Chemical profiles of Crescent Stream, McMurdo Dry Valleys, Antarctica (2021-2023).

This data package contains chemical profiles (anions, cations, nutrients, and dissolved organic carbon (DOC)) from water samples collected during the austral summers of 2021-2022 and 2022-2023 in Crescent Stream, located in the McMurdo Dry Valleys of Antarctica. Samples were collected from the F8 gage and from the east and west branches of Crescent Stream, just above their confluence. Grab samples were analyzed according to the McMurdo Dry Valleys LTER core stream chemistry protocols. In December 2021, permafrost degradation was observed along the banks of the west branch, with a prior degradation event documented at the same location in January 2012. This data package supports a pending publication by Wright et al., examining the impacts of permafrost degradation on stream chemistry.