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(a) Present-day water vapour flux from irrigation (kg m−2 yr−1). Data from Döll & Siebert (2000, 2002) as presented by Boucher et al. (2004). (b) Effect of present-day irrigation on surface temperature (K) in the LMD GCM. Difference in temperature (K) between simulations with and without irrigation. Boucher et al. (2004), copyright Springer-Verlag.
