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DOI	10.5194/acp-21-8511-2021
	Assessing the contribution of the ENSO and MJO to Australian dust activity based on satellite- and ground-based observations
	Yu, Yan; Ginoux, Paul
通讯作者	Yu, Y (corresponding author), Princeton Univ, Atmospher & Ocean Sci Program, Princeton, NJ 08540 USA.
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
EISSN	1680-7324
出版年	2021
卷号	21 期号:11 页码:8511-8530
英文摘要	Despite Australian dust's critical role in the regional climate and surrounding marine ecosystems, the controlling factors of the spatiotemporal variations of Australian dust are not fully understood. Here we assess the connections between observed spatiotemporal variations of Australian dust with key modes of large-scale climate variability, namely the El Nino-Southern Oscillation (ENSO) and Madden-Julian Oscillation (MJO). Multiple dust observations from the Aerosol Robotic Network (AERONET), weather stations, and satellite instruments, namely the Moderate Resolution Imaging Spectroradiometer (MODIS) and Multi-angle Imaging SpectroRadiometer (MISR), are examined. The assessed multiple dust observations consistently identify the natural and agricultural dust hotspots in Australia, including the Lake Eyre basin, Lake Torrens basin, Lake Frome basin, Simpson Desert, Barwon-Darling basin, Riverina, Barkly Tableland, and the lee side of the Great Dividing Range, as well as a country-wide, austral spring-to-summer peak in dust activity. Our regression analysis of observed dust optical depth (DOD) upon an ocean Nino index confirms previous model-based findings on the enhanced dust activity in southern and eastern Australia during the subsequent austral spring and summer dust season following the strengthening of austral wintertime El Nino. Our analysis further indicates the modulation of the ENSO-dust relationship with the MJO phases. During sequential MJO phases, the dust-active center moves from west to east, associated with the eastward propagation of MJO, with the maximum enhancement in dust activity at about 120, 130, and 140 degrees E, corresponding to MJO phases 1-2, 3-4, and 5-6, respectively. MJO phases 3-6 are favorable for enhanced ENSO modulation of dust activity, especially the occurrence of extreme dust events, in southeastern Australia, currently hypothesized to be attributed to the interaction between MJO-induced anomalies in convection and wind and ENSO-induced anomalies in soil moisture and vegetation.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000661251700002
WOS关键词	MADDEN-JULIAN OSCILLATION ; WIND EROSION ; RAINFALL VARIABILITY ; EASTERN AUSTRALIA ; MODIS ; LAND ; ENHANCEMENT ; DYNAMICS ; ARIDITY ; MODEL
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349627
作者单位	[Yu, Yan] Princeton Univ, Atmospher & Ocean Sci Program, Princeton, NJ 08540 USA; [Ginoux, Paul] NOAA, Geophys Fluid Dynam Lab, Princeton, NJ 08540 USA
推荐引用方式 GB/T 7714	Yu, Yan,Ginoux, Paul. Assessing the contribution of the ENSO and MJO to Australian dust activity based on satellite- and ground-based observations[J],2021,21(11):8511-8530.
APA	Yu, Yan,&Ginoux, Paul.(2021).Assessing the contribution of the ENSO and MJO to Australian dust activity based on satellite- and ground-based observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11),8511-8530.
MLA	Yu, Yan,et al."Assessing the contribution of the ENSO and MJO to Australian dust activity based on satellite- and ground-based observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021):8511-8530.