Geography Reference

In-Depth Information

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

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