干旱区生态环境知识资源中心(Arid): The Timing of Global Floods and Its Association With Climate and Topography

Arid

DOI	10.1029/2022WR032968
	The Timing of Global Floods and Its Association With Climate and Topography
	Zaffaroni, Paula Torre; Baldi, German; Texeira, Marcos; Di Bella, Carlos M.; Jobbagy, Esteban G.
通讯作者	Zaffaroni, PT
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2023
卷号	59 期号:7
英文摘要	Until recently, the development of a global geography of floods was challenged by the fragmentation and heterogeneity of in situ data and the high costs of processing large amounts of remote sensing data. Such geography would facilitate the exploration of large-scale drivers of flood extent and timing including wide latitudinal, climate, and topographic effects. Here we used a monthly data set spanning 30 years (Global Surface Water) to develop a worldwide geographical characterization of slow floods (1-degree grid), weighting the relative contribution of seasonal, interannual, and long-term fluctuations on overall variability, and quantified precipitation-flooding delays where seasonality dominated. We explored the dominance of different flooding timings across five main Koppen-Geiger climates and seven topography classes derived from modeled water table depths (i.e., hydro-topography) to contribute top-down insight about the most salient, cross-regional flooding patterns and their likely large-scale drivers. Our results showed that, globally, the mean extent of floods averaged 0.48% of the global land area, predominantly associated with hydro-topography (>2x more extensive in flatter landscapes). Climate drove flood timings, with predictable, seasonally dominated fluctuations in cold regions, interannual, and mixed patterns in temperate climates, and more irregular (higher variability) and unpredictable (less seasonal) patterns in arid regions. Net gains of flooded area dominated temporal variability in 9% of the cells including boreal clusters likely affected by warming trends. We propose that this new geographical perspective of floods can aid different avenues of hydrological research in the upscaling and extrapolation of field studies and the parsimonious representation of floods in hydroclimatic models.
英文关键词	flooding variability time series global remote sensing
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001028916300001
WOS关键词	SURFACE-WATER ; SONGNEN PLAIN ; HYDROLOGIC CONTROLS ; TIBETAN PLATEAU ; PATTERNS ; LAND ; SEASONALITY ; DRIVERS ; REGIMES ; IMPACTS
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/399154
推荐引用方式 GB/T 7714	Zaffaroni, Paula Torre,Baldi, German,Texeira, Marcos,et al. The Timing of Global Floods and Its Association With Climate and Topography[J],2023,59(7).
APA	Zaffaroni, Paula Torre,Baldi, German,Texeira, Marcos,Di Bella, Carlos M.,&Jobbagy, Esteban G..(2023).The Timing of Global Floods and Its Association With Climate and Topography.WATER RESOURCES RESEARCH,59(7).
MLA	Zaffaroni, Paula Torre,et al."The Timing of Global Floods and Its Association With Climate and Topography".WATER RESOURCES RESEARCH 59.7(2023).