A use of global climate model output for site-specific assessment of climate change impacts on groundwater temperature

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Spatial mismatch of coarse resolution projections in Global Climate Models (GCMs) is a major constraint in site-specific climate impact predictions. The objectives of this study were to: (1) statistically downscale MRI monthly data at coarse resolution grid scale to station scale in the Sendai plain, Japan using transfer function method, and (2) estimate the potential range of groundwater temperature change in future from different GCM scenarios. Field observations of groundwater temperature and groundwater level were made in five observation wells. A water budget technique was applied to account for the changes of groundwater recharge in the future. A one-dimensional heat transport model was calibrated to the present day and used with the downscaled GCM results and potential recharge variations for predicting aquifer temperature change. The strongest effects were estimated that probably increase surface air temperature by 3.3°C and annual precipitation by 82 mm (7% from 1967 to 2006) during 2060-2099. The overall results show that the aquifer temperature, under the changed ground surface temperature and precipitation, will increase in a range of 1.1 to 2.6°C.

Original languageEnglish
Title of host publicationIAHS-AISH Publication
Pages264-276
Number of pages13
Edition329
Publication statusPublished - 2009
EventSymposium HS.2 at the Joint Convention of the International Association of Hydrological Sciences, IAHS and the International Association of Hydrogeologists, IAH - Hyderabad, India
Duration: Sep 6 2009Sep 12 2009

Other

OtherSymposium HS.2 at the Joint Convention of the International Association of Hydrological Sciences, IAHS and the International Association of Hydrogeologists, IAH
CountryIndia
CityHyderabad
Period9/6/099/12/09

Keywords

  • Climate change
  • Downscaling
  • Groundwater temperature
  • Sendai plain
  • Transfer function

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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