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| DOI | 10.1007/s00382-020-05590-y |
| Effect of atmospheric circulation on surface air temperature trends in years 1979–2018 | |
| Räisänen J. | |
| 发表日期 | 2021 |
| ISSN | 0930-7575 |
| 卷号 | 56期号:2021-07-08 |
| 英文摘要 | The effect of atmospheric circulation on monthly, seasonal and annual mean surface air temperature trends in the years 1979–2018 is studied by applying a trajectory-based method on the European Centre for Medium-Range Weather Forecasts ERA5 reanalysis data. To the extent that the method captures the effects of atmospheric circulation, the results suggest that circulation trends only had a minor impact on observed annual mean temperature trends in most areas. Exceptions include, for example, a decrease in annual mean warming by about 1 °C in western Siberia, and increased warming in central Europe and the Arctic Ocean. However, the effect of circulation trends on seasonal and particularly monthly temperature trends is more substantial. Subtracting the effect of circulation changes from the ERA5 temperature trends leaves residual trends with a smoother annual cycle than the original trends. The residual monthly mean temperature trends also tend to agree better with the multi-model mean temperature trends from models in the 5th Coupled Model Intercomparison Project (CMIP5) than the original ERA5 trends do, with a 42% decrease in the mean square difference over the global land area. However, the corresponding decrease in the mean square difference of the annual mean temperature trends is only 6%. © 2021, The Author(s). |
| 英文关键词 | Atmospheric circulation; Climate change; CMIP5; ERA5; Surface air temperature; Trajectory |
| 来源期刊 | Climate Dynamics
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/183347 |
| 作者单位 | Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, FI-00014 University of Helsinki, P.O. Box 64, Helsinki, Finland |
| 推荐引用方式 GB/T 7714 | Räisänen J.. Effect of atmospheric circulation on surface air temperature trends in years 1979–2018[J],2021,56(2021-07-08). |
| APA | Räisänen J..(2021).Effect of atmospheric circulation on surface air temperature trends in years 1979–2018.Climate Dynamics,56(2021-07-08). |
| MLA | Räisänen J.."Effect of atmospheric circulation on surface air temperature trends in years 1979–2018".Climate Dynamics 56.2021-07-08(2021). |
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