globalchange  > 气候减缓与适应
DOI: 10.1007/s00382-018-4209-0
WOS记录号: WOS:000460902200016
论文题名:
Mid-Western US heavy summer-precipitation in regional and global climate models: the impact on model skill and consensus through an analogue lens
作者: Gao, Xiang; Schlosser, C. Adam
通讯作者: Gao, Xiang
刊名: CLIMATE DYNAMICS
ISSN: 0930-7575
EISSN: 1432-0894
出版年: 2019
卷: 52, 期:3-4, 页码:1569-1582
语种: 英语
英文关键词: Extreme precipitation ; Climate change ; Regional climate model ; General circulation model ; Model evaluation
WOS关键词: NORTH-AMERICA ; SEASONAL PRECIPITATION ; HORIZONTAL RESOLUTION ; SIMULATION ; ENSEMBLE ; EXTREMES ; CORDEX ; RAINFALL ; EVENTS ; CMIP5
WOS学科分类: Meteorology & Atmospheric Sciences
WOS研究方向: Meteorology & Atmospheric Sciences
英文摘要:

Regional climate models (RCMs) can simulate heavy precipitation more accurately than general circulation models (GCMs) through more realistic representation of topography and mesoscale processes. Analogue methods of downscaling, which identify the large-scale atmospheric conditions associated with heavy precipitation, can also produce more accurate and precise heavy precipitation frequency in GCMs than the simulated precipitation. In this study, we examine the performances of the analogue method versus direct simulation, when applied to RCM and GCM simulations, in detecting present-day and future changes in summer (JJA) heavy precipitation over the Midwestern United States. We find analogue methods are comparable to MERRA-2 and its bias-corrected precipitation in characterizing the occurrence and interannual variations of observed heavy precipitation events, all significantly improving upon MERRA precipitation. For the late twentieth-century heavy precipitation frequency, RCM precipitation improves upon the corresponding driving GCM with greater accuracy yet comparable inter-model discrepancies, while both RCM- and GCM-based analogue results outperform their model-simulated precipitation counterparts in terms of accuracy and model consensus. For the projected trends in heavy precipitation frequency through the mid twenty-first century, analogue method also manifests its superiority to direct simulation with reduced intermodel disparities, while the RCM-based analogue and simulated precipitation do not demonstrate a salient improvement (in model consensus) over the GCM-based assessment. However, a number of caveats preclude any overall judgement, and further workover any region of interestshould include a larger sample of GCMs and RCMs as well as ensemble simulations to comprehensively account for internal variability.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/125291
Appears in Collections:气候减缓与适应

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作者单位: MIT, Joint Program Sci & Policy Global Change, 77 Massachusetts Ave, Cambridge, MA 02139 USA

Recommended Citation:
Gao, Xiang,Schlosser, C. Adam. Mid-Western US heavy summer-precipitation in regional and global climate models: the impact on model skill and consensus through an analogue lens[J]. CLIMATE DYNAMICS,2019-01-01,52(3-4):1569-1582
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