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Version devBuilt at: 2026-10-17 14:54:11 EDT

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@uaf-oarc-alaska.bsky.socialOct 16, 2026, 4:36 PM

This week we are analyzing seawater samples collected at the long-term mooring site #GAKOA in the Gulf of Alaska. #VINDTA @agdco2.bsky.social #FieldworkFriday πŸ§ͺπŸŒŠπŸ¦‘πŸ›Ÿ

A yellow and blue surface buoy in Sunny Cove, Resurrection Bay, Alaska measures seawater carbon dioxide to detect ocean acidification. The water is calm and there is still snow on the mountains.
@uaf-oarc-alaska.bsky.socialSep 16, 2026, 7:41 PM

Our Gulf of Alaska #OceanAcidification buoy site has mostly observed below average sea surface temperatures in 2026 when compared to our full record. πŸ§ͺπŸŒŠπŸ¦‘πŸ›Ÿ #GAKOA

Project Mooring site GAKOA in the northern Gulf of Alaska is led by University of Alaska Fairbanks Ocean Acidification Research Center (UAF OARC) to observe seawater carbon dioxide to detect ocean acidification. All surface observations at GAKOA show a strong seasonal signal. Figures The top panel shows observations of the difference in the partial pressure of carbon dioxide (Ξ”pCOβ‚‚) between one meter above the sea-air interface and one meter below the sea-air interface. A negative value indicates the seawater pCOβ‚‚ is lower than air, and the site is a carbon dioxide sink to the atmosphere. Seawater carbon dioxide is consumed by phytoplankton during the summer, resulting in more negative Ξ”pCOβ‚‚ values. The middle panel is surface seawater temperature (SST), observed by a seaCAT sensor moored one meter below the sea-air interface. The bottom panel is surface seawater salinity (SSS), observed by a seaCAT sensor moored one meter below the sea-air interface. The dark black line is the site average, the gray lines are the final and archived data from previous deployments (i.e., 2011-2025), and the blue dots are the 3-hour, raw data from the current deployment.