globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2017JD026564
论文题名:
Evaluating hourly rainfall characteristics over the U.S. Great Plains in dynamically downscaled climate model simulations using NASA-Unified WRF
作者: Lee H.; Waliser D.E.; Ferraro R.; Iguchi T.; Peters-Lidard C.D.; Tian B.; Loikith P.C.; Wright D.B.
刊名: Journal of Geophysical Research: Atmospheres
出版年: 2017
卷: 122, 期:14
起始页码: 7371
结束页码: 7384
语种: 英语
英文关键词: climate model evaluation ; high-resolution dynamical downscaling ; NASA-Unified WRF ; precipitation over the Great Plains ; regional climate model
英文摘要: Accurate simulation of extreme precipitation events remains a challenge in climate models. This study utilizes hourly precipitation data from ground stations and satellite instruments to evaluate rainfall characteristics simulated by the NASA-Unified Weather Research and Forecasting (NU-WRF) regional climate model at horizontal resolutions of 4, 12, and 24 km over the Great Plains of the United States. We also examined the sensitivity of the simulated precipitation to different spectral nudging approaches and the cumulus parameterizations. The rainfall characteristics in the observations and simulations were defined as an hourly diurnal cycle of precipitation and a joint probability distribution function (JPDF) between duration and peak intensity of precipitation events over the Great Plains in summer. We calculated a JPDF for each data set and the overlapping area between observed and simulated JPDFs to measure the similarity between the two JPDFs. Comparison of the diurnal precipitation cycles between observations and simulations does not reveal the added value of high-resolution simulations. However, the performance of NU-WRF simulations measured by the JPDF metric strongly depends on horizontal resolution. The simulation with the highest resolution of 4 km shows the best agreement with the observations in simulating duration and intensity of wet spells. Spectral nudging does not affect the JPDF significantly. The effect of cumulus parameterizations on the JPDFs is considerable but smaller than that of horizontal resolution. The simulations with lower resolutions of 12 and 24 km show reasonable agreement but only with the high-resolution observational data that are aggregated into coarse resolution and spatially averaged. ©2017. American Geophysical Union. All Rights Reserved.
资助项目: "This work was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. We thank Tsengdar Lee at the NASA Headquarters for leading the NASA downscaling project. The two observational data sets, Stage IV (http://www.emc.ncep.noaa.gov/mmb/ylin/pcpanl/stage4/) and GPM (https://pmm.nasa.gov/data-access/downloads/gpm), were obtained freely online. The NU-WRF simulation data can be accessed via the supercomputers managed by NASA Center for Climate Simulation (NCCS, https://www.nccs.nasa.gov/) after obtaining a NCCS account. Copyright 2017. All rights reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62631
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Geography, Portland State University, Portland, OR, United States; Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, United States

Recommended Citation:
Lee H.,Waliser D.E.,Ferraro R.,et al. Evaluating hourly rainfall characteristics over the U.S. Great Plains in dynamically downscaled climate model simulations using NASA-Unified WRF[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(14)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Lee H.]'s Articles
[Waliser D.E.]'s Articles
[Ferraro R.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Lee H.]'s Articles
[Waliser D.E.]'s Articles
[Ferraro R.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Lee H.]‘s Articles
[Waliser D.E.]‘s Articles
[Ferraro R.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.