Table of Contents

• Coverage
• Dataset Description
  • Methods & Sampling
• Data Files
• Parameters
• Instruments
• Deployments
• Project Information
• Program Information
• Funding

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

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 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.

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).