Quality-controlled snow-air-ground temperature data in Valdez, Alaska (seasonally frozen ground) from 2009 to 2023

This dataset contains time-series data of snow, air and ground temperatures observed at seasonally frozen ground sites in Valdez, Alaska from 2009 to 2023. The temperatures were measured by HOBO loggers (U12, UX120-006M) and sensors (TMCx-HD), Onset Computer Corporation. The sensors were set vertically at multiple depths and heights on a PVC pole installed at the observation sites. For the period between 2009 and 2012, the equipment was installed only to cover the snow seasons, however, after 2014 it was permanently installed and observed to cover the summer seasons. The quality of this dataset has been processed for quality control on failures, i.e., missing, erroneous (physically implausible), and suspicious data (of mechanical or operational reasons), and on special attributions (e.g., under snow cover). Failure data within the installation periods were marked by -999., and attributions are flagged and annotated in the remarks. The dataset was published through the Arctic Data archive System and made available for non-commercial use.