| ID | Explanation |
|---|---|
| O1 | No physiological adaptation is assumed for the future scenario. |
| O2 | Percentiles are evaluated separately for the historical dataset and the scenarios. For the scenarios, the same 75-percentile is used for the present and the future scenario. The percentile is evaluated at the airport closest to the city and then used as a threshold in the evaluation for all grid cells. |
| O3 | The scenario period is too short to be used for robust extreme value analysis. |
| O4 | This is a threshold-based indicator that is dependent on choice of specific threshold. The threshold can vary from country to country and between climate regions. The thresholds selected here may not be for the individual geographic sub-region. |
| O5 | For future scenarios, the change caused by trends in emissions can be expected to dominate over the change caused by the change in climate. |
| O6 | Average outdoor, street-level The 75th percentile is a low threshold for hot days specification but is used to be consistent with health impact calculations presented for heat stress. |