Publication Date:
2016-01-20
Description:
Flow regulation and irrigation alter local freshwater conditions, but their global effects are highly uncertain. We investigated these global effects from 1901 to 2008, using hydroclimatic observations in 100 large hydrological basins. Globally, we find consistent and dominant effects of increasing relative evapotranspiration from both activities, and decreasing temporal runoff variability from flow regulation. The evapotranspiration effect increases the long-term average human consumption of fresh water by 3563 +/- 979 km(3)/year from 1901-1954 to 1955-2008. This increase raises a recent estimate of the current global water footprint of humanity by around 18%, to 10,688 +/- 979 km(3)/year. The results highlight the global impact of local water-use activities and call for their relevant account in Earth system modeling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jaramillo, Fernando -- Destouni, Georgia -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1248-51. doi: 10.1126/science.aad1010.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physical Geography and Bolin Centre for Climate Research, Stockholm University, SE-106 91, Stockholm, Sweden. Department of Biological and Environmental Sciences, University of Gothenburg, 40530 Goteborg, Sweden. fernando.jaramillo@natgeo.su.se. ; Department of Physical Geography and Bolin Centre for Climate Research, Stockholm University, SE-106 91, Stockholm, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26785489" target="_blank"〉PubMed〈/a〉
Keywords:
*Agricultural Irrigation
;
Climate Change
;
*Drinking
;
*Fresh Water
;
Humans
;
Plant Transpiration
;
Water Supply/*standards
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
