DOI: 10.1007/s00382-017-3781-z
Scopus记录号: 2-s2.0-85021790960
论文题名: Reanalysis of the Indian summer monsoon: four dimensional data assimilation of AIRS retrievals in a regional data assimilation and modeling framework
作者: Attada R. ; Parekh A. ; Chowdary J.S. ; Gnanaseelan C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-07-08 起始页码: 2905
结束页码: 2923
语种: 英语
英文关键词: AIRS profiles
; Four dimensional data assimilation
; Indian summer monsoon
; Regional model
英文摘要: This work is the first attempt to produce a multi-year downscaled regional reanalysis of the Indian summer monsoon (ISM) using the National Centers for Environmental Prediction (NCEP) operational analyses and Atmospheric Infrared Sounder (AIRS) version 5 temperature and moisture retrievals in a regional model. Reanalysis of nine monsoon seasons (2003–2011) are produced in two parallel setups. The first set of experiments simply downscale the original NCEP operational analyses, whilst the second one assimilates the AIRS temperature and moisture profiles. The results show better representation of the key monsoon features such as low level jet, tropical easterly jet, subtropical westerly jet, monsoon trough and the spatial pattern of precipitation when AIRS profiles are assimilated (compared to those without AIRS data assimilation). The distribution of temperature, moisture and meridional gradients of dynamical and thermodynamical fields over the monsoon region are better represented in the reanalysis that assimilates AIRS profiles. The change induced by AIRS data on the moist and thermodynamic conditions results in more realistic rendering of the vertical shear associated with the monsoon, which in turn leads to a proper moisture transport and the moist convective feedback. This feedback benefits the representation of the regional monsoon characteristics, the monsoon dynamics and the moist convective processes on the seasonal time scale. This study emphasizes the use of AIRS soundings for downscaling of ISM representation in a regional reanalysis. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109375
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Theoretical Studies Division, Indian Institute of Tropical Meteorology, Pune, 411 008, India; King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
Recommended Citation:
Attada R.,Parekh A.,Chowdary J.S.,et al. Reanalysis of the Indian summer monsoon: four dimensional data assimilation of AIRS retrievals in a regional data assimilation and modeling framework[J]. Climate Dynamics,2018-01-01,50(2018-07-08)