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Land management and land-cover change have impacts of similar magnitude on surface temperature

Sebastiaan Luyssaert 1 Mathilde Jammet 2 Paul C. Stoy 3 Stephan Estel 4 Julia Pongratz 5 Galina Churkina 4 Axel Don 6 Karlheinz Erb 7 Morgan Ferlicoq 5 Bert Gielen 8 Thomas Grünwald 9 Richard A. Houghton 10 Katja Klumpp 11 Alexander Knohl 12 Thomas Kolb 13 Tobias Kuemmerle 14 Tuomas Laurila 15 Annalea Lohila 15 Denis Loustau 16 Matthew J. Mcgrath 1 Patrick Meyfroidt 17 Eddy J. Moors 18 Kim Naudts 1 Kim Novick 19 Juliane Otto 1 Kim Pilegaard 20 Casimiro A. Pio 21 Serge Rambal 22 Corinna Rebmann 23 James Ryder 24 Andrew E. Suyker 25 Andrej Varlagin 26 Martin Wattenbach 27 A. Johannes Dolman 28
Abstract : Anthropogenic changes to land cover (LCC) remain common, but continuing land scarcity promotes the widespread intensification of land management changes (LMC) to better satisfy societal demand for food, fibre, fuel and shelter. The biophysical effects of LCC on surface climate are largely understood, particularly for the boreal and tropical zones, but fewer studies have investigated the biophysical consequences of LMC; that is, anthropogenic modification without a change in land cover type. Harmonized analysis of ground measurements and remote sensing observations of both LCC and LMC revealed that, in the temperate zone, potential surface cooling from increased albedo is typically offset by warming from decreased sensible heat fluxes, with the net effect being a warming of the surface. Temperature changes from LMC and LCC were of the same magnitude, and averaged 2 K at the vegetation surface and were estimated at 1.7 K in the planetary boundary layer. Given the spatial extent of land management (42-58% of the land surface) this calls for increasing the efforts to integrate land management in Earth System Science to better take into account the human impact on the climate.
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Sebastiaan Luyssaert, Mathilde Jammet, Paul C. Stoy, Stephan Estel, Julia Pongratz, et al.. Land management and land-cover change have impacts of similar magnitude on surface temperature. Nature Climate Change, Nature Publishing Group, 2014, 4 (5), pp.389-393. ⟨10.1038/nclimate2196⟩. ⟨hal-02641525⟩



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