1995 and 1996 fairly raw chlorophyll data, Georges Bank collected from the GLOBEC Broadscale cruises from the Gulf of Maine and Georges Bank (GB project)

Website: https://www.bco-dmo.org/dataset/2298
Data Type: Cruise Results
Version: 1
Version Date: 2005-11-15

Project
» U.S. GLOBEC Georges Bank (GB)

Program
» U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)
ContributorsAffiliationRole
Mountain, DavidNortheast Fisheries Science Center - Woods Hole (NOAA NEFSC)Principal Investigator, Co-Principal Investigator
Taylor, MaureenNational Marine Fisheries Service (NMFS)Co-Principal Investigator
Copley, NancyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
Raw Extracted Chlorophyll Data from Broadscale CTD stations in the Gulf of Maine, 1995 and 1996.


Coverage

Spatial Extent: N:42.335 E:-65.6483 S:40.4383 W:-68.9567
Temporal Extent: 1995-05-09 - 1996-03-18

Dataset Description

Raw Extracted Chlorophyll Data from Broadscale CTD stations, 1995 and 1996.

PI NOTES:
The 1995 and 1996 bottle data were collected with a GO rosette mounted above the MK5 CTD. Water for chlorophyll extractions was taken at priority 1 and 2 stations and at 3 "standard" depths (according to a protocal set up by Ted Durbin and Dian Gifford at the University of Rhode Island). For each bottle, 3 replicate samples were run for consistency. 50 mls were filtered for 3 size fractions: total chlorophyll, chlorophyll from water filtered through a <20 micron mesh and chlorophyll from water filtered through a <5 micron mesh. This means that for any one station, there were 27 test tubes: 3 depths, 3 replicates, 3 size fractions. The samples were usually read at sea (after the 24 hour acetone extraction). If not, Ted Durbin"s Lab read them when the ship returned.

The companion object for this data is chloro_bot_chem, which details salinity, temperature, fluorometry and tranmissometry collected from the same bottles.


Contacts for the data:
David Mountain
NMFS
Woods Hole, MA 02543
508-495-2271
David.Mountain@noaa.gov
Fax: 508-495-2258

or
Maureen Taylor
NOAA/NMFS
166 Water Street
Woods Hole, MA 02543
508-495-2306
mtaylor@whsun1.wh.whoi.edu
FAX: 508-495-2258

 

Updated November 15, 2005; gfh


Acquisition Description

The 1995 and 1996 bottle data were collected with a GO rosette mounted above the MK5 CTD. Water for chlorophyll extractions was taken at priority 1 and 2 stations and at 3 'standard' depths (according to a protocal set up by Ted Durbin and Dian Gifford at the University of Rhode Island). For each bottle, 3 replicate samples were run for consistency. 50 mls were filtered for 3 size fractions: total chlorophyll, chlorophyll from water filtered through a <20 micron mesh and chlorophyll from water filtered through a <5 micron mesh. This means that for any one station, there were 27 test tubes: 3 depths, 3 replicates, 3 size fractions. The samples were usually read at sea (after the 24 hour acetone extraction). If not, Ted Durbin's Lab read them when the ship returned.


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Parameters

ParameterDescriptionUnits
cruiseidcruise identification
yearyear
cast CTD rosette cast number
bottlebottle number on this cast
depth depth of sample meters
fraction size fraction of phytoplankton sampled microns
chl_achlorophyll a, as calculated from fluorescence micrograms/liter
chl_a_avg chlorophyll a average, based on three replicates micrograms/liter
latlatitude in decimal degrees: North is positive; negative denotes South decimal degrees
lonlongitude in decimal degrees: East is positive; negative denotes West decimal degrees
station_stdstandard broad-scale station number integer
day_locallocal-time day 1 to 31
month_locallocal-time month 1 to 12
time_locallocal time of cast
yrday_locallocal day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon)


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Instruments

Dataset-specific Instrument Name
Niskin Bottle
Generic Instrument Name
Niskin bottle
Dataset-specific Description
Niskin Bottles mounted on a Rosette.
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.


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Deployments

AL9505

Website
Platform
R/V Albatross IV
Report
Start Date
1995-05-09
End Date
1995-05-18
Description
broad-scale

AL9506

Website
Platform
R/V Albatross IV
Report
Start Date
1995-06-05
End Date
1995-06-15
Description
broad-scale

AL9508

Website
Platform
R/V Albatross IV
Report
Start Date
1995-07-10
End Date
1995-07-20
Description
broad-scale

AL9605

Website
Platform
R/V Albatross IV
Report
Start Date
1996-05-06
End Date
1996-05-17
Description
broad-scale

AL9607

Website
Platform
R/V Albatross IV
Report
Start Date
1996-06-03
End Date
1996-06-13
Description
broad-scale

EN261

Website
Platform
R/V Endeavor
Start Date
1995-02-10
End Date
1995-02-20
Description
broad-scale

EN263

Website
Platform
R/V Endeavor
Report
Start Date
1995-03-13
End Date
1995-03-24
Description
broad-scale

EN265

Website
Platform
R/V Endeavor
Start Date
1995-04-11
End Date
1995-04-22
Description
broad-scale

EN276

Website
Platform
R/V Endeavor
Report
Start Date
1996-01-10
End Date
1996-01-22
Description
broad-scale

EN278

Website
Platform
R/V Endeavor
Start Date
1996-02-13
End Date
1996-02-25
Description
broad-scale

EN282

Website
Platform
R/V Endeavor
Start Date
1996-04-08
End Date
1996-04-20
Description
broad-scale

OC275

Website
Platform
R/V Oceanus
Start Date
1996-03-11
End Date
1996-03-22
Description
broad-scale


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Project Information

U.S. GLOBEC Georges Bank (GB)


Coverage: Georges Bank, Gulf of Maine, Northwest Atlantic Ocean


The U.S. GLOBEC Georges Bank Program is a large multi- disciplinary multi-year oceanographic effort. The proximate goal is to understand the population dynamics of key species on the Bank - Cod, Haddock, and two species of zooplankton (Calanus finmarchicus and Pseudocalanus) - in terms of their coupling to the physical environment and in terms of their predators and prey. The ultimate goal is to be able to predict changes in the distribution and abundance of these species as a result of changes in their physical and biotic environment as well as to anticipate how their populations might respond to climate change.

The effort is substantial, requiring broad-scale surveys of the entire Bank, and process studies which focus both on the links between the target species and their physical environment, and the determination of fundamental aspects of these species' life history (birth rates, growth rates, death rates, etc).

Equally important are the modelling efforts that are ongoing which seek to provide realistic predictions of the flow field and which utilize the life history information to produce an integrated view of the dynamics of the populations.

The U.S. GLOBEC Georges Bank Executive Committee (EXCO) provides program leadership and effective communication with the funding agencies.



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Program Information

U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)


Coverage: Global


U.S. GLOBEC (GLOBal ocean ECosystems dynamics) is a research program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.

The U.S. GLOBEC Program currently had major research efforts underway in the Georges Bank / Northwest Atlantic Region, and the Northeast Pacific (with components in the California Current and in the Coastal Gulf of Alaska). U.S. GLOBEC was a major contributor to International GLOBEC efforts in the Southern Ocean and Western Antarctic Peninsula (WAP).



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Funding

Funding SourceAward
National Science Foundation (NSF)
National Oceanic and Atmospheric Administration (NOAA)

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