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DOI | 10.1175/JCLI-D-19-0007.1 |
Separating Dynamic and Thermodynamic Impacts of Climate Change on Daytime Convective Development over Land | |
Grabowski, Wojciech W.; Prein, Andreas F. | |
2019-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:16页码:5213-5234 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Climate change affects the dynamics and thermodynamics of moist convection. Changes in the dynamics concern, for instance, an increase of convection strength due to increases of convective available potential energy (CAPE). Thermodynamics involve increases in water vapor that the warmer atmosphere can hold and convection can work with. Small-scale simulations are conducted to separate these two components for daytime development of unorganized convection over land. The simulations apply a novel modeling technique referred to as the piggybacking (or master-slave) approach and consider the global climate model (GCM)-predicted change of atmospheric temperature and moisture profiles in the Amazon region at the end of the century under a business-as-usual scenario. The simulations show that the dynamic impact dominates because changes in cloudiness and rainfall come from cloud dynamics considerations, such as the change in CAPE and convective inhibition (CIN) combined with the impact of environmental relative humidity (RH) on deep convection. The small RH reduction between the current and future climate significantly affects the mean surface rain accumulation as it changes from a small reduction to a small increase when the RH decrease is eliminated. The thermodynamic impact on cloudiness and precipitation is generally small, with the extreme rainfall intensifying much less than expected from an atmospheric moisture increase. These results are discussed in the context of previous studies concerning climate change-induced modifications of moist convection. Future research directions applying the piggybacking method are discussed. |
英文关键词 | Convection Climate change Cloud resolving models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000476906300001 |
WOS关键词 | UNTANGLING MICROPHYSICAL IMPACTS ; DEEP CONVECTION ; PRECIPITATION EXTREMES ; MOIST CONVECTION ; FUTURE CHANGES ; RESOLUTION ; SHALLOW ; MODELS ; TRANSITION ; INTENSIFICATION |
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/185736 |
专题 | 气候变化 |
作者单位 | Natl Ctr Atmospher Res, Mesoscale & Microscale Meteorol Lab, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Grabowski, Wojciech W.,Prein, Andreas F.. Separating Dynamic and Thermodynamic Impacts of Climate Change on Daytime Convective Development over Land[J]. JOURNAL OF CLIMATE,2019,32(16):5213-5234. |
APA | Grabowski, Wojciech W.,&Prein, Andreas F..(2019).Separating Dynamic and Thermodynamic Impacts of Climate Change on Daytime Convective Development over Land.JOURNAL OF CLIMATE,32(16),5213-5234. |
MLA | Grabowski, Wojciech W.,et al."Separating Dynamic and Thermodynamic Impacts of Climate Change on Daytime Convective Development over Land".JOURNAL OF CLIMATE 32.16(2019):5213-5234. |
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