caa a22 4500 605472750 CHVBK 20210128100339.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00382-015-2484-6 doi (NATIONALLICENCE)springer-10.1007/s00382-015-2484-6 Improvements in the representation of the Indian summer monsoon in the NCEP climate forecast system version 2 [Elektronische Daten] [Rodrigo Bombardi, Edwin Schneider, Lawrence Marx, Subhadeep Halder, Bohar Singh, Ahmed Tawfik, Paul Dirmeyer, James Kinter III] A new triggering mechanism for deep convection based on the heated condensation framework (HCF) is implemented into the National Centers for Environmental Prediction climate forecast system version 2 (CFSv2). The new trigger is added as an additional criterion in the simplified Arakawa-Schubert scheme for deep convection. Seasonal forecasts are performed to evaluate the influence of the new triggering mechanism in the representation of the Indian summer monsoon in the CFSv2. The HCF trigger improves the seasonal representation of precipitation over the Indian subcontinent. The new triggering mechanism leads to a significant, albeit relatively small, improvement in the bias of seasonal precipitation totals. In addition, the new trigger improves the representation of the seasonal precipitation cycle including the monsoon onset, and the probability distribution of precipitation intensities. The mechanism whereby the HCF improves convection over India seems to be related not only to a better representation of the background state of atmospheric convection but also to an increase in the frequency in which SAS is triggered. As a result, there was an increase in convective precipitation over India favored by the availability of moist convective instability. The increase in precipitation intensity leads to a reduction in the dry bias. Springer-Verlag Berlin Heidelberg, 2015 Trigger function nationallicence CFSv2 nationallicence Indian summer monsoon nationallicence Seasonal predictability nationallicence Convection nationallicence Bombardi Rodrigo Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut Schneider Edwin Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut Marx Lawrence Center for Ocean-Land-Atmosphere Studies, Institute of Global Environment and Society, Calverton, MA, USA aut Halder Subhadeep Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut Singh Bohar Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut Tawfik Ahmed Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut Dirmeyer Paul Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut Kinter III James Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut Climate Dynamics Springer Berlin Heidelberg 45/9-10(2015-11-01), 2485-2498 0930-7575 45:9-10<2485 2015 45 382 https://doi.org/10.1007/s00382-015-2484-6 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/s00382-015-2484-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bombardi Rodrigo Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut NATIONALLICENCE 700 1- Schneider Edwin Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut NATIONALLICENCE 700 1- Marx Lawrence Center for Ocean-Land-Atmosphere Studies, Institute of Global Environment and Society, Calverton, MA, USA aut NATIONALLICENCE 700 1- Halder Subhadeep Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut NATIONALLICENCE 700 1- Singh Bohar Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut NATIONALLICENCE 700 1- Tawfik Ahmed Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut NATIONALLICENCE 700 1- Dirmeyer Paul Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut NATIONALLICENCE 700 1- Kinter III James Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, 22033, Fairfax, VA, USA aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/9-10(2015-11-01), 2485-2498 0930-7575 45:9-10<2485 2015 45 382