Longtrack near-surface observations from R/V Atlantis II, R/V Endeavor cruises AII-119-4, AII-119-5, EN198 in the North Atlantic (U.S. JGOFS NABE project)

Website: https://www.bco-dmo.org/dataset/2568
Version: final
Version Date: 1996-04-19

Project
» U.S. JGOFS North Atlantic Bloom Experiment (NABE)

Program
» U.S. Joint Global Ocean Flux Study (U.S. JGOFS)
ContributorsAffiliationRole
Broenkow, WilliamMoss Landing Marine Laboratories (MLML)Principal Investigator
Chandler, Cynthia L.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Longtrack near-surface observations


Acquisition Description

 
  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


[ table of contents | back to top ]

Parameters

ParameterDescriptionUnits
yearyear as YYYY dimensionless
cruisecruise designation dimensionless
legleg of cruise (4 or 5) dimensionless
latLatitude decimal degrees
lonLongitude decimal degrees
dateDate yyyymmdd
timeTime of day GMT decimal hours
yrdayDay of Year, 1989, assigned by U.S.JGOFS DMO, Jan 1 noon = 1.5 decimal day of year
salSalinity PSU
tempTemperature degrees C
fluorRescaled Fluorescence 685 nm approx. mg/m^3 chlorophyll
par_EiIncident PAR 400-700 nm Irradiance umole/sec/m^2
par_EoIncubator PAR Scalar Irradiance umole/sec/m^2


[ table of contents | back to top ]

Instruments

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).

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.


[ table of contents | back to top ]

Deployments

AII-119-4

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

Acquisition Description
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

AII-119-5

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

Acquisition Description
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

EN198

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

Acquisition Description
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


[ table of contents | back to top ]

Project Information

U.S. JGOFS North Atlantic Bloom Experiment (NABE)


Coverage: North Atlantic


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).



[ table of contents | back to top ]

Program Information

U.S. Joint Global Ocean Flux Study (U.S. JGOFS)


Coverage: Global


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).



[ table of contents | back to top ]

Funding

Funding SourceAward
National Science Foundation (NSF)

[ table of contents | back to top ]