气候变化领域集成服务门户(CCPortal): Observed land surface feedbacks on the Australian monsoon system

CCPortal

DOI	10.1007/s00382-020-05154-0
	Observed land surface feedbacks on the Australian monsoon system
	Yu Y.; Notaro M.
发表日期	2020
ISSN	0930-7575
起始页码	3021
结束页码	3040
卷号	54
英文摘要	The current study investigates the observed land surface feedbacks on the Australian monsoon system by applying a multivariate statistical method, Stepwise Generalized Equilibrium Feedback Assessment (SGEFA), to a spectrum of observational, remote sensing, and reanalysis datasets. In particular, the influence of Madden Julian Oscillation (MJO) on the Australian monsoon system is accounted for in the assessment of land surface feedbacks. The approach reveals the quantitative impacts and relative contribution of key individual oceanic, vegetation, and soil moisture forcings, along with the MJO, on the Australian monsoon’s observed sub-seasonal to interannual variability. During both the flanks and core of the Australian summer monsoon season, terrestrial and oceanic drivers impose comparable contributions, both exceeding MJO’s contribution, to the regional climate variability. Vegetation and soil moisture generally exert opposing feedbacks on the monsoon system, thereby weakening the net impact of terrestrial drivers. Vegetation feedbacks peak in the mid- to post-monsoon period, with positive anomalies in leaf area index generating a modified atmospheric circulation pattern that reduces moisture advection and rainfall across northern Australia. Soil moisture feedbacks are most pronounced during the pre- and post-monsoon seasons, with positive soil moisture anomalies favoring more rainfall through enhanced moisture recycling and modified atmospheric circulation. The current observational evidence of a negative vegetation-rainfall feedback across northern Australia and its underlying dynamical feedback mechanism deviates from most previous modeling studies that concluded a positive vegetation-rainfall feedback via a moisture recycling mechanism. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	climate variation; land surface; leaf area index; Madden-Julian oscillation; monsoon; multivariate analysis; rainfall; remote sensing; soil moisture; vegetation; Australia
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145552
作者单位	Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ, United States; Nelson Institute Center for Climatic Research, University of Wisconsin, Madison, WI, United States
推荐引用方式 GB/T 7714	Yu Y.,Notaro M.. Observed land surface feedbacks on the Australian monsoon system[J],2020,54.
APA	Yu Y.,&Notaro M..(2020).Observed land surface feedbacks on the Australian monsoon system.Climate Dynamics,54.
MLA	Yu Y.,et al."Observed land surface feedbacks on the Australian monsoon system".Climate Dynamics 54(2020).