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Articles 1 - 3 of 3
Full-Text Articles in Engineering
Impact Of Climate Change On Irrigation Water Availability, Crop Water Requirements And Soil Salinity In The Sjv, Ca, Jan Hopmans, Edwin P. Maurer
Impact Of Climate Change On Irrigation Water Availability, Crop Water Requirements And Soil Salinity In The Sjv, Ca, Jan Hopmans, Edwin P. Maurer
Civil, Environmental and Sustainable Engineering
We examine potential regional-scale impacts of global climate change on sustainability of irrigated agriculture, focusing on the western San Joaquin Valley in California. We consider potential changes in irrigation water demand and supply, and quantify impacts on cropping patterns, groundwater pumping, groundwater levels, soil salinity, and crop yields. Our analysis is based on archived output from General Circulation Model (GCM) climate projections through 2100, which are downscaled here to the scale of the study area (~30 km across). We account for uncertainty in GCM climate projections by considering output from two different GCM's, each using three greenhouse gas emission scenarios. …
Sustainable Portland: Implementation Series 1, New England Environmental Finance Center
Sustainable Portland: Implementation Series 1, New England Environmental Finance Center
Climate Change
When the Sustainable Portland Task Force Report was released in November 2007, under the leadership of Mayor Jim Cohen, Portland Councilor Kevin Donoghue had the idea that students at the Muskie School of Public Service might be able to help implement recommendations from the report. It may have helped that Kevin was himself a graduate of the Community Planning and Development Master’s program at the Muskie School, but it was a good idea nevertheless. He approached Professor Sam Merrill in the CPD program, who spoke with the new Mayor Ed Suslovic about a possible partnership between the City and the …
Utility Of Daily Vs. Monthly Large-Scale Climate Data: An Intercomparison Of Two Statistical Downscaling Methods, Edwin P. Maurer, Hugo G. Hidalgo
Utility Of Daily Vs. Monthly Large-Scale Climate Data: An Intercomparison Of Two Statistical Downscaling Methods, Edwin P. Maurer, Hugo G. Hidalgo
Civil, Environmental and Sustainable Engineering
Downscaling of climate model data is essential to local and regional impact analysis. We compare two methods of statistical downscaling to produce continuous, gridded time series of precipitation and surface air temperature at a 1/8-degree (approximately 140 km2 per grid cell) resolution over the western U.S. We use NCEP/NCAR Reanalysis data from 1950–1999 as a surrogate General Circulation Model (GCM). The two methods included are constructed analogues (CA) and a bias correction and spatial downscaling (BCSD), both of which have been shown to be skillful in different settings, and BCSD has been used extensively in hydrologic impact analysis. Both methods …