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DOI | 10.1007/s00382-019-04959-y |
Dynamical downscaling over the complex terrain of southwest South America: present climate conditions and added value analysis | |
Bozkurt, Deniz1; Rojas, Maisa1,2; Pablo Boisier, Juan1; Rondanelli, Roberto1,2; Garreaud, Rene1,2; Gallardo, Laura1,2 | |
2019-12-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53期号:11页码:6745-6767 |
文章类型 | Article |
语种 | 英语 |
国家 | Chile |
英文摘要 | This study evaluates hindcast simulations performed with a regional climate model (RCM, RegCM4) driven by reanalysis data (ERA-Interim) over the Pacific coast and Andes Cordillera of extratropical South America. A nested domain configuration at 0.44. ( similar to 50 km) and 0.09 degrees. (similar to 10 km) spatial resolutions is used for the simulations. RegCM4 is also driven by a global climate model (GCM, MPI-ESM-MR) on the same domain configuration to asses the added values for temperature and precipitation (historical simulations). Overall, both 10 km hindcast and historical simulation results are promising and exhibit a better representation of near-surface air temperature and precipitation variability compared to the 50 km simulations. High-resolution simulations suppress an overestimation of precipitation over the Andes Cordillera of northern Chile found with the 50 km simulations. The simulated daily temperature and precipitation extreme indices from 10 km hindcast simulation show a closer estimation of the observed fields. A persistent warm bias (similar to + 4 degrees C) over the Atacama Desert in 10 km hindcast simulation reveals the complexity in representing land surface and radiative processes over the desert. Difficulties in capturing the temperature trend in northern Chile are notable for both hindcast simulations. Both resolutions exhibit added values for temperature and precipitation over large parts of Chile, in particular, the 10 km resolves the coastal-valley Andes transitions over central Chile. Our results highlight that resolutions coarser than 50 km (e.g., GCMs and reanalysis) miss important climate gradients imposed by complex topography. Given that the highest spatial resolution of the current regional simulations over the South America is about 50 km, higher resolutions are important to improve our understanding of the dynamical processes that determine climate over complex terrain and extreme environments. |
英文关键词 | Model evaluation Temporal-spatial scale analysis Climate variability Chile Patagonia Atacama Desert |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000494681900015 |
WOS关键词 | AIR-POLLUTION ; CENTRAL CHILE ; MODEL REGCM2 ; RESOLUTION ; PRECIPITATION ; IMPACT ; PERFORMANCE ; HYDROCLIMATE ; ASSIMILATION ; MEGADROUGHT |
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/224262 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Chile, Ctr Climate & Resilience Res, Santiago, Chile; 2.Univ Chile, Dept Geophys, Santiago, Chile |
推荐引用方式 GB/T 7714 | Bozkurt, Deniz,Rojas, Maisa,Pablo Boisier, Juan,et al. Dynamical downscaling over the complex terrain of southwest South America: present climate conditions and added value analysis[J]. CLIMATE DYNAMICS,2019,53(11):6745-6767. |
APA | Bozkurt, Deniz,Rojas, Maisa,Pablo Boisier, Juan,Rondanelli, Roberto,Garreaud, Rene,&Gallardo, Laura.(2019).Dynamical downscaling over the complex terrain of southwest South America: present climate conditions and added value analysis.CLIMATE DYNAMICS,53(11),6745-6767. |
MLA | Bozkurt, Deniz,et al."Dynamical downscaling over the complex terrain of southwest South America: present climate conditions and added value analysis".CLIMATE DYNAMICS 53.11(2019):6745-6767. |
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