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Journal Article

Impact of climate change on water resources status: A case study for Crete Island, Greece


Jacob,  Daniela
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
Climate Service Center;

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Koutroulis, A., Tsanis, I., Daliakopoulos, I., & Jacob, D. (2013). Impact of climate change on water resources status: A case study for Crete Island, Greece. Journal of Hydrology, 479, 146 -158. doi:10.1016/j.jhydrol.2012.11.055.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-7002-0
An assessment of the impact of global climate change on the water resources status of the island of Crete, for a range of 24 different scenarios of projected hydro-climatological regime is presented. Three "state of the art" Global Climate Models (GCMs) and an ensemble of Regional Climate Models (RCMs) under emission scenarios B1, A2 and A1B provide future precipitation (P) and temperature (T) estimates that are bias adjusted against observations. The ensemble of RCMs for the A1B scenario project a higher P reduction compared to GCMs projections under A2 and B1 scenarios. Among GCMs model results, the ECHAM model projects a higher P reduction compared to IPSL and CNCM. Water availability for the whole island at basin scale until 2100 is estimated using the SAC-SMA rainfall-runoff model And a set of demand and infrastructure scenarios are adopted to simulate potential water use. While predicted reduction of water availability under the B1 emission scenario can be handled with water demand stabilized at present values and full implementation of planned infrastructure, other scenarios require additional measures and a robust signal of water insufficiency is projected. Despite inherent uncertainties, the quantitative impact of the projected changes on water availability indicates that climate change plays an important role to water use and management in controlling future water status in a Mediterranean island like Crete. The results of the study reinforce the necessity to improve and update local water management planning and adaptation strategies in order to attain future water security. © 2012 Elsevier B.V. All rights reserved.