Table 1. Overview of the nine calculated cumulative temperature variables (temperature sums) based on daily average temperatures.

Air or soil temperature	Beginning of record	Threshold	Used value
Air	Melt-out date	0°C	Temperature in °C
Air	Melt-out date	0°C	Number of days
Air	Melt-out date	5°C	Number of days
Soil	Melt-out date	0°C	Temperature in °C
Soil	Melt-out date	0°C	Number of days
Soil	Melt-out date	5°C	Number of days
Soil	1. May	0°C	Temperature in °C
Soil	1. May	0°C	Number of days
Soil	1. May	5°C	Number of days

Melt-out dates were recorded for each subplot.