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Project Information

Title: Long-term Monitoring of Oceanographic Conditions in the Alaska Coastal Current from Hydrographic Station GAK-1

Project Year and Number: 2018: 18120114-I

Other Fiscal Years and Numbers for this Project: 2017: 17120114-I, 2016: 12120114-P, 2015: 12120114-P, 2014: 14120114-P, 2014: 12120114-P, 2013: 13120114-P, 2013: 12120114-P, 2012: 12120114-P

Principal Investigator (PI): Seth Danielson, UAF

Assisting Personnel: None

Research Location:

Restoration Category:

Injured Resources Addressed: Common Murres , Kittlitz's Murrelets , Marbled Murrelets , Pacific Herring , Passive Use

Abstract: This project continues a 45-year time-series of temperature and salinity measurements at hydrographic station GAK-1. The data set, which began in 1970, now consists of quasi-monthly conductivity-temperature versus depth casts and a mooring outfitted with seven temperature/conductivity recorders distributed throughout the water column and a fluorometer at 20 m depth. The project monitors five important Alaska Coastal Current (ACC) ecosystem parameters that quantify and help us understand hourly to seasonal, interannual, and multi-decadal period variability in: 1) temperature and salinity throughout the 250 m-deep water column, 2) near surface stratification, 3) surface pressure fluctuations, 4) fluorescence as an index of phytoplankton biomass, and 5) along-shelf transport in the ACC. All of these parameters are basic descriptors that characterize the workings of the inner shelf and the ACC, an important habitat and migratory corridor for organisms inhabiting the northern Gulf of Alaska, including Prince William Sound and resources injured by the Exxon Valdez oil spill. We are aware of 69 publications utilizing data collected at station GAK-1, and since 2000 the citation list has grown by nearly three publications per year. Topics covered by these publications range from physical oceanography and climate through trophic (including commercial fisheries) level components and ecosystem analyses. Recent water temperatures have returned to average in the upper 100 m, but warmer than average water remains below 100 m. A newly awarded National Science Foundation Long-term Ecological Research program (awarded to GWA PIs R. Hopcroft and S. Danielson) will leverage and compliment this and other environmental drivers sampling within GWA. We are not proposing any major changes to this project in FY18.


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Proposal: View PDF (241 KB)

Funding Recommendations: View

Funding Detail For: 2018

Quarterly Project Tasks For: 2018

Annual Report: 2018: View (1,536 KB)

Final Report: Final Report Not Available - For Current Status Please Contact Us

Publications from this Project: None Available

More information may be available for this project under other years:

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Project Number Proposal Annual Reports Final Report Data
2017: 17120114-I View (PDF) 2017: View (PDF)
Final Report Not Available - For Current Status Please Contact Us No datasets
2016: 12120114-P View (PDF) 2016: Due 09/01/2016
2015: View (PDF)
Final Report Not Available - For Current Status Please Contact Us No datasets
2014: 14120114-P Not Available 2014: View (PDF)
Final Report Not Available - For Current Status Please Contact Us No datasets
2014: 12120114-P View (PDF) 2014: View (PDF)
Final Report Not Available - For Current Status Please Contact Us No datasets
2013: 13120114-P Not Available 2013: Due 09/01/2013
Final Report Not Available - For Current Status Please Contact Us No datasets
2013: 12120114-P View (PDF) 2013: View (PDF)
2012: View (PDF)
Final Report Not Available - For Current Status Please Contact Us No datasets