Data & Methods - European Trend Atlas of Extreme Temperature and Precipitation Records - page 10

Table 2.2 Extremes indices calculated
# Va r i a b l e Identifier Parameter Unit

1 MEANTN Mean Tmin ﾰC

2 MEANTX Mean Tmax ﾰC

3 TN2P Tmin 2nd percentile ﾰC

4 TN98P Tmin 98th percentile ﾰC

a # of days below the reference 2nd Tmin percentile

5 TN2N [days]

6 TN98N

a # of days exceeding the reference 98th Tmin percentile

[days]

b Cold spell duration index

7 CSDI10 [days]

8 TX2P Tmax 2nd percentile ﾰC

9 TX98P Tmax 98th percentile ﾰC

a # of days below the reference 2nd Tmax percentile

10 TX2N [days]

a # of days exceeding reference 98th Tmax percentile

11 TX98N [days]

c Warm spell duration index

12 WSDI90 [days]

13 HWDI

d Heat wave duration index

[days]

14 MEANTG Mean Tmean ﾰC

15 TG2P Tmean 2nd percentile ﾰC

16 TG98P Tmean 98th percentile ﾰC

17 TG2N

a # of days below reference 2nd Tmean percentile

[days]

a # of days exceeding reference 98th Tmean percentile

18 TG98N [days]

19 PRECTOT Precipitation total [mm]

20 PREC98P Precipitation 98th percentile [mm]

a # of days exceeding reference 98th precipitation percentile

21 R98N [days]

22 R98T Fraction of precipitation above the reference 98th precipitation percentile [%]

23 SDII98P Daily rainfall intensity of rainfall events above 98th reference precipitation percentile [mm]

24 SDII Simple daily rainfall intensity index [mm]

25 R5d Greatest 5-day total rainfall [mm]

26 R1d Greatest daily total rainfall [mm]

27 CDD max # of consecutive dry days (< 1 mm) [days]

a Reference percentile based on 1961-1990
b CSDI10: Cold Spell Duration Index. Counted are the total number of at least 6 consecutive days with Tmin below long-term 10th percentile
(1961-1990)
c WSDI90: Warm Spell Duration Index. Counted are the total number of at least 6 consecutive days with Tmax exceeding long-term 90th per-
centile (1961-1990)
d HWDI: Heat Wave Duration Index ( Tx ij > Tx inorm + 5). Let Txij be the daily maximum temperature at day i of period j . Let Tx inorm be the calendar
day mean calculated for a 5 day window centered on each calendar day during the base period (1961-1990).Then counted are the total number of
spells of at least 6 consecutive days exceeding Tx inorm +5 ﾰC