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. 2021 Apr;22:100215. doi: 10.1016/j.cliser.2021.100215

Table 2.

List and definition of the 39 indicators.

Category Name Definition
PR snowfall-amount-winter Sum of snow precipitation, from November of year N to following April (included)
precipitation-amount-winter: Sum of total precipitation, from November of year N to following April (included)
Tas tas-11: Mean temperature for November of year N
tas-12: Mean temperature for December of year N
tas-01: Mean temperature for January of year N
tas-02: Mean temperature for February of year N
tas-03: Mean temperature for March of year N
tas-04: Mean temperature for April of year N
tas-winter: Mean temperature for November of year N to April of year N + 1 (included)
SD sd-days-05-NS Number of days with at least 5 cm of natural snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-05-GS Number of days with at least 5 cm of groomed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-05-MS Number of days with at least 5 cm of managed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-30-NS Number of days with at least 30 cm of natural snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-30-GS Number of days with at least 30 cm of groomed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-30-MS Number of days with at least 30 cm of managed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-50-NS Number of days with at least 50 cm of natural snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-50-GS Number of days with at least 50 cm of groomed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-50-MS Number of days with at least 50 cm of managed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
sd-days-Xmas-NS Number of days with at least 30 cm of natural snow on the ground, from December 22 of year N to January 4 (included) of year N + 1
sd-days-Xmas-GS Number of days with at least 30 cm of groomed snow on the ground, from December 22 of year N to January 4 (included) of year N + 1
sd-days-Xmas-MS Number of days with at least 30 cm of managed snow on the ground, from December 22 of year N to January 4 (included) of year N + 1
sd-days-PUR-NS Number of days with at least 30 cm of natural snow on the ground, from December 4 of year N to December 10 of year N (included)
sd-days-PUR-GS Number of days with at least 30 cm of groomed snow on the ground, from December 4 of year N to December 10 of year N (included)
sd-days-PUR-MS Number of days with at least 30 cm of managed snow on the ground, from December 4 of year N to December 10 of year N (included)
SWE swe-days-100-NS Number of days with an amount of at least 100 kg m−2 of natural snow on the ground, starting on August 1st of year N to July 31st of year N + 1
swe-days-100-GS Number of days with an amount of at least 100 kg m−2 of groomed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
swe-days-100-MS Number of days with an amount of at least 100 kg m−2 of managed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
swe-days-120-NS Number of days with an amount of at least 120 kg m−2 of natural snow on the ground, starting on August 1st of year N to July 31st of year N + 1
swe-days-120-GS Number of days with an amount of at least 120 kg m−2 of groomed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
swe-days-120-MS Number of days with an amount of at least 120 kg m−2 of managed snow on the ground, starting on August 1st of year N to July 31st of year N + 1
MM-PROD mm-prod Annual amount of machine made snow produced (in kg m−2), from August 1st of year N to July 31st of year N + 1
WBT: wbt-2-hrs Early season potential snowmaking hours (for wet bulb temperature lower than −2°C), from November 1st, year N to December 31st, year N.
wbt-5-hrs Early season potential snowmaking hours (for wet bulb temperature lower than −5°C), from November 1st, year N to December 31st, year N.
BS-ES: beginning-season-30-NS Beginning of season, i.e. first date of the longest continuous period with at least 30 cm of natural snow on the ground (from August 1st of year N to July 31st of year N + 1)
end-season-30-NS End of season, i.e. last date of the longest continuous period with at least 30 cm of natural snow on the ground (from August 1st of year N to July 31st of year N + 1)
beginning-season-30-GS Beginning of season, i.e. first date of the longest continuous period with at least 30 cm of groomed snow on the ground (from August 1st of year N to July 31st of year N + 1)
end-season-30-GS End of season, i.e. last date of the longest continuous period with at least 30 cm of groomed snow on the ground (from August 1st of year N to July 31st of year N + 1)
beginning-season-30-MS Beginning of season, i.e. first date of the longest continuous period with at least 30 cm of managed snow on the ground (from August 1st of year N to July 31st of year N + 1)
end-season-30-MS End of season, i.e. last date of the longest continuous period with at least 30 cm of managed snow on the ground (from August 1st of year N to July 31st of year N + 1)