气候变化领域集成服务门户(CCPortal): Topographic sensitivity of WRF-simulated rainfall patterns over the North West Himalayan region

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DOI	10.1016/j.atmosres.2020.105003
	Topographic sensitivity of WRF-simulated rainfall patterns over the North West Himalayan region
	Navale A.; Singh C.
发表日期	2020
ISSN	0169-8095
卷号	242
英文摘要	The present study investigates the effect of topography on the rainfall pattern of the North West Himalayan (NWH) region. The Weather Research and Forecasting (WRF) model is employed for conducting four dedicated experiments with varying topography at regional scale, which are assessed with respect to the control experiment of no-change in topography. Categorical validation analysis carried out for the control experiment against the satellite based observational dataset from the Global Precipitation Measurement and Indian National Satellite System, suggests that WRF has reasonable skill in simulating the fine scale (5 km spatial resolution) rainfall pattern over the NWH region. Furthermore, the WRF experiments show that local changes in the topography limited over Himachal Pradesh and Uttarakhand regions result in significant changes to the fine scale rainfall pattern over Himachal Pradesh and Uttarakhand, while the broad scale pattern of rainfall over the rest of the Indian subcontinent remains unaltered. Also the meridional tropospheric temperature gradient did not show any substantial variation as a result of the localised changes in the topography. The WRF model is capable of simulating heavy rainfall along the steep windward slopes as seen in various topographic sensitivity experiments of this study. Analysis of a high rainfall event over Chamoli (Uttarakhand) on 11 July 2017 showed that atmospheric profiles of relative humidity, CAPE, and horizontal and vertical wind speed vary significantly in response to the changes in the topography. It is therefore suggested that the topographic setup of a region plays a major role in shaping up spatial rainfall variability rather than the terrain height alone. © 2020 Elsevier B.V.
英文关键词	Monsoon; NWH; Orographic rainfall; Topography; WRF
语种	英语
scopus关键词	Atmospheric humidity; Rain; Weather forecasting; Wind; Control experiments; Global precipitation measurements; Indian subcontinents; Spatial rainfall variabilities; Substantial variations; Tropospheric temperature; Validation analysis; Weather research and forecasting models; Topography; data set; experimental study; precipitation assessment; rainfall; relative humidity; temperature gradient; topography; troposphere; weather forecasting; wind velocity; Chamoli; Himachal Pradesh; Himalayas; India; Uttarakhand
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141893
作者单位	Marine and Atmospheric Sciences Department, Indian Institute of Remote Sensing, ISRO, Dehradun, India; Currently at CSRE, IIT Bombay, Mumbai, India
推荐引用方式 GB/T 7714	Navale A.,Singh C.. Topographic sensitivity of WRF-simulated rainfall patterns over the North West Himalayan region[J],2020,242.
APA	Navale A.,&Singh C..(2020).Topographic sensitivity of WRF-simulated rainfall patterns over the North West Himalayan region.Atmospheric Research,242.
MLA	Navale A.,et al."Topographic sensitivity of WRF-simulated rainfall patterns over the North West Himalayan region".Atmospheric Research 242(2020).