caa a22 4500 605473404 CHVBK 20210128100342.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s00382-014-2188-3 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2188-3 Simulations of the Asian monsoon using a regionally coupled-global model [Elektronische Daten] [Ravi Shukla, James Kinter III] This study examines the simulation of June-September mean of the Asian monsoon in three different numerical experiments with a global climate model in which the atmosphere and ocean are coupled (coupled general circulation model, CGCM), regionally coupled ("Pacemaker”), and with specified sea surface temperature as in the Atmospheric Model Inter-comparison Project (AMIP) applied to a global atmospheric general circulation model (AGCM). The main features of the climatology for wind at 850hPa, rainfall and zonal wind shear (U200-U850hPa) over the South China Sea, subtropical western Pacific and Arabian Sea regions are remarkably well simulated in the Pacemaker experiment, compared with observations, whereas the CGCM and AGCM experiments either underestimate or overestimate magnitude of anomalies. The observed relationships between NINO3.4 (an index of El Niño and the Southern Oscillation, ENSO) and the Indian summer monsoon indices are remarkably better captured in the Pacemaker experiment than in the CGCM or AGCM/AMIP experiments. The pattern correlations between the first empirical orthogonal function (EOF) of the model simulations and that of the observed precipitation is higher in the Pacemaker experiment than in the CGCM or AGCM experiments over a large region (40°E-80°W, 20°S-30°N). The temporal correlation between the first principal component of the model simulation and the observations is also higher for the Pacemaker experiment than for the AGCM experiment. The northward/eastward propagation features and the spectral peaks (30-60days) of rainfall are significantly more realistically captured by Pacemaker in comparison to CGCM and AGCM/AMIP. Based on the correlation coefficient between seasonal and pentad EOF1 and the related composite analysis, we have found that the Pacemaker is able to reproduce the relationship between the intraseasonal and interannual variability of the South Asian monsoon. The observed improvement in simulation in the Pacemaker experiment, as compared to the CGCM experiment, illustrates that a simple system having only local air-sea feedback is capable of greater realism than sophisticated coupled models. Springer, 2014 Coupled general circulation model nationallicence Regionally coupled ("Pacemaker”) nationallicence Global atmospheric general circulation model nationallicence Rainfall nationallicence EOF analysis nationallicence Shukla Ravi Center for Ocean-Land-Atmosphere Studies (COLA), 280 Research Hall, George Mason University, 4400 University Drive, 22030, Fairfax, VA, USA aut Kinter III James Center for Ocean-Land-Atmosphere Studies (COLA), 280 Research Hall, George Mason University, 4400 University Drive, 22030, Fairfax, VA, USA aut Climate Dynamics Springer Berlin Heidelberg 44/3-4(2015-02-01), 827-843 0930-7575 44:3-4<827 2015 44 382 https://doi.org/10.1007/s00382-014-2188-3 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/s00382-014-2188-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shukla Ravi Center for Ocean-Land-Atmosphere Studies (COLA), 280 Research Hall, George Mason University, 4400 University Drive, 22030, Fairfax, VA, USA aut NATIONALLICENCE 700 1- Kinter III James Center for Ocean-Land-Atmosphere Studies (COLA), 280 Research Hall, George Mason University, 4400 University Drive, 22030, Fairfax, VA, USA aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/3-4(2015-02-01), 827-843 0930-7575 44:3-4<827 2015 44 382