DOI: 10.1007/s00382-017-3860-1
Scopus记录号: 2-s2.0-85027842386
论文题名: High-resolution projections of mean and extreme precipitations over China through PRECIS under RCPs
作者: Zhu J. ; Huang G. ; Wang X. ; Cheng G. ; Wu Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-11-12 起始页码: 4037
结束页码: 4060
语种: 英语
英文关键词: China
; Dynamical downscaling
; Precipitation and extremes
; PRECIS
; RCP4.5 and RCP8.5
Scopus关键词: climate effect
; climate prediction
; downscaling
; global warming
; precipitation (climatology)
; precipitation intensity
; regional climate
; China
; Precis
英文摘要: The impact of global warming on the characteristics of mean and extreme precipitations over China is investigated by using the Providing REgional Climate Impacts for Studies (PRECIS) model. The PRECIS model was driven by the Hadley Centre Global Environment Model version 2 with Earth System components and coupling (HadGEM2-ES). The results of both models are analyzed in terms of mean precipitation and indices of precipitation extremes (R95p, R99p, SDII, WDF, and CWD) over China at the resolution of 25 km under the Representative Concentration Pathways 4.5 and 8.5 (RCP4.5 and RCP8.5) scenarios for the baseline period (1976–2005) and two future periods (2036–2065 and 2070–2099). With improved resolution, the PRECIS model is able to better represent the fine-scale physical process than HadGEM2-ES. It can provide reliable spatial patterns of precipitation and its related extremes with high correlations to observations. Moreover, there is a notable improvement in temporal patterns simulation through the PRECIS model. The PRECIS model better reproduces the regional annual cycle and frequencies of daily precipitation intensity than its driving GCM. Under RCP4.5 and RCP8.5, both the HadGEM2-ES and the precis project increasing annual precipitation over the entire country for two future periods. Precipitation increase in winter is greater than the increase in summer. The results suggest that increased radiative forcing from RCP4.5 to RCP8.5 would further intensify the magnitude of projected precipitation changes by both PRECIS and HadGEM2-ES. For example, some parts of south China with decreased precipitation under RCP4.5 would expect even less precipitation under RCP8.5; regions (northwest, northcentral and northeast China) with increased precipitation under RCP4.5 would expect more precipitation under RCP8.5. Apart from the projected increase in annual total precipitation, the results also suggest that there will be an increase in the days with precipitation higher than 15 mm and a decrease in the days with precipitation less than 5 mm. Under both RCPs, there would be an increasing trend in the magnitude of changes in precipitation extremes indices (R95p, R99p, and SDII) over China, while an opposite trend is projected for CWD and no apparent trend is projected for WDF from 2036–2065 to 2070–2099. Increased extreme precipitation amounts accompanied with decreased frequencies of extreme precipitation suggest that the future daily extreme precipitation intensity is likely to become large in northeast China and south China. © 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/109291
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: Institute for Energy, Environment and Sustainability Research, University of Regina, Regina, SK S4S 0A2, Canada
Recommended Citation:
Zhu J.,Huang G.,Wang X.,et al. High-resolution projections of mean and extreme precipitations over China through PRECIS under RCPs[J]. Climate Dynamics,2018-01-01,50(2018-11-12)