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Impacts And Adaptation: Impacts on Hydrology

Item #d98may52

"Heavy Precipitation Processes in a Warmer Climate," C. Frei (Atmospheric Sci., ETH, CH-8093, Zürich, Switz; e-mail:, C. Schär et al.,Geophys. Res. Lett., 25(9), 1431-1434, May 1, 1998.

Experiments with a regional climate model carried out for Europe in the fall season indicate a substantial shift towards more frequent events of strong precipitation.

Item #d98may53

"Climate Change and Water Resources in Britain," N.W. Arnell (Dept. Geog., Univ. Southampton, Highfield, Southampton SO17 1BJ, UK),Clim. Change, 39(1), 83-110, May 1998.

Based on a review of simulations of changes in river flows, groundwater recharge and river water quality, this paper explores implications for water use and management. Increased pressures on water resources, expected to result from climate change, will impact not only the reliability of water supply, but also navigation, aquatic ecosystems, recreation and power generation.

Item #d98may54

"Evaporation and Potential Evapotranspiration in India Under Conditions of Recent and Future Climate Change," N. Chattopadhyay, M. Hulme (Clim. Res. Unit., Sch. Environ. Sci., Univ. E. Anglia, Norwich NR4 7TJ, UK),Agric. & Forest Meteor., 87(1), 55-73, Nov. 1997.

Analysis of data from various stations across India shows that both pan evaporation and potential evapotranspiration have decreased during recent years. Future warming projected by GCMs seems likely to lead to increased potential evapotranspiration, with marked economic and environmental implications.

Item #d98may55

"Climate Change Impacts on the Hydrologic Resources of Europe: A Simplified Continental Scale Analysis," K.M. Strzepek (Civil, Environ. & Architectural Eng., Univ. Colorado, Boulder CO 80309), D.N. Yates,Clim. Change, 36(1-2), 79-92, May-June 1997.

Develops a simplified regional analysis based on GIS and annual climate databases, and compares results to more complex analyses at the river basin scale that use monthly water balance models. The simplified method gives acceptable results, and is applied to Europe on the national and regional levels.

Item #d98may56

"Changes in Daily Precipitation Under Enhanced Greenhouse Conditions," K.J. Hennessy (e-mail:, J.M. Gregory (Hadley Ctr., Meteor. Off., London Rd., Bracknell, Berkshire RG12 2SY, UK), J.F.B. Mitchell,Clim. Dynamics, 13(9), 667-680, 1997.

Examines the nature of global precipitation increases of about 10% predicted by UK and Australian GCMs under doubled CO2. Both models simulate fewer wet days in middle latitudes and more wet days in high latitudes. The probability of heavy daily precipitation increases by over 50% in many locations.

Item #d98may57

"Impacts of Global Climate Change in a Hydrologically Vulnerable Region: Challenges to South African Hydrologists," R.E. Schulze (Dept. Agric. Eng., Univ. Natal, Pietermaritzburg, P.B. X01, 3209 Scottsville, S. Africa),Progress in Phys. Geog., 21(1), 113-136, Mar. 1997.

Reviews projected perturbations to temperature, precipitation and potential evaporation, and methods for simulating hydrological response to climate change. Summarizes directions for research and presents two case studies. Concludes by discussing whether water resources practitioners in South Africa should respond to climate change.

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