Snow-off and snow-on days for Arctic/boreal region from ERA5, 1959-2024

The variables are extracted from the hourly ERA5 data, variable SD ("snow depth" as water equivalent in m) as follows: lastsnowJDay: The Julian Day of the last date during the Jan-Jun period of a given year with > 0 snow. lastsnowstreakJDay: The Julian Day of the last date during the Jan-Jun period of a given year that concludes an at least 7-day streak of consecutive days with > 0 snow. cumulsnowJanJun: Number of days during Jan-Jun period of a given year with > 0 snow. firstsnowJDay: The Julian Day of the first date during the Jul-Dec period of a given year with > 0 snow. firstsnowstreakJDay: The Julian Day of the first date during the Jul-Dec period of a given year that starts an at least 7 day streak of > 0 snow. cumulsnowJulDec: Number of days during Jul-Dec period of a given year with > 0 snow. Time range: 1959-2024