气候变化领域集成服务门户(CCPortal): River basin salinization as a form of aridity

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DOI	10.1073/pnas.2005925117
	River basin salinization as a form of aridity
	Perri S.; Suweis S.; Holmes A.; Marpu P.R.; Entekhabi D.; Molini A.
发表日期	2020
ISSN	0027-8424
起始页码	17635
结束页码	17642
卷号	117 期号:30
英文摘要	Soil-salinization affects, to a different extent, more than one-third of terrestrial river basins (estimate based on the Food and Agriculture Organization Harmonized World Soil Database, 2012). Among these, many are endorheic and ephemeral systems already encompassing different degrees of aridity, land degradation, and vulnerability to climate change. The primary effect of salinization is to limit plant water uptake and evapotranspiration, thereby reducing available soil moisture and impairing soil fertility. In this, salinization resembles aridity and—similarly to aridity—may impose significant controls on hydrological partitioning and the strength of land–vegetation–atmosphere interactions at the catchment scale. However, the long-term impacts of salinization on the terrestrial water balance are still largely unquantified. Here, we introduce a modified Budyko’s framework explicitly accounting for catchment-scale salinization and species-specific plant salt tolerance. The proposed framework is used to interpret the water-budget data of 237 Australian catchments—29% of which are already severely salt-affected—from the Australian Water Availability Project (AWAP). Our results provide theoretical and experimental evidence that salinization does influence the hydrological partitioning of salt-affected watersheds, imposing significant constraints on water availability and enhancing aridity. The same approach can be applied to estimate salinization level and vegetation salt tolerance at the basin scale, which would be difficult to assess through classical observational techniques. We also demonstrate that plant salt tolerance has a preeminent role in regulating the feedback of vegetation on the soil water budget of salt-affected basins. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Aridity; Hydrological partitioning; Plant salt tolerance; Saline river basins; Soil salinization
语种	英语
scopus关键词	sodium chloride; soil water; aridity; Article; Australia; catchment area (hydrology); climate change; concentration (parameter); controlled study; electric conductivity; environmental aspects and related phenomena; environmental parameters; evapotranspiration; phase partitioning; precipitation; priority journal; river basin; salinity; salinization; salt stress; salt tolerance; soil property; soil water balance; vegetation; water availability; watershed
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160867
作者单位	Perri, S., Masdar Institute, Khalifa University of Science and Technology, PO Box 54224, Abu Dhabi, United Arab Emirates, Department of Civil Infrastructure and Environmental Engineering, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates; Suweis, S., Dipartimento di Fisica e Astronomia “G. Galilei,”, University of Padova, Istituto Nazionale di Fisica Nucleare, Padova, 35131, Italy; Holmes, A., Planning and Predictive Services, New South Wales Rural Fire Service, Sydney Olympic Park, NSW 2127, Australia; Marpu, P.R., Masdar Institute, Khalifa University of Science and Technology, PO Box 54224, Abu Dhabi, United Arab Emirates, Department of Electrical Engineering and Computer Science, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates; Entekhabi, D., Ralph M. Parsons Laboratory for Environmental Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Molini, A., Masdar Institute...
推荐引用方式 GB/T 7714	Perri S.,Suweis S.,Holmes A.,et al. River basin salinization as a form of aridity[J],2020,117(30).
APA	Perri S.,Suweis S.,Holmes A.,Marpu P.R.,Entekhabi D.,&Molini A..(2020).River basin salinization as a form of aridity.Proceedings of the National Academy of Sciences of the United States of America,117(30).
MLA	Perri S.,et al."River basin salinization as a form of aridity".Proceedings of the National Academy of Sciences of the United States of America 117.30(2020).