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| DOI | 10.1088/1748-9326/ab7e4f |
| Reductions in daily continental-scale atmospheric circulation biases between generations of global climate models: CMIP5 to CMIP6 | |
| Cannon A.J. | |
| 发表日期 | 2020 |
| ISSN | 17489318 |
| 卷号 | 15期号:6 |
| 英文摘要 | This study evaluates and compares historical simulations of daily sea-level pressure circulation types over 6 continental-scale regions (North America, South America, Europe, Africa, East Asia, and Australasia) by 15 pairs of global climate models from modeling centers that contributed to both Coupled Model Intercomparison Project Phase 5 (CMIP5) and CMIP6. Atmospheric circulation classifications are constructed using two different methodologies applied to two reanalyses. Substantial improvements in performance, taking into account internal variability, are found between CMIP5 and CMIP6 for both frequency (24% reduction in global error) and persistence (12% reduction) of circulation types. Improvements between generations are robust to different methodological choices and reference datasets. A modest relationship between model resolution and skill is found. While there is large intra-ensemble spread in performance, the best performing models from CMIP6 exhibit levels of skill close to those from the reanalyses. In general, the latest generation of climate models should provide less biased simulations for use in regional dynamical and statistical downscaling efforts than previous generations. © 2020 Canadian Crown copyright. |
| 英文关键词 | atmospheric circulation; climate model; global climate; model evaluation; regional climate |
| 语种 | 英语 |
| scopus关键词 | Climatology; Sea level; Atmospheric circulation; Atmospheric circulation classifications; Coupled Model Intercomparison Project; Daily sea-level pressures; Global climate model; Historical simulation; Internal variability; Statistical downscaling; Climate models; atmospheric circulation; CMIP; error analysis; global climate; historical record; performance assessment; sea level pressure; Africa; Australasia; Europe; Far East; North America; South America |
| 来源期刊 | Environmental Research Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/154017 |
| 作者单位 | Climate Research Division, Environment and Climate Change Canada, Victoria, BC, Canada |
| 推荐引用方式 GB/T 7714 | Cannon A.J.. Reductions in daily continental-scale atmospheric circulation biases between generations of global climate models: CMIP5 to CMIP6[J],2020,15(6). |
| APA | Cannon A.J..(2020).Reductions in daily continental-scale atmospheric circulation biases between generations of global climate models: CMIP5 to CMIP6.Environmental Research Letters,15(6). |
| MLA | Cannon A.J.."Reductions in daily continental-scale atmospheric circulation biases between generations of global climate models: CMIP5 to CMIP6".Environmental Research Letters 15.6(2020). |
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