Table 2.
List of heat stress indices, their types, codes, and description
| Type | Name | Code | Description |
|---|---|---|---|
| Absolute values | Coldest night | TNn | Minimum of daily minimum temperature |
| Coldest day | TXn | Minimum of daily maximum temperature | |
| Hottest night | TNx | Maximum of daily minimum temperature | |
| Hottest day | TXx | Maximum of daily maximum temperature | |
| Percentiles | UHI intensity based on 5% warmest nights | TN95 | The pixels experience a warm night, when TN for that pixel is greater than 95th percentile of TN (TNp95) |
| Threshold | Combined hot days and warm nights | CHW | Number of days when days are hotter than 35 °C and nights are hotter than 20 °C |
| Duration | Number of heat wave days | NHWD | Average number of days of heat wave each year |
| Frequency of heat wave events | FHW | Frequency of occurrence of heat wave each year | |
| Average duration of heat wave events | DHW | Average number of days a heat wave persists | |
| Average intensity of heat wave events | IHW | Maximum of average temperature of heat wave days |