Table of Contents

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

U.S. GLOBEC Northeast Pacific, California Current System
Mesoscale Process Studies Chlorophyll a Data

During juvenile salmonid trawling cruises, additional sampling included CTD profiles, neuston net tows, and chlorophyll a water samples. At most stations, data on all parameters were collected.

Contacts for this data set are:
Dr. Richard Brodeur
Northwest Fisheries Science Center
National Oceanographic and Atmospheric Administration
Newport, OR 97365
Phone: 541-867-0336
Email: rick.brodeur@noaa.gov

Suzan Pool
Cooperative Institute of Marine Resources
Oregon State University
Newport, OR 97365
Phone: 541-867-0195
Email: suzan.pool@noaa.gov

Replicate samples for in-vitro chlorophyll a were collected from 3-m depth with a 1-l Niskin water sampler. Sampling done at all stations at which salmon trawling was done; additional sampling at most stations was a CTD, plankton sampling.

Samples were immediately filtered through GF/F glass fiber filters, then frozen for further analysis in the laboratory. One of two replicates was processed whereas the other was a back up sample. Chlorophyll a was processed using the cold-acetone extraction method and measured with a Turner Designs 10-AU fluorometer (Arar and Collins, 1997).

Program in a Nutshell

Goal: To understand the effects of climate variability and climate change on the distribution, abundance and production of marine animals (including commercially important living marine resources) in the eastern North Pacific. To embody this understanding in diagnostic and prognostic ecosystem models, capable of capturing the ecosystem response to major climatic fluctuations.

Approach: To study the effects of past and present climate variability on the population ecology and population dynamics of marine biota and living marine resources, and to use this information as a proxy for how the ecosystems of the eastern North Pacific may respond to future global climate change. The strong temporal variability in the physical and biological signals of the NEP will be used to examine the biophysical mechanisms through which zooplankton and salmon populations respond to physical forcing and biological interactions in the coastal regions of the two gyres. Annual and interannual variability will be studied directly through long-term observations and detailed process studies; variability at longer time scales will be examined through retrospective analysis of directly measured and proxy data. Coupled biophysical models of the ecosystems of these regions will be developed and tested using the process studies and data collected from the long-term observation programs, then further tested and improved by hindcasting selected retrospective data series.

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).