Table of Contents

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

Bottle Data (nutrients, salinities, pigments) from rosette casts from CGOA process cruises.

Rosette Bottle Data from Alpha Helix Cruises

Summary prepared by Erin Macri [WWU]; Prepared for serving: H. Batchelder, 2 Sept 2004
Re-served for text or mapserver access Jan 2007, GLOBEC DMO

Data Contact:
Suzanne L. Strom
Western Washington University
Shannon Point Marine Center
1900 Shannon Point Road
Anacortes, WA 98221-4042
stroms@cc.wwu.edu
Phone: 360-293-2188
FAX: 360-293-1083

Water column chlorophyll samples were size-fractionated using a 'fractionation cascade' . Water passed through a sequential arrangement of three filters: 20 um pore-size polycarbonate (47 mm), 5 um pore-size polycarbonate (47 mm) and 0.7 um effective pore-size glass fiber (25 mm). Preliminary tests showed that 47-mm glass fiber filters had a reduced chlorophyll extraction efficiency compared with filters 25 mm in diameter. Filters were immediately placed in 90% acetone, extracted 24 hr (-20degC, darkness), and analyzed for chlorophyll and phaeopigments a on a Turner TD700 (April, May) or Turner 112 (July) fluorometer. Total chlorophyll concentrations were estimated from the sum of the three size fractions.

1. Physical data processed by Tom Weingartner (UAF)
2. Chlorophylls provided by Suzanne Strom (WWU)
3. Nutrient analysis provided by Calvin Mordy (NOAA/PMEL)
4. Dates and times are in Local; Local is +8 hours from GMT e.g., 1100 GMT ==> 0300 Local

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).