Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2021.105681 |
Impact of horizontal resolution on monsoon precipitation for CORDEX-South Asia: A regional earth system model assessment | |
Alok Kumar Mishra, Pankaj Kumar, Aditya Kumar Dubey, Aaquib Javed, ... Daniela Jacob | |
2021-05-14 | |
发表期刊 | Atmospheric Research
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出版年 | 2021 |
英文摘要 | For the first time for CORDEX-South Asia, a high-resolution regional earth system model (ROM) is adopted to assess the impact of horizontal resolution (0.22° and 0.11°) in simulating the Indian summer monsoon rainfall (ISMR) and the underlying spatiotemporal variability. ROM at both resolutions bears a close resemblance to observations in simulating the mean precipitation climatology compared to other regional climate models (RCMs) participated in CORDEX- South Asia. ROM shows substantial improvement relative to the ensemble mean of the RCMs included in CORDEX-South Asia. While comparing both simulations with observations, some systematic wet and dry bias over Central India (CI) and Northern Western Ghats is noticed. In general, the wet/dry bias over India is mainly associated with the overestimation/underestimation of the large-scale/convective component. Increasing horizontal resolution from 0.22° to 0.11° significantly adds value in simulating the JJAS mean precipitation by reducing the wet bias over western central India (WCI) and southern peninsular India and dry bias over eastern CI. The reduction in wet/dry bias is mainly associated with suppression/enhancement of the large scale/convective precipitation. This improvement in mean precipitation is partially due to the improved representation of the propagation of mesoscale systems such as boreal summer intraseasonal oscillation (eastward and northward). Despite the above improvements, the wet precipitation bias, particularly over WCI, persists. The weaker Findlater Jet associated with weaker land-ocean thermal contrast caused by the warm sea surface temperature (SST) bias over the western Arabian Sea (AS) suggests that AS moisture transport does not contribute to the wet bias over India. The wet bias is possibly associated with favourable atmospheric conditions (atmospheric instability). |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/326698 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Alok Kumar Mishra, Pankaj Kumar, Aditya Kumar Dubey, Aaquib Javed, ... Daniela Jacob. Impact of horizontal resolution on monsoon precipitation for CORDEX-South Asia: A regional earth system model assessment[J]. Atmospheric Research,2021. |
APA | Alok Kumar Mishra, Pankaj Kumar, Aditya Kumar Dubey, Aaquib Javed, ... Daniela Jacob.(2021).Impact of horizontal resolution on monsoon precipitation for CORDEX-South Asia: A regional earth system model assessment.Atmospheric Research. |
MLA | Alok Kumar Mishra, Pankaj Kumar, Aditya Kumar Dubey, Aaquib Javed, ... Daniela Jacob."Impact of horizontal resolution on monsoon precipitation for CORDEX-South Asia: A regional earth system model assessment".Atmospheric Research (2021). |
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