干旱区生态环境知识资源中心(Arid): Drought Impacts on Australian Vegetation During the Millennium Drought Measured With Multisource Spaceborne Remote Sensing

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DOI	10.1029/2019JG005145
	Drought Impacts on Australian Vegetation During the Millennium Drought Measured With Multisource Spaceborne Remote Sensing
	Jiao, Tong; Williams, Christopher A.; Rogan, John; De Kauwe, Martin G.; Medlyn, Belinda E.
通讯作者	Jiao, T
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2020
卷号	125 期号:2
英文摘要	During the period from 1997 to 2009, Australia experienced a severe and persistent drought known as the millennium drought (MD). Major water shortages were reported across the continent, and there were some field accounts of tree mortality and dieback, but large-area assessment has been lacking. Given uncertain projections of future drought conditions in South-East Australia, analysis of the MD presents a valuable opportunity to assess possible impacts of these future trends. In this study, we analyzed the magnitude and sensitivity of vegetation responses to the MD with satellite-derived information including the fraction of photosynthetically absorbed radiation, photosynthetic vegetation cover, canopy density derived from vegetation optical depth, and aboveground biomass carbon. Results show that the most severe impacts were concentrated in southeastern Australia where all four biophysical variables exhibited the highest absolute declines. Cultivated lands, followed by grasslands, experienced the largest drought impact and also demonstrated the highest sensitivity to drought compared to natural biomes. Shrublands showed the greatest resistance to drought-induced declines. Forests exhibited the lowest sensitivity in canopy properties but average drought sensitivity for biomass, similar to other natural biomes. More arid settings tended to have higher drought sensitivity for canopy properties but lower sensitivity to biomass loss. Drought-induced carbon releases were largest in forested ecosystems and in more humid climatic settings. High sensitivity of forest biomass to drought suggests that a large amount of carbon could be vulnerable to release to the atmosphere. Key Points Cultivated lands and grasslands experienced the most severe impacts of the millennium drought and showed the highest drought sensitivityDrought sensitivity of natural vegetation tended to increase from humid to arid settings, whereas biomass saw decreased sensitivity High drought sensitivity of aboveground biomass carbon in forest ecosystems indicates a sizable risk of carbon release with future droughts
英文关键词	Drought extremes Australia remote sensing time series carbon cycle ecosystems
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000534472900004
WOS关键词	LEAF-AREA INDEX ; PHOTOSYNTHETICALLY ACTIVE RADIATION ; TREE MORTALITY ; CLIMATE-CHANGE ; CANOPY STRUCTURE ; ROOTING DEPTH ; FOREST ; REFLECTANCE ; HEAT ; PRODUCTIVITY
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324511
作者单位	[Jiao, Tong; Williams, Christopher A.; Rogan, John] Clark Univ, Grad Sch Geog, Worcester, MA 01610 USA; [De Kauwe, Martin G.] Univ New South Wales, ARC Ctr Excellence Climate Extremes, Sydney, NSW, Australia; [Medlyn, Belinda E.] Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia
推荐引用方式 GB/T 7714	Jiao, Tong,Williams, Christopher A.,Rogan, John,et al. Drought Impacts on Australian Vegetation During the Millennium Drought Measured With Multisource Spaceborne Remote Sensing[J],2020,125(2).
APA	Jiao, Tong,Williams, Christopher A.,Rogan, John,De Kauwe, Martin G.,&Medlyn, Belinda E..(2020).Drought Impacts on Australian Vegetation During the Millennium Drought Measured With Multisource Spaceborne Remote Sensing.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(2).
MLA	Jiao, Tong,et al."Drought Impacts on Australian Vegetation During the Millennium Drought Measured With Multisource Spaceborne Remote Sensing".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.2(2020).