| Condition variable | Subvariable | Unit | Condition 2015 | Condition 2018 | Change 2018 to 2015 |
|---|---|---|---|---|---|
| The values of the condition variables present the yearly arithmetic average for the respective ecosystems, if not definied differently by the measurement unit. 1: Due to a methodological change in the underlying data source (increased spatial resolution) the changes between the time steps cannot be interpreted and are not presented here. . = Numerical value unknown or not to be disclosed. | |||||
| Particulate matter | PM2.5 | micrograms per cubic metre | 13.75 | 10.83 | -2.92 |
| Ground-level ozone | April to September | micrograms per cubic metre | 62.09 | 68.16 | 6.07 |
| Nitrogen dioxide | micrograms per cubic metre | 13.92 | 12.26 | -1.66 | |
| Heat days | days per year | 17.92 | 21.44 | 3.52 | |
| Light emissions | nano watt per cubic centimetre Steradiant | 5.66 | 6.14 | 0.48 | |
| Imperviousness1 | % | 36.25 | 42.45 | . | |
| Normalized Difference Vegetation Index | April to September | index (-1 to 1) | 0.65 | 0.64 | -0.01 |
| Characteristic bird species | index (0 to 100) | 72.2 | . | . | |
| Urban green areas | % of total area | 17.01 | 17.88 | 0.87 | |
| Air temperature | March, April, May | Celsius | 9.03 | 10.68 | 1.65 |
| June, July, August | Celsius | 18.66 | 19.66 | 1.00 | |
| September, October, November | Celsius | 9.97 | 10.68 | 0.71 | |
| December, January, February | Celsius | 2.28 | 1.95 | -0.33 | |
| Precipitation | March, April, May | millimetre (sum) | 138.23 | 136.89 | -1.34 |
| June, July, August | millimetre (sum) | 203.81 | 123.32 | -80.49 | |
| September, October, November | millimetre (sum) | 200.19 | 89.18 | -111.01 | |
| December, January, February | millimetre (sum) | 178.10 | 189.27 | 11.17 | |
As at 21 June 2023