| 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: Values are based on data sources that are recorded over long time periods. Changes over time presented here therefore reflect change due to ecosystem extent conversions rather than changes in the data source of the condition variable. . = Numerical value unknown or not to be disclosed. | |||||
| Ground-level ozone | April to September | micrograms per cubic metre | 65.7 | 72.4 | 62.0 |
| Exceedence of limit for AOT401 | micrograms per cubic metre | 24,983.3 | 28,771.0 | 13,124.6 | |
| Particulate matter | PM2.5 | micrograms per cubic metre | 11.6 | 10.3 | 7.9 |
| Soil organic carbon2 | tonnes per hectare | 132.8 | 132.8 | 132.8 | |
| pH-value soil2 | pH-value | 5.12 | 5.12 | 5.12 | |
| Soil moisture (total soil) | Drought | days per year | 114.9 | 183.9 | 121.7 |
| Abnormal aridity | days per year | 59.2 | 25.9 | 69.7 | |
| Normalized Difference Vegetation Index | April-September | index (-1 to 1) | 0.77 | 0.80 | 0.79 |
| Vegetation period | Length | days | 180 | 178 | 173 |
| Characteristic bird species | index (0 to 100) | 83 | 78 | . | |
| Diversity of main tree species | index (0 to 1) | . | 0.41 | 0.41 | |
| Deadwood | cubic metre per hectare | 20.6 | . | . | |
| Tree cover density | % | 78.57 | 78.58 | . | |
| Forest fragmentation | % | 54.0 | 58.0 | 57.0 | |
| Protected area | % | 23.1 | 23.1 | 23.2 | |
| Fire damaged area | hectare | 525 | 2,348 | 147 | |
| Air temperature | March, April, May | Celsius | 8.4 | 10.0 | 6.9 |
| June, July, August | Celsius | 18.3 | 19.1 | 17.6 | |
| September, October, November | Celsius | 9.3 | 10.1 | 9.5 | |
| December, January, February | Celsius | 1.5 | 1.2 | 1.5 | |
| Precipitation | March, April, May | millimetre (sum) | 158.8 | 152.7 | 186.0 |
| June, July, August | millimetre (sum) | 204.6 | 138.3 | 325.1 | |
| September, October, November | millimetre (sum) | 211.8 | 98.5 | 132.1 | |
| December, January, February | millimetre (sum) | 194.0 | 222.1 | 205.4 | |
| Snow cover | days per year | 29.2 | 27.2 | 42.7 | |
As at 25 April 2025