Statistical downscaling of global models historical maximum temperature record were performed for 20 years during the base period 1986-2005 using Global Coupled Models (GCM), such as the Coupled Model Inter-comparison phase 5 (CMIP5).This period is termed as a ‘reference period’ for future projection of heat wave. The extreme weather events such as heat waves have a significant impact on the Indian climate. The frequency, intensity, duration and number of spells of these heat waves are increasing in the recent years. Local to regional scale climate cannot be predicted by GCM’s. Statistical downscaling method such as Bias-Correction Spatial Disaggregation (BCSD) method is used in generating the statistical downscaling algorithm to tackle the present limitations of GCM outputs. Four models such as CanESM2, MIROC-ESM-CHEM, IPSL-CM5A-LR and NorESM1-M from CMIP5 models were chosen and biases are corrected for Indian domain.Various geographical regions of India have been examined. Observational data is taken from India Meteorological Department (IMD) gridded daily maximum temperature data at 1 degree resolution for the same period. The CMIP5 models data has been obtained and it is downscaled using statistical methods. The performance of this downscale data is tested using parameters such as Mean Absolute Error (MAE), Root Mean square Error (RMSE), Correlation cofficienbetween each simulated model and observational data for the same time period over the study area, bias of each model from IMD observational data, Mean percentage error, Index of Agreement with given observation and model time series. By using this method biases were removed to greater extent and correlation coefficient also increased. This method can be applied to future data for bias correction and to improve the correlation.

1.
T.
Reichler
and
J.
Kim
,
Bull. Am. Meteorol. Soc.
89
,
303
311
(
2008
).
2.
S.
Das
and
S. C.
Smith
,
Climate ChangeEcon.
3
,
1250010
1250011
(
2012
).
3.
D. A.
Randall
,
Cambridge University Press
, pp,
589
662
(
2007
).
4.
A. Dhorde Anargha
Dhorde
and
S.
AlakaGadgil
,
J. Indian Geophys. Union
13
,
85
97
(
2009
).
5.
D. K.
Panda
,
A. Agha
Kouchak
and
S. K.
Ambast
,
J. Geophys. Res. Atmos
122
,
9129
9134
(
2017
).
6.
P.
Rohini
,
M.
Rajeevan
and
A. K.
Srivastava
,
Sci. Rep
,
6
,
26153
(
2016
).
7.
S. K.
Dash
and
A.
Mamgain
,
J. Appl. Meteorol. Climatol.
50
,
1842
1958
(
2011
).
8.
A. J.
McMichael
,
R. E.
Woodruff
and
S.
Hales
,
Lancet
367
,
859
969
(
2006
).
9.
Venkata B.
Doodle
,
G. Ch.
Satyanarayana
and
Srinivas
Desamsetti
,
Natural Hazards
,
87
,
395
414
(
2017
)
10.
G. Ch.
Satyanarayana
and
Bhaskar Rao
D. V.
,
Atmospheric Research
, Vol.
245
,
105078
(
2020
)
11.
N.
Umakanth
,
G.Ch.
Satyanarayana
,
Ch. Lakshmi
Harika
,
Ch.
Shweta
,
N. Akhil
Chowdary
,
International Journal of Recent Technology and Engineering
,
8
,
2277
3878
(
2019
).
12.
D. S.
Pai
,
S. A.
Nair
and
A. N.
Ramanathan
,
Mausam
,
64
,
585
604
(
2013
).
13.
S.
Hallegatte
,
J. C.
Hourcade
and
P.
Dumas
,
Ecol. Econ.
62
,
330
40
(
2007
).
14.
J. P.
Dunne
,
R. J.
Stouffer
and
J. G.
John
,
Nat. Clim. Change
,
563
566
(
2013
).
15.
B. C.
Hewitson
and
R. G.
Crane
,
Int. J. Climatol
,
26
,
1315
1337
(
2006
).
16.
G.
Burger
,
T. Q.
Murdock
,
A. T.
Werner
,
S. R.
Sobie
, and
A. J.
Cannon
,
J. Climate
,
25
,
4366
4388
(
2012
).
17.
Z.
Liu
,
A.
Mehran
,
T. J.
Phillips
and
A.
AghaKouchak
,
Clim. Res.
60
,
35
50
(
2014
).
18.
G. Ch.
Satyanarayana
,
R. H. Lucy
Supriya
and
D. V.
BhaskarRao
,
Meteorol. Appl.
1
16
(
2018
)
19.
G. Ch.
Satyanarayana
,
Venkata B.
Dodla
and
D.
Srinivas
,
Meteorol. Appl.
27
,
1
13
(
2019
)
20.
N.
Umakanth
,
G. Ch. Satyanarayana B.
Simon
 et al,
ActaGeophys.
68
,
921
932
(
2020
).
21.
N.
Umakanth
,
G. Ch.
Satyanarayana
,
Baby
Simon
and
Myla Chimpiri
Rao
,
Asian Journal of Atmospheric Environment
,
14
,
119
132
(
2020
).
22.
A. K.
Srivastava
,
M.
Rajeevan
and
S. R.
Kshirsagar
,
Atmos. Sci. Lett.
10
,
249
254
(
2009
).
23.
D. S.
Wilks
,
Statistical methods in the atmospheric sciences
, 2ndedn.
Academic Press
,
London
(
2006
).
24.
N.
Naveena
,
G. Ch.
Satyanarayana
,
D. V.
BhaskarRao
,
D.
Srinivas
,
Nat. Hazards
(
2020
).
25.
Ahammad
S.H.
,
Rajesh
V.
,
Saikumar
K.
,
Jalakam
S.
,
Kumar
G.N.S
,
International Journal of Electrical and Computer Engineering
,
9
(
5
), PP.
3457
3464
(
2019
).
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