气候变化领域集成服务门户(CCPortal): Characterizing the seasonal cycle of the northern australian rainy season

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DOI	10.1175/JCLI-D-19-0592.1
	Characterizing the seasonal cycle of the northern australian rainy season
	Uehling J.; Misra V.
发表日期	2020
ISSN	0894-8755
起始页码	8957
结束页码	8973
卷号	33 期号:20
英文摘要	In this paper we introduce an objective definition for the onset and the retreat of the northern Australian rainy season that overlaps significantly with the Australian monsoon season. We define onset and retreat dates of the northern Australian rainy season as being the first and the last day of the year when the daily rain rate exceeds and falls below the climatological annual mean rain rate, respectively. However, our definition of onset/demise is not as restrictive as the traditional monsoon season that seeks the arrival of the westerlies and the equatorward retreat of the trough at its onset and demise, respectively. As defined in this paper, the length of the rainy season is longer than the monsoon season and includes the pre- and post-monsoon rainfall. It is noted that an early or later onset date of the northern Australian rainy season is associated with a longer or shorter, wetter or drier, and colder or warmer season, respectively. Similar relationship is also observed with demise date variations, which are, however, weaker than the onset date variations. Furthermore, we find that the relationship of the northern Australian seasonal rainfall variations with ENSO variability becomes stronger when we account for variations in the length of the rainy season compared to the fixed (December-February) monsoon season length. We also find a significant linear trend over the time period of the analysis from 1901 to 2015 toward an increasing length of the northern Australian rainy season that influences the corresponding rising trend of seasonal rainfall anomalies. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Rain; Linear trends; Monsoon season; Objective definition; Post-monsoon; Rainy seasons; Seasonal cycle; Seasonal rainfall; Time-periods; Atmospheric thermodynamics; annual variation; climate change; climate variation; El Nino-Southern Oscillation; monsoon; precipitation assessment; precipitation intensity; seasonal variation; Australia
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171526
作者单位	Department of Earth, Ocean and Atmospheric Science, Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, FL, United States; Department of Earth, Ocean and Atmospheric Science, Center for Ocean-Atmospheric Prediction Studies, Florida Climate Institute, Florida State University, Tallahassee, FL, United States
推荐引用方式 GB/T 7714	Uehling J.,Misra V.. Characterizing the seasonal cycle of the northern australian rainy season[J],2020,33(20).
APA	Uehling J.,&Misra V..(2020).Characterizing the seasonal cycle of the northern australian rainy season.Journal of Climate,33(20).
MLA	Uehling J.,et al."Characterizing the seasonal cycle of the northern australian rainy season".Journal of Climate 33.20(2020).