QAS winter balance survey 2025-04-23

As part of a PROMICE mission, Jason Box and Rasmus Bahbah (Nielsen) made a snow water equivalent (SWE), a.k.a. winter balance survey at seven southern Greenland ice sheet locations spanning 241 m to 950 m above sea level. The survey date is essentially at the end of the 2024/2025 accumulation season, i.e. prior to the start of the 2025 ablation season. The seven sites are host to other measurements, e.g.: SWE is being measured sub-daily by SnowFox at QAS_L, ice ablation is measured sub-daily at AWS sites (QAS_L, QAS_M, QAS_U) and annually (summer balance) at stake sites, e.g. Q2,Q3,Q4,Q5. A 9 cm Kovacs coring device was used and a snow metrics balance and a plastic bag to contain core samples. one to five coring runs were made and from the individual runs it is possible to get more vertical resolution on the snow density A .xlsx file contains a data summary from which a .csv file was also exported. see the .pdf for scans of the field notes/raw data The zip archive includes: 2025 04 23 QAS SWE survey - stakes - 7 pages.pdf, snow-profiles-QAS-2025.csv, Figures, snow-profiles-QAS-2025.xlsx, plot_snow-profiles-QAS-2025.py the work is related to Herman et al (2018), JGR, cited below and in 2018 there was another SWE survey available already in the SumUp dataset.