CLIMATE CHANGE IN THE HIMALAYAN CHAIN & ITS IMPACTS

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Presentation transcript:

CLIMATE CHANGE IN THE HIMALAYAN CHAIN & ITS IMPACTS Geoffrey Boulton with Magnus Hagdorn, Nick Hulton, Hugh Sinclair, Pete Nienow School of Geosciences University of Edinburgh

Ganges/Brahmaputra/Indus Flux: ≈ 1,200 km3/year Ice & snowmelt Flux to Plains: ≈ 400 km3/year (mostly in the dry season) Ice & snowmelt ≈ 80-85% of Ganges dry season flow In last 30 yrs - 11% reduction in dry season flow

Nepal transect Highest ELA Peaks 6000m envelope 5000m LIA LGM 4000m Mean lowest winter snowline LIA - Little Ice Age LGM - Last Glacial Maximum 3000m 50km swathe mean topography 30 km 60 km

Representative October Images 1976 1989 2000