Research Article
Trend and Abrupt Regime Shift of Temperature Extreme in Northeast China, 1957–2015
Table 1
Description of the temperature indices used in this paper; all the indices are computed using RClimDEX.
| Index | Index description | Definitions | Units |
| Extremely cold temperature indices | TN10p | Cold night frequency | Percentage of time when daily minimum temperature <10th percentile | % | TNn | Min Tmin (coldest night) | The minimum value of the daily minimum temperature | °C | TXn | Min Tmax (coldest day) | The minimum value of the daily maximum temperature | °C | DTR | Diurnal temperature range | Mean difference between daily maximum temperature and daily minimum temperature | °C | FD | Frost days | Count of days where daily minimum temperature <0°C | Days | ID | Icing days | Count of days where daily maximum temperature <0°C | Days |
| Extremely warm temperature indices | TN90p | Warm night frequency | Percentage of time when daily minimum temperature >90th percentile | % | TNx | Max Tmin (warmest night) | Maximum value of daily minimum temperature | °C | TXx | Max Tmax (warmest day) | Maximum value of daily maximum temperature | °C | Tr | Tropical nights | Count of days where daily minimum temperature >20°C | Days | GSL | Growing season length | Period between when daily mean temperature, >5°C for >5 days and daily mean temperature, < 5°C for >5 days | Days |
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