| Condition variable | Subvariable | Unit | Condition 2015 | Condition 2018 | Condition 2021 |
|---|---|---|---|---|---|
| The values of the condition variables present the yearly arithmetic average for the respective ecosystem, if not definied differently by the measurement unit. 1: According to 39. BimSchV AOT (Accumulated Ozone Exposure) 40 is the sum of differences between ozone values above 80 micrograms per cubic metre over a specific period, based on hourly concentrations between 8 an 20 CET. 2: Calculation are based on ecosystem groups Natural or extensively used grassland and Wetlands. 3: Due to a methodological change in the underlying data source (increased spatial resolution) the changes between the time steps cannot be interpreted. . = Numerical value unknown or not to be disclosed. | |||||
| Ground-level ozone | Exceedence of limit for AOT401 | micrograms per cubic metre | 12,152.0 | 16,823.2 | 8,995.0 |
| Soil moisture (top soil) | Drought | days per year | 81.3 | 188.7 | 47.9 |
| Abnormal aridity | days per year | 48.4 | 27.0 | 43.1 | |
| Glacier extent | Volume | thousand cubic metre | 7,746.0 | 3,940.0 | 1,860.0 |
| Area | hectare | 53.8 | 44.6 | 36.0 | |
| Normalized Diffference Vegetation Index | April-September | index (-1 to 1) | 0.6 | 0.6 | 0.6 |
| Vegetation period2 | Length | days | 183 | 152 | 159 |
| Tree cover density2 | % | 14.8 | 12.5 | . | |
| Coastal imperviousness3 | % (3 kilometre coastal buffer) | 5.5 | 6.2 | . | |
| Protected area | % | 67.5 | 67.9 | 68.1 | |
| Grassland use intensity | mowing events per year | . | 1.1 | 0.9 | |
| Air temperature | March, April, May | Celsius | 7.6 | 9.1 | 6.2 |
| June, July, August | Celsius | 17.1 | 18.1 | 17.0 | |
| September, October, November | Celsius | 9.0 | 9.7 | 9.4 | |
| December, January, February | Celsius | 1.3 | 0.7 | 1.1 | |
| Precipitation | March, April, May | millimetre (sum) | 234.7 | 162.1 | 229.8 |
| June, July, August | millimetre (sum) | 266.6 | 204.7 | 388.0 | |
| September, October, November | millimetre (sum) | 245.7 | 127.0 | 178.4 | |
| December, January, February | millimetre (sum) | 228.5 | 251.0 | 206.5 | |
| Snow cover | days | 39.8 | 42.4 | 56.2 | |
As at 25 April 2025