Analysis of Observed Trends in Daily Temperature and Precipitation Extremes in Different Agroecologies of Gurage Zone, Southern Ethiopia

Table 2

Selected ETCCDI precipitation and temperature extreme indices for the study stations.

Index	Index name	Definition of the Index	Units
	Temperature intensity
TXx	Max Tmax	Monthly maximum value of daily maximum temp	°C
TNx	Max Tmin	Monthly maximum value of daily minimum temp	°C
TXn	Min Tmax	Monthly minimum value of daily maximum temp	°C
TNn	Min Tmin	Monthly minimum value of daily minimum temp	°C
DTR	Diurnal temperature range	Monthly mean difference between TX and TN	°C
	Duration
WSDI	Warm spell duration indicator	Annual count of days with at least 6 consecutive days when TX > 90th percentile	Days
CSDI	Cold spell duration indicator	Annual count of days with at least 6 consecutive days when TN < 10th percentile	Days
	Frequency
TN10p	Cool nights	Percentage of days when TN < 10th percentile	Days
TX10p	Cool days	Percentage of days when TX < 10th percentile	Days
TN90p	Warm nights	Percentage of days when TN > 90th percentile	Days
TX90p	Warm days	Percentage of days when TX > 90th percentile	Days
	Precipitation Intensity
RX1day	Max 1-day precipitation amount	Monthly maximum 1-day precipitation	Mm
Rx5day	Max 5-day precipitation amount	Monthly maximum consecutive 5-day precipitation	Mm
SDII	Simple daily intensity index	Annual total precipitation divided by the number of wet days (defined as PRCP ≥ 1.0 mm) in the year	Mm/day
R95p	Very wet days	Annual total PRCP when RR > 95^th percentile	Mm
R99p	Extremely wet days	Annual total PRCP when RR > 99^th percentile	mm
PRCPTOT	Annual total wet day precipitation	Annual total PRCP in wet days (RR ≥ 1 mm)	mm
	Duration
CWD	Consecutive wet days	Maximum number of consecutive days with RR ≥ 1 mm	Days
CDD	Consecutive dry days	Maximum number of consecutive days with RR < 1 mm	Days
	Frequency
R10 mm	Number of heavy precipitation days	Annual count of days when PRCP ≥ 10 mm	Days
R20 mm	Number of very heavy precipitation days	Annual count of days when PRCP ≥ 20 mm	Days