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DOI | 10.1007/s00382-017-3723-9 |
Investigating added value of regional climate modeling in North American winter storm track simulations | |
Poan, E. D.1; Gachon, P.2; Laprise, R.1; Aider, R.3; Dueymes, G.1 | |
2018-03-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:1799-1818 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Extratropical Cyclone (EC) characteristics depend on a combination of large-scale factors and regional processes. However, the latter are considered to be poorly represented in global climate models (GCMs), partly because their resolution is too coarse. This paper describes a framework using possibilities given by regional climate models (RCMs) to gain insight into storm activity during winter over North America (NA). Recent past climate period (1981-2005) is considered to assess EC activity over NA using the NCEP regional reanalysis (NARR) as a reference, along with the European reanalysis ERA-Interim (ERAI) and two CMIP5 GCMs used to drive the Canadian Regional Climate Model-version 5 (CRCM5) and the corresponding regional-scale simulations. While ERAI and GCM simulations show basic agreement with NARR in terms of climatological storm track patterns, detailed bias analyses show that, on the one hand, ERAI presents statistically significant positive biases in terms of EC genesis and therefore occurrence while capturing their intensity fairly well. On the other hand, GCMs present large negative intensity biases in the overall NA domain and particularly over NA eastern coast. In addition, storm occurrence over the northwestern topographic regions is highly overestimated. When the CRCM5 is driven by ERAI, no significant skill deterioration arises and, more importantly, all storm characteristics near areas with marked relief and over regions with large water masses are significantly improved with respect to ERAI. Conversely, in GCM-driven simulations, the added value contributed by CRCM5 is less prominent and systematic, except over western NA areas with high topography and over the Western Atlantic coastlines where the most frequent and intense ECs are located. Despite this significant added-value on seasonal-mean characteristics, a caveat is raised on the RCM ability to handle storm temporal 'seriality', as a measure of their temporal variability at a given location. In fact, the driving models induce some significant footprints on the RCM skill to reproduce the intra-seasonal pattern of storm activity. |
英文关键词 | Regional climate model Added value Storm tracking Temporal seriality |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426707100019 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; MULTISCALE GEM MODEL ; PART I ; PERFORMANCE ; CYCLONES ; CYCLOGENESIS ; SENSITIVITY ; FREQUENCIES ; CHALLENGES ; DYNAMICS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35662 |
专题 | 气候变化 |
作者单位 | 1.Univ Quebec Montreal, Ctr ESCER, Dept Sci Terre & Atmosphere, Stn Downtown, POB 8888, Montreal, PQ H3C 3P8, Canada; 2.Univ Quebec, ESCER Res Ctr, Dept Geog, Montreal, PQ, Canada; 3.Environm & Climate Change Canada, Rech Previs Numer, Montreal, PQ, Canada |
推荐引用方式 GB/T 7714 | Poan, E. D.,Gachon, P.,Laprise, R.,et al. Investigating added value of regional climate modeling in North American winter storm track simulations[J]. CLIMATE DYNAMICS,2018,50:1799-1818. |
APA | Poan, E. D.,Gachon, P.,Laprise, R.,Aider, R.,&Dueymes, G..(2018).Investigating added value of regional climate modeling in North American winter storm track simulations.CLIMATE DYNAMICS,50,1799-1818. |
MLA | Poan, E. D.,et al."Investigating added value of regional climate modeling in North American winter storm track simulations".CLIMATE DYNAMICS 50(2018):1799-1818. |
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