Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04941-8 |
Precipitation diurnal cycle over the Maritime Continent modulated by the MJO | |
Lu, Jiahao1; Li, Tim1,2,3; Wang, Lu1 | |
2019-11-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:6489-6501 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The modulation of diurnal cycle of precipitation over the Maritime Continent (MC) by the Madden-Julian Oscillation (MJO) during boreal winter was studied for the period of 1998-2014 using TRMM rainfall and MERRA reanalysis data. The RMM index by Wheeler and Hendon is used to define MJO phases. It is found that there are statistically significant differences in the diurnal cycle amplitude between different MJO phases. The amplitude of precipitation diurnal cycle is largest (smallest) during phases 2-3 (6-7), especially for the diurnal cycle over the western MC. Analysis of the local precipitation budget indicates that vertically integrated horizontal moisture convergence plays an important role in causing the amplitude difference. A further diagnosis indicates that the difference is primarily attributed to the convergence of the MJO-scale moisture by diurnal wind. The enhanced diurnal wind activity during phases 2-3 results from enhanced condensational heating on the diurnal scale, owing to the increase of surface moisture caused by MJO induced boundary layer convergence in front of convection. The increase of the background low-level moisture associated with MJO further promotes a positive circulation-convection feedback to enhance the diurnal cycle activity. Opposite processes operate at phases 6-7. |
英文关键词 | Diurnal cycle Maritime Continent Madden-Julian oscillation Moisture budget diagnosis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493469900075 |
WOS关键词 | SUMMER INTRASEASONAL OSCILLATIONS ; SYNOPTIC-SCALE DISTURBANCES ; SURROUNDING OCEANS ; RAINFALL ; CONVECTION ; VARIABILITY ; SATELLITE ; MONSOON ; ENSO ; CLOUDS |
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/187963 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, CIC FEMD, Joint Int Res Lab Climate & Environm Change ILCEC, Key Lab Meteorol Disaster,Minist Educ KLME, Nanjing, Jiangsu, Peoples R China; 2.Univ Hawaii Manoa, Int Pacific Res Ctr, Sch Ocean & Earth Sci & Technol, Honolulu, HI 96822 USA; 3.Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Dept Atmospher Sci, Honolulu, HI 96822 USA |
推荐引用方式 GB/T 7714 | Lu, Jiahao,Li, Tim,Wang, Lu. Precipitation diurnal cycle over the Maritime Continent modulated by the MJO[J]. CLIMATE DYNAMICS,2019,53:6489-6501. |
APA | Lu, Jiahao,Li, Tim,&Wang, Lu.(2019).Precipitation diurnal cycle over the Maritime Continent modulated by the MJO.CLIMATE DYNAMICS,53,6489-6501. |
MLA | Lu, Jiahao,et al."Precipitation diurnal cycle over the Maritime Continent modulated by the MJO".CLIMATE DYNAMICS 53(2019):6489-6501. |
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