Simulations of North Indian Winter Climate Using Non-hydrostatic RegCM

The climate over North India during winter has been endorsed with a good amount of precipitation that occurs due to the interaction between the tropical–extratropical flows. We examined two land surface parameterizations namely Biosphere Atmosphere Transfer (BAT) scheme and the Community Land Model...

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Published inPure and applied geophysics Vol. 181; no. 1; pp. 327 - 348
Main Authors Karadan, M. M., Raju, P. V. S., Prasad, D. Hari
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 2024
Springer Nature B.V
Subjects
Biosphere
Boundary conditions
Climate
Climate models
Earth and Environmental Science
Earth Sciences
Enthalpy
Extreme weather
Geophysics/Geodesy
Heat flux
Heat transfer
Precipitation
Rainfall
Regional climate models
Regional climates
Sensible heat
Sensible heat flux
Sensible heat transfer
Simulation
Soil analysis
Soil moisture
Winter
Winter climates
India
Winter climate
land surface parameterization
precipitation
Regional Climate Model (RegCM)
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Summary:The climate over North India during winter has been endorsed with a good amount of precipitation that occurs due to the interaction between the tropical–extratropical flows. We examined two land surface parameterizations namely Biosphere Atmosphere Transfer (BAT) scheme and the Community Land Model (CLM) with the Regional Climate Model (RegCM) on simulation of North Indian winter climate. RegCM model is configured for the Indian region and was integrated from 1 January 1982 to 31 December 2016 using the initial–boundary condition of ERA-interim reanalysis. Our results reveal that the CLM features of rainfall, temperature, and circulation at 700 hPa provided an added value with respect to BAT. The analysis of extreme rainfall seasons revealed the relative resemblance of CLM with CRU by means of sensible heat flux and soil moisture analyses. Various verification methods such as Taylor metrics, Improvement parameter, and root mean square deviation also reveal the consistency of CLM in its better performance over BAT simulations. These findings suggest that the implementation of CLM scheme with RegCM results in the added value of winter climate simulations than BAT over north India and thus the usage of the same are encouraged over the region.
ISSN:0033-4553
1420-9136
DOI:10.1007/s00024-023-03397-6