Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3130-7 |
The Alpine snow-albedo feedback in regional climate models | |
Winter, Kevin J. -P. M.1; Kotlarski, Sven1,2; Scherrer, Simon C.2; Schar, Christoph1 | |
2017-02-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland |
英文摘要 | The effect of the snow-albedo feedback (SAF) on 2m temperatures and their future changes in the European Alps is investigated in the ENSEMBLES regional climate models (RCMs) with a focus on the spring season. A total of 14 re-analysis-driven RCM experiments covering the period 1961-2000 and 10 GCM-driven transient climate change projections for 1950-2099 are analysed. A positive springtime SAF is found in all RCMs, but the range of the diagnosed SAF is large. Results are compared against an observation-based SAF estimate. For some RCMs, values very close to this estimate are found; other models show a considerable overestimation of the SAF. Net shortwave radiation has the largest influence of all components of the energy balance on the diagnosed SAF and can partly explain its spatial variability. Model deficiencies in reproducing 2m temperatures above snow and ice and associated cold temperature biases at high elevations seem to contribute to a SAF overestimation in several RCMs. The diagnosed SAF in the observational period strongly influences the estimated SAF contribution to twenty first century temperature changes in the European Alps. This contribution is subject to a clear elevation dependency that is governed by the elevation-dependent change in the number of snow days. Elevations of maximum SAF contribution range from 1500 to 2000 m in spring and are found above 2000 m in summer. Here, a SAF contribution to the total simulated temperature change between 0 and 0.5 A degrees C until 2099 (multi-model mean in spring: 0.26 A degrees C) or 0 and 14 % (multi-model mean in spring: 8 %) is obtained for models showing a realistic SAF. These numbers represent a well-funded but only approximate estimate of the SAF contribution to future warming, and a remaining contribution of model-specific SAF misrepresentations cannot be ruled out. |
英文关键词 | Snow-albedo feedback European Alps Regional climate models ENSEMBLES Climate change |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394150500023 |
WOS关键词 | EURO-CORDEX ; LOCAL-SCALE ; VARIABILITY ; TRENDS |
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/36105 |
专题 | 气候变化 |
作者单位 | 1.ETH, Inst Atmospher & Climate Sci, Zurich, Switzerland; 2.Fed Off Meteorol & Climatol MeteoSwiss, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Winter, Kevin J. -P. M.,Kotlarski, Sven,Scherrer, Simon C.,et al. The Alpine snow-albedo feedback in regional climate models[J]. CLIMATE DYNAMICS,2017,48. |
APA | Winter, Kevin J. -P. M.,Kotlarski, Sven,Scherrer, Simon C.,&Schar, Christoph.(2017).The Alpine snow-albedo feedback in regional climate models.CLIMATE DYNAMICS,48. |
MLA | Winter, Kevin J. -P. M.,et al."The Alpine snow-albedo feedback in regional climate models".CLIMATE DYNAMICS 48(2017). |
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