气候变化领域集成服务门户(CCPortal): Understanding Differences in California Climate Projections Produced by Dynamical and Statistical Downscaling

CCPortal

DOI	10.1029/2020JD032812
	Understanding Differences in California Climate Projections Produced by Dynamical and Statistical Downscaling
	Walton D.; Berg N.; Pierce D.; Maurer E.; Hall A.; Lin Y.-H.; Rahimi S.; Cayan D.
发表日期	2020
ISSN	2169897X
卷号	125 期号:19
英文摘要	We compare historical and end-of-century temperature and precipitation patterns over California from one dynamically downscaled simulation using the Weather Research and Forecast (WRF) model and two simulations statistically downscaled using Localized Constructed Analogs (LOCA). We uniquely separate causes of differences between dynamically and statistically based future climate projections into differences in historical climate (gridded observations versus regional climate model output) and differences in how these downscaling techniques explicitly handle future climate changes (numerical modeling versus analogs). In these methods, solutions between different downscaling techniques differ more in the future compared to the historical period. Changes projected by LOCA are insensitive to the choice of driving data. Only through dynamical downscaling can we simulate physically consistent regional springtime warming patterns across the Sierra Nevada, while the statistical simulations inherit an unphysical signal from their parent Global Climate Model (GCM) or gridded data. The results of our study clarify why these different techniques produce different outcomes and may also provide guidance on which downscaled products to use for certain impact analyses in California and perhaps other Mediterranean regimes. ©2020. The Authors.
英文关键词	California; downscaling; regional climate; snow albedo feedback
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185731
作者单位	Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, CA, United States; Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States; Civil Engineering Department, University of Santa Clara, Santa Clara, CA, United States
推荐引用方式 GB/T 7714	Walton D.,Berg N.,Pierce D.,et al. Understanding Differences in California Climate Projections Produced by Dynamical and Statistical Downscaling[J],2020,125(19).
APA	Walton D..,Berg N..,Pierce D..,Maurer E..,Hall A..,...&Cayan D..(2020).Understanding Differences in California Climate Projections Produced by Dynamical and Statistical Downscaling.Journal of Geophysical Research: Atmospheres,125(19).
MLA	Walton D.,et al."Understanding Differences in California Climate Projections Produced by Dynamical and Statistical Downscaling".Journal of Geophysical Research: Atmospheres 125.19(2020).