Climate Change Data Portal
| DOI | 10.5194/acp-20-3809-2020 |
| Description and Evaluation of the specified-dynamics experiment in the Chemistry-Climate Model Initiative | |
| Orbe C.; Plummer D.; Waugh D.; Yang H.; Jöckel P.; Kinnison D.; Josse B.; Marecal V.; Deushi M.; Luke Abraham N.; Archibald A.; Chipperfield M.; Dhomse S.; Feng W.; Bekki S. | |
| 发表日期 | 2020 |
| ISSN | 16807316 |
| 起始页码 | 3809 |
| 结束页码 | 3840 |
| 卷号 | 20期号:6 |
| 英文摘要 | We provide an overview of the REF-C1SD specified-dynamics experiment that was conducted as part of phase 1 of the Chemistry-Climate Model Initiative (CCMI). The REF-C1SD experiment, which consisted of mainly nudged general circulation models (GCMs) constrained with (re)analysis fields, was designed to examine the influence of the large-scale circulation on past trends in atmospheric composition. The REF-C1SD simulations were produced across various model frameworks and are evaluated in terms of how well they represent different measures of the dynamical and transport circulations. In the troposphere there are large (ĝ1/440 %) differences in the climatological mean distributions, seasonal cycle amplitude, and trends of the meridional and vertical winds. In the stratosphere there are similarly large (ĝ1/450 %) differences in the magnitude, trends and seasonal cycle amplitude of the transformed Eulerian mean circulation and among various chemical and idealized tracers. At the same time, interannual variations in nearly all quantities are very well represented, compared to the underlying reanalyses. We show that the differences in magnitude, trends and seasonal cycle are not related to the use of different reanalysis products; rather, we show they are associated with how the simulations were implemented, by which we refer both to how the large-scale flow was prescribed and to biases in the underlying free-running models. In most cases these differences are shown to be as large or even larger than the differences exhibited by free-running simulations produced using the exact same models, which are also shown to be more dynamically consistent. Overall, our results suggest that care must be taken when using specified-dynamics simulations to examine the influence of large-scale dynamics on composition. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. |
| 关键词 | amplitudeatmospheric chemistryatmospheric dynamicschemical compositionclimate modelingexperimentgeneral circulation modelseasonalitywind |
| 语种 | 英语 |
| 来源机构 | Atmospheric Chemistry and Physics |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/132128 |
| 推荐引用方式 GB/T 7714 | Orbe C.,Plummer D.,Waugh D.,et al. Description and Evaluation of the specified-dynamics experiment in the Chemistry-Climate Model Initiative[J]. Atmospheric Chemistry and Physics,2020,20(6). |
| APA | Orbe C..,Plummer D..,Waugh D..,Yang H..,Jöckel P..,...&Bekki S..(2020).Description and Evaluation of the specified-dynamics experiment in the Chemistry-Climate Model Initiative.,20(6). |
| MLA | Orbe C.,et al."Description and Evaluation of the specified-dynamics experiment in the Chemistry-Climate Model Initiative".20.6(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
