globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-015-2484-6
Scopus记录号: 2-s2.0-84946480972
论文题名:
Improvements in the representation of the Indian summer monsoon in the NCEP climate forecast system version 2
作者: Bombardi R.J.; Schneider E.K.; Marx L.; Halder S.; Singh B.; Tawfik A.B.; Dirmeyer P.A.; Kinter J.L.; III
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期:2017-09-10
起始页码: 2485
结束页码: 2498
语种: 英语
英文关键词: CFSv2 ; Convection ; Indian summer monsoon ; Seasonal predictability ; Trigger function
英文摘要: 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. © 2015, Springer-Verlag Berlin Heidelberg.
资助项目: MoES, National Aeronautics and Space Administration ; NSF, National Aeronautics and Space Administration ; NSF, National Aeronautics and Space Administration ; NOAA, National Aeronautics and Space Administration ; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53939
Appears in Collections:过去全球变化的重建

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作者单位: Department of Atmospheric, Oceanic, and Earth Sciences, College of Science, George Mason University, 4400 University Drive, Fairfax, VA, United States; Center for Ocean–Land–Atmosphere Studies, Institute of Global Environment and Society, Calverton, MA, United States

Recommended Citation:
Bombardi R.J.,Schneider E.K.,Marx L.,et al. Improvements in the representation of the Indian summer monsoon in the NCEP climate forecast system version 2[J]. Climate Dynamics,2015-01-01,45(2017-09-10)
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