Table of Contents

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

Data are from Niskin bottle sampling on cruises in 1997 to 2004. For corresponding CTD data see files on the US GLOBEC data system. Data are final; see the 1997-2004 Nutrient/Chlorophyll Data Report (below) for details. Data are organised by year, cruise, transect, and station. Station numbers are included for reference to other cruise data.

Metadata revised: June 12, 2012

The LTOP Nutrient & chlorophyll data were collected by Pat Wheeler (pwheeler@coas.oregonstate.edu). Data are from Niskin bottle sampling on cruises in 1997 to 2004. Complete information on sample collection and analyses is available in the Data Report (PDF)

Complete analyses information is available in the Data Report (PDF).

The nuts_chl_lev0 datafile: nuts_chl.dat file was created with clean_revise_wheeler_nut_chl2.pl v0.5.

BCO-DMO corrected the 2004 Wecoma cruise ID from 'W0409' to 'W0408D'; the data report was updated in June 2012 to reflect this change.

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).