caa a22 4500 605473242 CHVBK 20210128100342.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00382-014-2420-1 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2420-1 Impact of domain size on the simulation of Indian summer monsoon in RegCM4 using mixed convection scheme and driven by HadGEM2 [Elektronische Daten] Impact of domain size on ISM simulations [S. Dash, K. Pattnayak, S. Panda, Deepika Vaddi, Ashu Mamgain] In this study, a smaller domain over India alone and a larger South Asia (SA) domain have been used in the Regional Climate Model version 4.2 (RegCM4.2) to examine the effect of the domain size on the Indian summer monsoon simulations. These simulations were carried out over a period of 36years at 50km horizontal resolution with the lateral boundary forcings of the UK Met Office Hadley Centre Global Circulation Model Version 2.0. Results show that the Indian summer monsoon rainfall is significantly reduced when the domain size for the model integration is reduced from SA to the Indian domain. In case of SA domain simulation, the Equitable Threat Scores have higher values in case of very light, light and moderate rainfall events than those in case of the Indian domain simulation. It is also found that the domain size of model integration has dominant impact on the simulated convective precipitation. The cross-equatorial flow and the Somali Jet are better represented in the SA simulation than those in the Indian domain simulation. The vertically integrated moisture flux over the Arabian Sea in the SA domain simulation is close to that in the NCEP/NCAR reanalysis while it is underestimated in the Indian domain simulation. It is important to note that when RegCM4.2 is integrated over the smaller Indian domain, the effects of the Himalayas and the moisture advection from the Indian seas are not properly represented in the model simulation and hence the monsoon circulation and associated rainfall are underestimated over India. Springer-Verlag Berlin Heidelberg, 2014 RegCM4.2 nationallicence HadGEM2 nationallicence NCEP/NCAR reanalysis nationallicence South Asia domain simulation nationallicence Indian domain simulation nationallicence Equitable Threat Score nationallicence Vertically integrated moisture flux nationallicence Dash S. Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut Pattnayak K. Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut Panda S. Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut Vaddi Deepika Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut Mamgain Ashu Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut Climate Dynamics Springer Berlin Heidelberg 44/3-4(2015-02-01), 961-975 0930-7575 44:3-4<961 2015 44 382 https://doi.org/10.1007/s00382-014-2420-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2420-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dash S. Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut NATIONALLICENCE 700 1- Pattnayak K. Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut NATIONALLICENCE 700 1- Panda S. Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut NATIONALLICENCE 700 1- Vaddi Deepika Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut NATIONALLICENCE 700 1- Mamgain Ashu Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, 110 016, Hauz Khas, New Delhi, India aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/3-4(2015-02-01), 961-975 0930-7575 44:3-4<961 2015 44 382