| Contributors | Affiliation | Role |
|---|---|---|
| Olson, Robert | Woods Hole Oceanographic Institution (WHOI) | Principal Investigator |
| Sosik, Heidi M. | Woods Hole Oceanographic Institution (WHOI) | Co-Principal Investigator |
| Chandler, Cynthia L. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
PI: Rob Olson and Heidi Sosik of: Woods Hole Oceanographic Institution dataset: Fast Repetition Rate Fluorometry from CTD casts dates: February 14, 1998 to March 15, 1998 location: N: -49.9867 S: -71.3157 W: -178.826 E: -165.9145 project/cruise: AESOPS/KIWI9 - APFZ Polar Front Process 2 cruise ship: R/V Roger Revelle Sampling Methodology
| File |
|---|
FRRFluorometry.csv (Comma Separated Values (.csv), 85.85 KB) MD5:bb1b989c2b2ef93bf7a430d404fc83ee Primary data file for dataset ID 2779 |
| Parameter | Description | Units |
| event | event number from event log | |
| sta | station number from event log | |
| cast | cast number | |
| depth | depth in the water column | meters |
| Fo | initial value of chlorophyll fluorescence yield before light saturation | relative |
| Fm | final value of chlorophyll fluorescence yield after saturation of photosynthetic reaction centers | relative |
| Fv_Fm_ratio | normalized variable fluorescence, equivalent to (Fm-Fo)/Fm | dimensionless |
| sigma_PSII | photosystem II (PSII) functional absorption cross-section | angstrom^2 |
| tau_PSII | photosystem II turnover time | microseconds |
| Dataset-specific Instrument Name | Fluorometer |
| Generic Instrument Name | Fluorometer |
| Dataset-specific Description | A battery-powered FRR fluorometer with internal data logging (Chelsea Instruments, Ltd. FASTtracka) was used to measure FRR fluorometer data. |
| Generic Instrument Description | A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ. |
| Dataset-specific Instrument Name | Niskin Bottle |
| Generic Instrument Name | Niskin bottle |
| Dataset-specific Description | CTD clean rosette (Niskin) bottles were used to collect water samples. |
| 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. |
| Website | |
| Platform | R/V Roger Revelle |
| Report | |
| Start Date | 1998-02-13 |
| End Date | 1998-03-19 |
| Description | Polar Front Process II. Additional information about this cruise can be found at https://usjgofs.whoi.edu/aesops/aboutrr9.html |
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).