Journal of Climatology / 2013 / Article / Tab 1

Research Article

Recent Extreme Precipitation and Temperature Changes in Djibouti City (1966–2011)

Table 1

Rainfall and temperature indices with their definitions and units.

IDIndicator nameDefinitionUnit

PTOTPrecipitation totalAnnual total precipitationmm
RdRainfall daysAnnual total of wet days (rainfall ≥1 mm)days
SDIISimple day intensity indexAverage rainfall from wet daysmm/day
Rx1dMaximum 1-day rainfallAnnual maximum 1-day rainfallmm
R10 mmNumber of heavy precipitation daysAnnual count of days when rainfall ≥10 mmdays
R20 mmNumber of very heavy precipitation daysAnnual count of days when rainfall ≥20 mmdays
R95pVery wet day frequencyAnnual count of days when rainfall ≥95th percentile of 1981–2010days
R99pExtreme rainfall frequencyAnnual count of days when rainfall ≥99th percentile of 1981–2010days
R95pSUMVery wet day intensityAnnual precipitation from days when rainfall ≥95th percentile of 1981–2010mm
R99pSUMExtreme rainfall intensityAnnual precipitation from days when rainfall ≥99th percentile of 1981–2010mm
R95pTOTVery wet day proportionPercentage of annual precipitation from days when rainfall ≥95th percentile of 1981–2010%
R99pTOTExtreme rainfall proportionPercentage of annual precipitation from days when rainfall ≥99th percentile of 1981–2010%

ATNAverage annual Annual average value of daily minimum temperature °C
ATXAverage annual Annual average value of daily maximum temperature °C
ATMAverage annual Annual average value of daily mean temperature °C
TN1pExtreme cool nightAnnual count of days when ≤1th percentile of 1971–2000 (18.6°C)days
TN5pCool nightAnnual count of days when ≤5th percentile of 1971–2000 (20.2°C)days
TN95pWarm nightAnnual count of days when ≥95th percentile of 1971–2000 (32.2°C)days
TN99pExtreme warm nightAnnual count of days when ≥99th percentile of 1971–2000 (33.6°C)days
TX1pExtreme cool dayAnnual count of days when ≤1th percentile of 1971–2000 (27.5°C)days
TX5pCool dayAnnual count of days when ≤5th percentile of 1971–2000 (28.5°C)days
TX95pWarm dayAnnual count of days when ≥95th percentile of 1971–2000 (43.9°C)days
TX99pExtreme warm dayAnnual count of days when ≥99th percentile of 1971–2000 (45.0°C)days