JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-ZZ Others

[M-ZZ40] [EE] Sustainable global groundwater management for human security

Mon. May 22, 2017 10:45 AM - 12:15 PM A07 (Tokyo Bay Makuhari Hall)

convener:Yoshihide Wada(Utrecht University), Makoto Taniguchi(Research Institute for Humanity and Nature), Naota Hanasaki(NIES National Institute of Environmental Studies), Yadu N Pokhrel(Michigan State University), Chairperson:Yoshihide Wada(Utrecht University)

11:15 AM - 11:30 AM

[MZZ40-03] The contrasting impacts of climate change on groundwater hydrology in the world’s major aquifers

★Invited papers

*Min-Hui Lo1, Wen-Ying Wu2, Yoshihide Wada3, James Famiglietti4, John Reager4, Pat Yeh5, Agnès Ducharne6, Ren-Jie Wu1 (1.National Taiwan University, 2.UT-Austin, 3.IIASA , 4.JPL, 5.National University of Singapore (NUS), 6.Directrice de recherche CNRS, UMR METIS (anciennement Sisyphe))

Keywords:CESM-LE, groundwater

Groundwater is the source for approximately 40% of all global freshwater demand, and is thus critical for water supplies and associated food production in arid and semi-arid regions, especially during dry seasons. The increasing demand for water and food (due to population growth) and variability in water resources (due to climate change) have led to long-term groundwater depletion, compromising the sustainability of human water use in several regions of the world. Here, we utilized fully coupled climate model simulations from the Community Earth System Model Large Ensemble Project to investigate groundwater storage changes in the world’s major aquifers (Guarani, Southern Plains, Northwestern India, Middle East, Canning, North China Plain, and Central Valley) under future climate changes. The projections show that climate change contributes to changes in groundwater storage not only via changes in precipitation, but also through changes in plant transpiration under CO2 fertilization effects, reductions in snowmelt, and enhancement of surface evaporation, which collectively lead to contrasting effects between increased precipitation and increased evapotranspiration.