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Detailed Reference Information |
Douglas, E.M., Niyogi, D., Frolking, S., Yeluripati, J.B., Pielke, R.A., Niyogi, N., Vörösmarty, C.J. and Mohanty, U.C. (2006). Changes in moisture and energy fluxes due to agricultural land use and irrigation in the Indian Monsoon Belt. Geophysical Research Letters 33: doi: 10.1029/2006GL026550. issn: 0094-8276. |
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We present a conceptual synthesis of the impact that agricultural activity in India can have on land-atmosphere interactions through irrigation. We illustrate a "bottom up" approach to evaluate the effects of land use change on both physical processes and human vulnerability. We compared vapor fluxes (estimated evaporation and transpiration) from a pre-agricultural and a contemporary land cover and found that mean annual vapor fluxes have increased by 17% (340 km3) with a 7% increase (117 km3) in the wet season and a 55% increase (223 km3) in the dry season. Two thirds of this increase was attributed to irrigation, with groundwater-based irrigation contributing 14% and 35% of the vapor fluxes in the wet and dry seasons, respectively. The area averaged change in latent heat flux across India was estimated to be 9 Wm-2. The largest increases occurred where both cropland and irrigated lands were the predominant contemporary land uses. |
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Abstract |
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Keywords
Hydrology, Climate impacts, Global Change, Regional climate change, Hydrology, Human impacts, Hydrology, Irrigation, Hydrology, Land/atmosphere interactions (1218, 1631, 3322) |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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