Contributors | Affiliation | Role |
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Broenkow, William | Moss Landing Marine Laboratories (MLML) | Principal Investigator |
Chandler, Cynthia L. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
Longtrack near-surface observations
PI: William Broenkow of: Moss Landing Marine Laboratories dataset: longtrack near-surface observations, Moss Landing dates: April 18, 1989 to June 07, 1989 location: N: 63.675 S: 38.667 W: -24.468 E: -17.642 project/cruise: North Atlantic Bloom Experiment cruises Ref: JGOFS North Atlantic Bloom long track and vertical profiling results. W.W. Broeknow, R.E. Reaves and M.A. Yarbrough MLML Tech Pub 90-1
Parameter | Description | Units |
year | year as YYYY | dimensionless |
cruise | cruise designation | dimensionless |
leg | leg of cruise (4 or 5) | dimensionless |
lat | Latitude | decimal degrees |
lon | Longitude | decimal degrees |
date | Date | yyyymmdd |
time | Time of day | GMT decimal hours |
yrday | Day of Year, 1989, assigned by U.S.JGOFS DMO, Jan 1 noon = 1.5 | decimal day of year |
sal | Salinity | PSU |
temp | Temperature | degrees C |
fluor | Rescaled Fluorescence 685 nm | approx. mg/m^3 chlorophyll |
par_Ei | Incident PAR 400-700 nm Irradiance | umole/sec/m^2 |
par_Eo | Incubator PAR Scalar Irradiance | umole/sec/m^2 |
Dataset-specific Instrument Name | Fluorometer |
Generic Instrument Name | Fluorometer |
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 | LiCor Underwater Spectrial Quantum Sensor |
Generic Instrument Name | LI-COR LI-193 PAR Sensor |
Generic Instrument Description | The LI-193 Underwater Spherical Quantum Sensor uses a Silicon Photodiode and glass filters encased in a waterproof housing to measure PAR (in the 400 to 700 nm waveband) in aquatic environments. Typical output is in micromol s-1 m-2. The LI-193 Sensor gives an added dimension to underwater PAR measurements as it measures photon flux from all directions. This measurement is referred to as Photosynthetic Photon Flux Fluence Rate (PPFFR) or Quantum Scalar Irradiance. This is important, for example, when studying phytoplankton, which utilize radiation from all directions for photosynthesis. LI-COR began producing Spherical Quantum Sensors in 1979; serial numbers for the LI-193 begin with SPQA-XXXXX (licor.com). |
Website | |
Platform | R/V Atlantis II |
Start Date | 1989-04-17 |
End Date | 1989-05-11 |
Description | early bloom cruise; 17 locations; 60N 21W to 46N 18W Methods & Sampling PI: William Broenkow of: Moss Landing Marine Laboratories dataset: longtrack near-surface observations, Moss Landing dates: April 18, 1989 to June 07, 1989 location: N: 63.675 S: 38.667 W: -24.468 E: -17.642 project/cruise: North Atlantic Bloom Experiment/Atlantis II 119, leg 5 ship: Atlantis II Note: Flow through system operated with reduced flow. Many start-up problems were encountered. Fluorometer scales change frequently, not logged properly. Heating in flow-through plumbing is evident in temperature - error up to 1.5 C. Salinity agrees with CTD profiles; precision +/- 0.05 PSU. Ref: JGOFS North Atlantic Bloom long track and vertical profiling results. W.W. Broeknow, R.E. Reaves and M.A. Yarbrough MLML Tech Pub 90-1 |
Website | |
Platform | R/V Atlantis II |
Start Date | 1989-05-15 |
End Date | 1989-06-06 |
Description | late bloom cruise; 31 locations; 61N 22W to 41N 17W Methods & Sampling PI: William Broenkow of: Moss Landing Marine Laboratories dataset: longtrack near-surface observations, Moss Landing dates: April 18, 1989 to June 07, 1989 location: N: 63.675 S: 38.667 W: -24.468 E: -17.642 project/cruise: North Atlantic Bloom Experiment/Atlantis II 119, leg 5 ship: Atlantis II Note: Flow through system operated with reduced flow. Many start-up problems were encountered. Fluorometer scales change frequently, not logged properly. Heating in flow-through plumbing is evident in temperature - error up to 1.5 C. Salinity agrees with CTD profiles; precision +/- 0.05 PSU. Ref: JGOFS North Atlantic Bloom long track and vertical profiling results. W.W. Broeknow, R.E. Reaves and M.A. Yarbrough MLML Tech Pub 90-1 |
Website | |
Platform | R/V Endeavor |
Start Date | 1989-06-28 |
End Date | 1989-07-07 |
Description | post bloom cruise; 7 locations; 63°N 25°W to 59°N 14°W Methods & Sampling PI: William Broenkow of: Moss Landing Marine Laboratories dataset: longtrack near-surface observations, Moss Landing dates: June 28, 1989 to July 7, 1989 location: N: 63.826 S: 59.29 W: -24.206 E: -14.901 project/cruise: North Atlantic Bloom Experiment/Endeavor 198 ship: Endeavor Note: Data logging by LiCor data logger with 5 minute averaging - some one minute averaging during times of vertical optical profiling. Positions added and interpolated by time from SAIL -loop records. Ref: JGOFS North Atlantic Bloom long track and vertical profiling results. W.W. Broeknow, R.E. Reaves and M.A. Yarbrough MLML Tech Pub 90-1 |
One of the first major activities of JGOFS was a multinational pilot project, North Atlantic Bloom Experiment (NABE), carried out along longitude 20° West in 1989 through 1991. The United States participated in 1989 only, with the April deployment of two sediment trap arrays at 48° and 34° North. Three process-oriented cruises where conducted, April through July 1989, from R/V Atlantis II and R/V Endeavor focusing on sites at 46° and 59° North. Coordination of the NABE process-study cruises was supported by NSF-OCE award # 8814229. Ancillary sea surface mapping and AXBT profiling data were collected from NASA's P3 aircraft for a series of one day flights, April through June 1989.
A detailed description of NABE and the initial synthesis of the complete program data collection efforts appear in: Topical Studies in Oceanography, JGOFS: The North Atlantic Bloom Experiment (1993), Deep-Sea Research II, Volume 40 No. 1/2.
The U.S. JGOFS Data management office compiled a preliminary NABE data report of U.S. activities: Slagle, R. and G. Heimerdinger, 1991. U.S. Joint Global Ocean Flux Study, North Atlantic Bloom Experiment, Process Study Data Report P-1, April-July 1989. NODC/U.S. JGOFS Data Management Office, Woods Hole Oceanographic Institution, 315 pp. (out of print).
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).
Funding Source | Award |
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National Science Foundation (NSF) |