Firn temperature time series to 100 m depth at two sites along the west Expéditions Glaciologiques Internationales au Groenland (EGIG) line, Greenland 2019-2021

This archive contains firn temperature data collected at two sites in the western Greenland Ice Sheet percolation zone. The sites, T3 and Crawford Point (CP), are located along the Expéditions Glaciologiques Internationales au Groenland (EGIG) line. The data are time series of firn temperature measured in boreholes drilled to 100 m depth. The boreholes were drilled by hot water methods. The CP measurements span the period June to August, 2019. This borehole was drilled in 2018, so the temperature profile had fully recovered from the drilling thermal disturbance by the start of the time series. The T3 data span the period June 2019 to September 2021. This borehole was drilled in June 2019, so the time series of measurements includes the thermal recovery from drilling (several months) and two subsequent years. The dataset was collected as part of projects funded by the U.S. National Science Foundation. These measurements are associated with additional datasets collected as part of a NSF Arctic Observing Network project, and include measurements at multiple sites on the EGIG line of firn temperature and firn density/ice content.