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DOI | 10.1029/2018JD029795 |
Tropical Synoptic-Scale Waves Propagating Across the Maritime Continent and Northern Australia | |
Fukutomi, Yoshiki | |
2019-07-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:14页码:7665-7682 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | The structure and characteristics of tropical synoptic-scale wave disturbances over the Maritime Continent (MC) and northern Australia during the Southern Hemisphere summer are analyzed. The tropical synoptic-scale waves are identified by an extended empirical orthogonal function analysis on 2- to 8-day-filtered daily 850-hPa meridional wind anomalies during December-February for the period 1979-2016. Extended empirical orthogonal function-based composite analyses of various fields reveal a synoptic-scale wave train, with a well-organized structure, which is coupled with deep convection anomalies. The composite waves are considered to be tropical depression-type waves that develop along a strong meridional gradient of the mean monsoon westerly flow. These waves propagate westward at approximately 8m/s, with zonal wavelengths of about 3,000-4,000 km. Eastward amplification of wave troughs and ridges due to group propagation occurs within the synoptic-scale wave train. Wave activity diagnostics confirm that downstream wave energy propagation facilitates the development of the synoptic-scale wave train along the monsoon westerly flow. Rainfall is enhanced over the MC and the ocean in the vicinity of the north coast of Australia, which is associated with the passage of the wave trough. The development of this synoptic-scale wave is found to play an important role in day-to-day weather variation over the MC. Extratropical forcing of the tropical synoptic-scale waves is also explored. Southerly surges that originated in the midlatitude Indian Ocean could intensify the tropical synoptic-scale wave trough. The southerly surges are induced by the development of midlatitude synoptic-scale baroclinic disturbances over the eastern Indian Ocean. |
英文关键词 | Asian-Australian monsoon Maritime Continent equatorial waves tropical-extratropical interaction tropical synoptic-scale waves winter monsoon |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481444200013 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; NEAR-EQUATORIAL DISTURBANCES ; OUTGOING LONGWAVE RADIATION ; NORTHEASTERLY COLD SURGES ; BOUNDARY-LAYER RADAR ; WINTER MONEX AREA ; SOUTH-CHINA SEA ; DIURNAL CYCLE ; INDIAN-OCEAN ; DOWNSTREAM DEVELOPMENT |
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/185227 |
专题 | 气候变化 |
作者单位 | Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan |
推荐引用方式 GB/T 7714 | Fukutomi, Yoshiki. Tropical Synoptic-Scale Waves Propagating Across the Maritime Continent and Northern Australia[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(14):7665-7682. |
APA | Fukutomi, Yoshiki.(2019).Tropical Synoptic-Scale Waves Propagating Across the Maritime Continent and Northern Australia.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(14),7665-7682. |
MLA | Fukutomi, Yoshiki."Tropical Synoptic-Scale Waves Propagating Across the Maritime Continent and Northern Australia".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.14(2019):7665-7682. |
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