Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017JD026979 |
Atmospheric Mechanisms for MJO Decay Over the Maritime Continent | |
DeMott, Charlotte A.; Wolding, Brandon O.; Maloney, Eric D.; Randall, David A. | |
2018-05-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:10页码:5188-5204 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Eastward propagating Madden-Julian oscillation (MJO) events that develop in the Indian Ocean from November to April are separated into events whose convective anomalies do and do not propagate across the Maritime Continent (MC). Propagating (P) events are divided into strong (sP) and weak (wP) subsets based on the initial amplitudes of their convective anomalies. Eastward decaying (ED) MJO events have initial amplitudes similar to those of wP events. Roughly half of all MJO events encounter westward propagating transient dry precursor (TDP) signals over the MC. These TDPs, which are external to the MJO circulation system, overwhelm the weak, eastward propagating moist anomaly in ED events, leading to MJO termination. In wP events, the MJO moist anomaly is stronger than the TDP dry anomaly, and the MJO propagates beyond the MC. ED MJO events that do not encounter TDPs decay because of insufficient moistening in the southern MC region. The background states of TDP- and non-TDP-affected MJO events resemble LaNina and ElNino conditions, respectively. The regional regulation of TDP activity and background moisture gradients by ElNino-Southern Oscillation can both be understood in terms of the zonal shift and the meridional expansion or contraction of Warm Pool moisture in response to ElNino-Southern Oscillation sea surface temperature anomalies. Our results demonstrate that modulation of TDPs by the background state moisture can affect the MJO in a manner that reinforces its propagation or decay via the interaction of MJO circulation anomalies and background moisture gradients. |
英文关键词 | MJO propagation tropical convection moisture feedbacks transient disturbances ENSO |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435445600025 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; TROPICAL INTRASEASONAL OSCILLATION ; SEA-SURFACE TEMPERATURE ; STATIC ENERGY BUDGET ; EASTWARD PROPAGATION ; VERTICAL STRUCTURE ; PACIFIC ; CLIMATE ; TRACKING ; EVENTS |
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/32396 |
专题 | 气候变化 |
作者单位 | Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA |
推荐引用方式 GB/T 7714 | DeMott, Charlotte A.,Wolding, Brandon O.,Maloney, Eric D.,et al. Atmospheric Mechanisms for MJO Decay Over the Maritime Continent[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(10):5188-5204. |
APA | DeMott, Charlotte A.,Wolding, Brandon O.,Maloney, Eric D.,&Randall, David A..(2018).Atmospheric Mechanisms for MJO Decay Over the Maritime Continent.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(10),5188-5204. |
MLA | DeMott, Charlotte A.,et al."Atmospheric Mechanisms for MJO Decay Over the Maritime Continent".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.10(2018):5188-5204. |
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