干旱区生态环境知识资源中心(Arid): Impacts of extreme climate on Australia's green cover (2003-2018): A MODIS and mascon probe

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DOI	10.1016/j.scitotenv.2020.142567
	Impacts of extreme climate on Australia's green cover (2003-2018): A MODIS and mascon probe
	Saleem, A.; Awange, J. L.; Kuhn, M.; John, B.; Hu, K.
通讯作者	Saleem, A (corresponding author), Curtin Univ, Spatial Sci Discipline, Sch Earth & Planetary Sci, Perth, WA, Australia.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	766
英文摘要	Australia as a continent represents a semi-arid environment that is generally water-limited. Changes in rainfall pattern will inevitably occur due to rising temperatures caused by climate change, which has a direct impact on the distribution of Australia's vegetation (green cover). As variability in rainfall continues to increase, i.e., in frequency and/or magnitude, due to climate change, extreme climate events such as droughts are predicted to become more pervasive and severe that will have an adverse effect on vegetation. This study investigates the effects of extreme climate on Australia's green cover during 2003-2018 for the end of rainy seasons of April and October in the northern and southern parts, respectively, to (i) determine the state of vegetation and its changes, (ii) identify hotspots, i.e., regions that constantly experienced statistically significant decrease in NDVI, and (iii), relate changes in the identified hotspots to GRACE-hydrological changes. These are achieved through the exploitation of the statistical tools of Principal Component Analysis (PCA) and Mann-Kendel Test on Gravity Recovery and Climate Experiment (GRACE) hydrological products on the one hand, and the utilization of Australia's rainfall product and Moderate Resolution Imaging Spectroradiometer Normalized Difference Vegetation Index (MODIS-NDVI) used here with its native spatial resolution of 0.002413 degrees x 0.002413 degrees on the other hand. Differences between 3-year intervals from 2003 to 2018 for both April and October datasets are used to quantify vegetation variations. Through area change analysis, the vegetation differences (2003-2018) indicate that April exhibited larger increase (13.77% of total vegetation area) than decrease (7.83%) compared to October, which experienced slightly larger decrease (9.41%) than increase (8.71%). South Australia and Western Australia emerge as hotspots in which vegetation statistically decreased in October, with no noticeable change in April. GRACE-based hydrological changes in both hotspots reflect a decreasing trend (2003-2009) and increasing trend (2009-2012) that peaks in 2011, which then transitions towards a gradually decreasing trend after 2012. Australia-wide climate variability (ENSO and IOD) influenced vegetation variations during the data period 2003 to 2018. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Extreme climate Vegetation change NDVI Australia Climate variability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000617676800018
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368847
作者单位	[Saleem, A.; Awange, J. L.; Kuhn, M.; John, B.; Hu, K.] Curtin Univ, Spatial Sci Discipline, Sch Earth & Planetary Sci, Perth, WA, Australia; [Awange, J. L.] Karlsruhe Inst Technol, Geodet Inst, Engler Str 7, D-76131 Karlsruhe, Germany
推荐引用方式 GB/T 7714	Saleem, A.,Awange, J. L.,Kuhn, M.,et al. Impacts of extreme climate on Australia's green cover (2003-2018): A MODIS and mascon probe[J],2021,766.
APA	Saleem, A.,Awange, J. L.,Kuhn, M.,John, B.,&Hu, K..(2021).Impacts of extreme climate on Australia's green cover (2003-2018): A MODIS and mascon probe.SCIENCE OF THE TOTAL ENVIRONMENT,766.
MLA	Saleem, A.,et al."Impacts of extreme climate on Australia's green cover (2003-2018): A MODIS and mascon probe".SCIENCE OF THE TOTAL ENVIRONMENT 766(2021).