Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0437.1 |
Changes in the MJO under Greenhouse Gas-Induced Warming in CMIP5 Models | |
Rushley, Stephanie S.1; Kim, Daehyun1; Adames, Angel F.2 | |
2019-02-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:3页码:803-821 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This study investigates changes to the Madden-Julian oscillation (MJO) in response to greenhouse gas-induced warming during the twenty-first century. Changes in the MJO's amplitude, phase speed, and zonal scale are examined in five models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) that demonstrate superior MJO characteristics. Under warming, the CMIP5 models exhibit a robust increase in the spectral power of planetary-scale, intraseasonal, eastward-propagating (MJO) precipitation anomalies (similar to 10.9% K-1). The amplification of MJO variability is accompanied by an increase of the spectral power of the corresponding westward-traveling waves at a similar rate. This suggests that enhanced MJO variability in a warmer climate is likely caused by enhanced background tropical precipitation variability, not by changes in the MJO's stability. All models examined show an increase in the MJO's phase speed (1.8% K-1-4.5% K-1) and a decrease in the MJO's zonal wavenumber (1.0% K-1-3.8% K-1). Using a linear moisture mode framework, this study tests the theory-predicted phase speed changes against the simulated phase speed changes. It is found that the MJO's acceleration in a warmer climate is a result of enhanced horizontal moisture advection by the steepening of the mean meridional moisture gradient and the decrease in zonal wavenumber, which is partially offset by the lengthening of the convective moisture adjustment time scale and the increase in gross dry stability. While the ability of the linear moisture mode framework to explain MJO phase speed changes is model dependent, the theory can accurately predict the phase speed changes in the model ensemble. |
英文关键词 | Dynamics Madden-Julian oscillation Climate change |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000455575000001 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; TROPICAL INTRASEASONAL VARIABILITY ; MOIST STATIC ENERGY ; MARITIME CONTINENT ; VERTICAL STRUCTURE ; CLIMATE-CHANGE ; BASIC-STATE ; WATER-VAPOR ; PART I ; PRECIPITATION |
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/19821 |
专题 | 气候变化 |
作者单位 | 1.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 2.Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Rushley, Stephanie S.,Kim, Daehyun,Adames, Angel F.. Changes in the MJO under Greenhouse Gas-Induced Warming in CMIP5 Models[J]. JOURNAL OF CLIMATE,2019,32(3):803-821. |
APA | Rushley, Stephanie S.,Kim, Daehyun,&Adames, Angel F..(2019).Changes in the MJO under Greenhouse Gas-Induced Warming in CMIP5 Models.JOURNAL OF CLIMATE,32(3),803-821. |
MLA | Rushley, Stephanie S.,et al."Changes in the MJO under Greenhouse Gas-Induced Warming in CMIP5 Models".JOURNAL OF CLIMATE 32.3(2019):803-821. |
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