| 年平均气温 Mean annual air temperature | TM (℃) | 日平均气温的年平均值 Yearly mean value of daily mean air temperature |
日最高气温的最大值
Maximum value of daily maximum air temperature | TXx (℃) | 日最高气温的年最大值 Yearly maximum value of daily maximum air temperature |
| 暖昼日数 Warm days | TX90 (d) | 日最高气温>90%分位值的日数 Number of days when daily maximum air temperature >90th percentile |
| 夏季日数 Summer days | SU (d) | 日最高气温大于25 ℃的全部天数 Annual count of days when daily maximum air temperature >25 °C |
日最高气温的最小值
Minimum value of daily maximum air temperature | TXn (℃) | 日最高气温的年最小值 Yearly minimum value of daily maximum air temperature |
| 冷昼日数 Cool days | TX10 (d) | 日最高气温<10%分位值的日数 Number of days when daily maximum air temperature <10th percentile |
| 冰冻日数 Icing days | ID (d) | 日最高气温<0 ℃的全部天数 Annual count of days when daily maximum air temperature <0 °C |
日最低气温的最大值
Maximum value of daily minimum air temperature | TNx (℃) | 日最低气温的年最大值 Yearly maximum value of daily minimum air temperature |
| 暖夜日数 Warm nights | TN90 (d) | 日最低气温>90%分位值的日数 Number of days when daily minimum air temperature >90th percentile |
| 热带夜数 Tropical nights | TR (d) | 日最低气温大于20 ℃的全部天数 Annual count of days when daily minimum air temperature >20 °C |
日最低气温的最小值
Minimum value of daily minimum air temperature | TNn (℃) | 日最低气温的年最小值 Yearly minimum value of daily minimum temperature |
| 冷夜日数 Cool nights | TN10 (d) | 日最低气温<10%分位值的日数 Number of days when daily minimum air temperature <10th percentile |
| 霜冻日数 Frost days | FD (d) | 日最低气温小于0 ℃的全部天数 Annual count of days when daily minimum air temperature <0 °C |
| 持续冷期指数 Cold spell duration index | CSDI (d) | 至少连续6天最低气温小于基准期内10%分位值的天数 Annual count of days with at least 6 consecutive days when daily minimum air temperature <10th percentile |
| 持续暖期指数 Warm spell duration index | WSDI (d) | 至少连续6天最高气温大于基准期内90%分位值的天数 Annual count of days with at least 6 consecutive days when daily maximum air temperature >90th percentile |
| 生长季长度 Growing season length | GSL (d) | 第一次连续6天以上日平均气温大于5 ℃至第一次(6月1日后)连续6天日平均气温小于5 ℃的天数 Annual count between first span of at least 6 days with daily mean air temperature >5 °C and first span after June 1st of 6 days with daily mean air temperature <5 °C |
| 气温日较差 Diel temperature range | DTR (℃) | 日最高气温与最低气温的差的平均值 Yearly mean difference between daily maximum air temperature and daily minimum air temperature |
| 年降水量 Annual precipitation | PRE (mm) | 年总降水量 Total annual precipitation |
湿日总降水量
Annual total precipitation on wet days | PRCPTOT (mm) | 大于等于1 mm的日降水量的总和 Annual total precipitation on wet days (daily precipitation ≥1 mm) |
| 强降水量 Precipitation amount on very wet days | R95 (mm) | 大于基准期内95%分位点的日降水量的总和 Annual total precipitation on days when daily precipitation >95th percentile |
极端强降水量
Precipitation amount on extremely wet days | R99 (mm) | 大于基准期内99%分位点的日降水量的总和 Annual total precipitation on days when daily precipitation >99th percentile |
降水强度
Simple daily intensity index for precipitation | SDII
(mm·d-1) | 降水量与降水日数的比值 Annual total precipitation divided by the number of wet days (defined as daily precipitation ≥1.0 mm) in the year |
| 1日最大降水量 Maximum 1-day precipitation | Rx1day (mm) | 最大的日降水量 Yearly maximum value of daily precipitation |
5日最大降水量
Maximum 5-day consecutive precipitation | Rx5day (mm) | 最大的连续5天降水量 Yearly maximum 5-day consecutive precipitation |
| 连续湿日数 Consecutive wet days | CWD (d) | 最长连续降水日数 Yearly maximum number of consecutive days with a daily precipitation ≥1 mm |
| 连续干日数 Consecutive dry days | CDD (d) | 最长连续无降水日数 Yearly maximum number of consecutive days with daily precipitation <1 mm |
| 降水日数 Number of wet days | R1mm (d) | 日降水量≥1 mm的天数 Number of days when daily precipitation ≥1 mm |
| 中雨日数 Number of heavy precipitation days | R10mm (d) | 日降水量≥10 mm的天数 Annual count of days when daily precipitation ≥10 mm |
| 大雨日数 Number of very heavy precipitation days | R20mm (d) | 日降水量≥20 mm的天数 Annual count of days when daily precipitation ≥20 mm |