Temperature and salinity time series measurements from the GAK1 Mooring in the Northern Gulf of Alaska near Seward, AK, 2017-2021, NGA LTER.

The data set contains measurements of temperature and salinity made by CTD instruments during year-long deployments of a mooring at the GAK1 site in the Northern Gulf of Alaska. Six instruments collect data at roughly standard depths during the annual deployments. Data are presented as CSV files, with a separate file for each depth and deployment year. Files from each deployment year are grouped in a .zip file. This mooring has been recovered and redeployed annually since 1998; these particular measurements are a continuation of a mooring data set that was previously archived as part of the Environmental Drivers component of the Gulf Watch Alaska (GWA) program funded by the Exxon Valdez Oil Spill Trustee Council. Those measurements, in turn, extend a program of monthly CTD casts performed from ships at the GAK1 location from the 1970s to the current day. The sampling occurs at 59° 50.7' N, 149° 28.0' W and is located within the Alaska Coastal Current and is connected with the inner Gulf of Alaska shelf circulation. These data are part of the Northern Gulf of Alaska Long Term Ecological Research (NGA LTER) program. The LTER program is a National Science Foundation–funded network of 28 sites nationwide that focus on the influence of long-term and large-scale phenomenon on ecosystems. Additional funding for sampling is provided by the North Pacific Research Board (NPRB), the Alaska Ocean Observing System (AOOS), and the Exxon Valdez Oil Spill Trustee Council (EVOS) via the Gulf Watch Alaska program.