Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020JD032529 |
Diurnal Cycle of Precipitation Over the Maritime Continent Under Modulation of MJO: Perspectives From Cloud-Permitting Scale Simulations | |
Wei, Yuntao1; Pu, Zhaoxia1; Zhang, Chidong2 | |
2020-07-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Cloud-permitting scale (3 km) simulations are made to investigate the diurnal cycle of precipitation (DCP) over the Indo-Pacific Maritime Continent under the modulation of the Madden-Julian Oscillation (MJO), focusing on January-February 2018 during the Years of the Maritime Continent (YMC). Comparisons with satellite precipitation and global reanalysis products show that the simulations reasonably capture main features of diurnal wind and precipitation. The MJO modulates the amplitude, timing, and propagation of the DCP through affecting both large-scale and local circulation and convection. Under local suppressed conditions, much strengthened sea/valley breezes are generally responsible for the enhanced and earlier-triggered (2- to 3-hr lead) DCP over land. Meanwhile, stronger cooling induced by enhanced stratiform rainfall excites well-developed gravity waves spreading outward and upward, accompanied by continuous decreases in low-level temperature and amplified land breezes, which cause stronger and further offshore-propagating DCP. The opposite is true under local active conditions. Modulated by the passing of MJO, the enhanced DCP also displays a systematic shift from the west to the east coasts of large islands, forming a unique dipolar structure in the anomalous island DCP. The DCP exhibits island-dependent characteristics: With topographical elevation, the triggering mechanism of island convection transforms from later penetrating sea breeze fronts over mountain foothills to early-excited valley winds over mountain tops. Steep topography also supports stronger intraseasonal variations of the DCP, which can be well explained by regional variations in land-sea/mountain-valley breezes, terrain lifting, and ambient wind-induced advective and vertical wind shear effects. |
英文关键词 | tropical convection diurnal cycle of precipitation cloud-permitting simulation MJO |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000551484700001 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; OUTGOING LONGWAVE RADIATION ; NORTHWESTERN SOUTH-AMERICA ; GRAVITY-WAVES ; INTRASEASONAL VARIABILITY ; RAINFALL VARIABILITY ; CONVECTIVE SYSTEMS ; SURROUNDING OCEANS ; NEW-GUINEA ; SUMATRA |
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/289498 |
专题 | 气候变化 |
作者单位 | 1.Univ Utah, Dept Atmospher Sci, Salt Lake City, UT 84112 USA; 2.NOAA, Pacific Marine Environm Lab, 7600 Sand Point Way Ne, Seattle, WA 98115 USA |
推荐引用方式 GB/T 7714 | Wei, Yuntao,Pu, Zhaoxia,Zhang, Chidong. Diurnal Cycle of Precipitation Over the Maritime Continent Under Modulation of MJO: Perspectives From Cloud-Permitting Scale Simulations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(13). |
APA | Wei, Yuntao,Pu, Zhaoxia,&Zhang, Chidong.(2020).Diurnal Cycle of Precipitation Over the Maritime Continent Under Modulation of MJO: Perspectives From Cloud-Permitting Scale Simulations.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(13). |
MLA | Wei, Yuntao,et al."Diurnal Cycle of Precipitation Over the Maritime Continent Under Modulation of MJO: Perspectives From Cloud-Permitting Scale Simulations".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.13(2020). |
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