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Table 2

Extreme temperature and precipitation indicators

IndicatorDefinitionUnit
Extreme temperatures 
 WSDI (Warm Spell Duration Index) Annual number of days with at least six consecutive days when Tmax>90th percentile days/year 
 CSDI (Cold Spell Duration Index) Annual number of days with at least six consecutive days when Tmin<10th percentile days/year 
 TR (tropical nights) Annual number of days when daily minimum temperature >20 °C days/year 
 SU35 (hot days) Annual number of days when daily maximum temperature >35 °C days/year 
 DTR Difference between daily Tmax and daily Tmin ° 
 Tx90p Percentage of days when Tmax>90th percentile 
Extreme precipitation 
 CDD (maximum length of a dry spell) Maximum number of consecutive days when daily precipitation <1 mm days/year 
 CWD (maximum length of a wet spell) Maximum number of consecutive days when daily precipitation ≥1 mm days/year 
 R10 (10 mm precipitation days) Annual number of days when daily precipitation ≥10 mm days/year 
 R20 (20 mm precipitation days) Annual number of days when daily precipitation ≥20 mm days/year 
 RX3days Maximum consecutive 3-day total precipitation mm 
 PRCPTOT Annual sum of daily precipitation ≥1 mm mm 
IndicatorDefinitionUnit
Extreme temperatures 
 WSDI (Warm Spell Duration Index) Annual number of days with at least six consecutive days when Tmax>90th percentile days/year 
 CSDI (Cold Spell Duration Index) Annual number of days with at least six consecutive days when Tmin<10th percentile days/year 
 TR (tropical nights) Annual number of days when daily minimum temperature >20 °C days/year 
 SU35 (hot days) Annual number of days when daily maximum temperature >35 °C days/year 
 DTR Difference between daily Tmax and daily Tmin ° 
 Tx90p Percentage of days when Tmax>90th percentile 
Extreme precipitation 
 CDD (maximum length of a dry spell) Maximum number of consecutive days when daily precipitation <1 mm days/year 
 CWD (maximum length of a wet spell) Maximum number of consecutive days when daily precipitation ≥1 mm days/year 
 R10 (10 mm precipitation days) Annual number of days when daily precipitation ≥10 mm days/year 
 R20 (20 mm precipitation days) Annual number of days when daily precipitation ≥20 mm days/year 
 RX3days Maximum consecutive 3-day total precipitation mm 
 PRCPTOT Annual sum of daily precipitation ≥1 mm mm 
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