气候变化领域集成服务门户(CCPortal): Catchment-scale drought: Capturing the whole drought cycle using multiple indicators

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DOI	10.5194/hess-24-1985-2020
	Catchment-scale drought: Capturing the whole drought cycle using multiple indicators
	Gibson A.J.; Verdon-Kidd D.C.; Hancock G.R.; Willgoose G.
发表日期	2020
ISSN	1027-5606
起始页码	1985
结束页码	2002
卷号	24 期号:4
英文摘要	Global agricultural drought policy has shifted towards promoting drought preparedness and climate resilience in favor of disaster-relief-based strategies. For this approach to be successful, drought predictability and methods for assessing the many aspects of drought need to be improved. Therefore, this study aims to bring together meteorological and hydrological measures of drought as well as vegetation and soil moisture data to assess how droughts begin, propagate and subsequently terminate for a catchment in eastern Australia. For the study area, 13 meteorological drought periods persisting more than 6 months were identified over the last 100 years. During these periods, vegetation health, soil moisture and streamflow declined; however, all of the indicators recovered quickly post-drought, with no evidence of extended impacts on the rainfall-runoff response, as has been observed elsewhere. Furthermore, drought initiation and propagation were found to be tightly coupled to the combined state of large-scale ocean-atmosphere climate drivers (e.g., the El Niño-Southern Oscillation, the Indian Ocean Dipole and the Southern Annular Mode), whereas termination was caused by persistent synoptic systems (e.g., low-pressure troughs). The combination of climatic factors, topography, soils and vegetation are believed to be what makes the study catchments more resilient to drought than others in eastern Australia. This study diversifies traditional approaches to studying droughts by quantifying the catchment response to drought using a range of measures that could also be applied in other catchments globally. This is a key step towards improved drought management. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	Agricultural robots; Atmospheric pressure; Catchments; Disaster prevention; Runoff; Soil moisture; Topography; Vegetation; Agricultural drought; Indian Ocean dipole; Initiation and propagation; Meteorological drought; Rainfall-runoff response; Southern Annular Mode; Southern oscillation; Traditional approaches; Drought; catchment; disaster management; drought; environmental factor; Indian Ocean Dipole; rainfall-runoff modeling; soil moisture; streamflow; Australia
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159431
作者单位	Gibson, A.J., School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Verdon-Kidd, D.C., School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Hancock, G.R., School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Willgoose, G., School of Engineering, University of Newcastle, Callaghan, NSW 2308, Australia
推荐引用方式 GB/T 7714	Gibson A.J.,Verdon-Kidd D.C.,Hancock G.R.,et al. Catchment-scale drought: Capturing the whole drought cycle using multiple indicators[J],2020,24(4).
APA	Gibson A.J.,Verdon-Kidd D.C.,Hancock G.R.,&Willgoose G..(2020).Catchment-scale drought: Capturing the whole drought cycle using multiple indicators.Hydrology and Earth System Sciences,24(4).
MLA	Gibson A.J.,et al."Catchment-scale drought: Capturing the whole drought cycle using multiple indicators".Hydrology and Earth System Sciences 24.4(2020).