, Jim | Oregon State University (OSU) | Co-Principal Investigator |
| Chandler, Cynthia L. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
SeaSoar CTD and Fluorometer
| Parameter | Description | Units |
| event | from cruise event log | MMDDhhmm |
| section_name | tow number | |
| date_begin | date sampling begins | YYYYMMDD |
| date_end | date sampling ends | YYYYMMDD |
| lat | latitude (- for South) | decimal degrees |
| lon | longitude (- for West) | decimal degrees |
| press | pressure | decibars |
| sal | salinity (PSS-78) | dimensionless |
| temp | in-situ temperature | degrees Celsius |
| sigma_t | sigma density (density at in-situ temperature) | kg/cubic meter |
| PAR | Photosynthetically Active Radiation | microEinsteins/m^2/second |
| O2_umol_kg | oxygen, dissolved | micromoles/kg seawater |
| pCO2_is | partial pressure of CO2 at the temperature reported in temp | microatmospheres |
| NO3_NO2_kg | nitrate plus nitrite concentration | micromoles/kg seawater |
| PO4_kg | phosphate | micromoles/kg seawater |
| SiO4_d | silicate depletion; difference between measured value and value in the deep water at the bottom of the cast | micromoles/kg seawater |
| chl_a_LPSS | chlorophyll-a concentration from fluorometry | micrograms/kg |
| yrday | Julian Day plus fractional day for reference: Jan 1 noon = 1.5 Jan 1 midnight = 2.0 | decimal days (UTC) |
| potemp | Potential Temperature | degrees C |
| sigma_0 | Sigma-Theta | kg / cubic meter |
| SVA | Specific Volume Anomaly | 1.0E-8 cubic meter / kg |
| fluor_1 | 1st Fluorometer, Chlorophyl_a | micro g / liter |
| fluor_2 | 2nd Fluorometer, Chlorophyl_a | micro g / liter |
| Dataset-specific Instrument Name | SeaSoar |
| Generic Instrument Name | SeaSoar |
| Dataset-specific Description | Lamont Pumping SeaSoar (LPSS) |
| Generic Instrument Description | Towed, undulating vehicle usually equipped with a VPR, TAPS, PAR, CTD |
| Website | |
| Platform | RVIB Nathaniel B. Palmer |
| Report | |
| Start Date | 1997-11-05 |
| End Date | 1997-12-13 |
| Description | Ross Sea Process Study 4
SeaWiFS transmits images to U.S. JGOFS scientists aboard the Palmer, for first time on November 23, 1997. Methods & Sampling PI: Taro Takahashi collaborators: S.C. Sutherland and Burke Hales of: Lamont-Doherty Earth Observatory dataset: Lamont Pumping SeaSoar (LPSS) CTD and Fluorometer data dates: November 25, 1997 to December 07, 1997 location: N: -76.4725 S: -76.7065 W: 169.6563 E: 172.4118 project/cruise: AESOPS/NBP-97-8 - Ross Sea Process Cruise 4 ship: R/V Nathaniel B. Palmer Sampling Methodology Note: "-9.900e+01" indicates no data |
| Website | |
| Platform | R/V Roger Revelle |
| Report | |
| Start Date | 1997-10-20 |
| End Date | 1997-11-24 |
| Description | Polar Front Survey I Methods & Sampling PI: Tim Cowles, Jack Barth, Jim Richman of: Oregon State University dataset: SeaSoar CTD and Fluorometer data, transit and mapping dates: October 20, 1997 to November 24, 1997 location: N: -58.0067 S: -62.3775 W: -171.948 E: -167.5941 project/cruise: Southern Ocean JGOFS/KIWI 6 - Polar Frontal Survey 1 ship: R/V Roger Revelle Sampling Methodology: SeaSoar CTD Observations During the Coastal Mixing and Optics Experiment: R/V Endeavor Cruises from 14-Aug to 1-Sep 1996 and 25-Apr to 15-May 1997. R. O'Malley, J.A. Barth, A. Erofeev, J. Fleischbein, P.M. Kosro and S.D. Pierce. College of Oceanic & Atmospheric Sciences, Oregon State University, Corvallis. Reference 98-1, Data Report 168, October 1998. Each file is a section intended to be at constant heading with the SeaSoar in tow. These are flat files, with data every 2-db in the vertical and every 2-km in the horizontal. The lat, lon, and yrday are the average values for the given column; each column runs from 1-db to 401-db at 2-db steps. The sections are numbered sequentialy (line01, line 02, etc) and the connecting lines are indicated as such (line01-02, etc). note: "nd" in a field represents no data present |
| Website | |
| Platform | R/V Roger Revelle |
| Report | |
| Start Date | 1998-01-08 |
| End Date | 1998-02-08 |
| Description | Polar Front Survey II Methods & Sampling PI: Tim Cowles and Jack Barth of: Oregon State University dataset: SeaSoar CTD and Fluorometer data, transit and mapping dates: January 08, 1998 to February 08, 1998 location: N: -57.0032 S: -67.7947 W: -171.9064 E: -169.3959 project/cruise: Southern Ocean JGOFS/KIWI 8 - Polar Frontal Survey 2 ship: R/V Roger Revelle Sampling Methodology: SeaSoar CTD Observations During the Coastal Mixing and Optics Experiment: R/V Endeavor Cruises from 14-Aug to 1-Sep 1996 and 25-Apr to 15-May 1997. R. O'Malley, J.A. Barth, A. Erofeev, J. Fleischbein, P.M. Kosro and S.D. Pierce. College of Oceanic & Atmospheric Sciences, Oregon State University, Corvallis. Reference 98-1, Data Report 168, October 1998. Each file is a section intended to be at constant heading with the SeaSoar in tow. These are flat files, with data every 2-db in the vertical and every 2-km in the horizontal. The lat, lon, and yrday are the average values for the given column; each column runs from 1-db to 401-db at 2-db steps. The sections are numbered sequentialy (line01, line 02, etc) and the connecting lines are indicated as such (line01-02, etc). note: "nd" in a field represents no data present |
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).