Articles | Volume 7, issue 4
Earth Syst. Dynam., 7, 863–876, 2016
https://doi.org/10.5194/esd-7-863-2016
Earth Syst. Dynam., 7, 863–876, 2016
https://doi.org/10.5194/esd-7-863-2016

Research article 10 Nov 2016

Research article | 10 Nov 2016

Ocean–atmosphere interactions modulate irrigation's climate impacts

Nir Y. Krakauer et al.

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Cited articles

Alter, R. E., Im, E.-S., and Eltahir, E. A. B.: Rainfall consistently enhanced around the Gezira Scheme in East Africa due to irrigation, Nat. Geosci., 8, 763–767, https://doi.org/10.1038/ngeo2514, 2015.
Bonan, G. B., Pollard, D., and Thompson, S. L.: Effects of boreal forest vegetation on global climate, Nature, 359, 716–718, https://doi.org/10.1038/359716a0, 1992.
Bonfils, C. and Lobell, D.: Empirical evidence for a recent slowdown in irrigation-induced cooling, P. Natl. Acad. Sci. USA, 104, 13582–13587, https://doi.org/10.1073/pnas.0700144104, 2007.
Boucher, O., Myhre, G., and Myhre, A.: Direct human influence of irrigation on atmospheric water vapour and climate, Clim. Dynam., 22, 597–603, https://doi.org/10.1007/s00382-004-0402-4, 2004.
Bretherton, C. S., Widmann, M., Dymnikov, V. P., Wallace, J. M., and Bladé, I.: The effective number of spatial degrees of freedom of a time-varying field, J. Climate, 12, 1990–2009, 1999.
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Short summary
We simulated effects of irrigation on climate with the NASA GISS global climate model. Present-day irrigation levels affected air pressures and temperatures even in non-irrigated land and ocean areas. The simulated effect was bigger and more widespread when ocean temperatures in the climate model could change, rather than being fixed. We suggest that expanding irrigation may affect global climate more than previously believed.
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