Uncertainties in climate responses to past land cover change: First results from the LUCID intercomparison study

Details Uncertainties in climate responses to past land cover change: First results from the LUCID intercomparison study Uncertainties in climate responses to past land cover change: First results from the LUCID intercomparison study

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3614814p&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 14, CiteID L14814

Physics

36

Global Change: Land Cover Change, Global Change: Land/Atmosphere Interactions (1218, 1843, 3322), Global Change: Impacts Of Global Change (1225), Global Change: Global Climate Models (3337, 4928), Global Change: Atmosphere (0315, 0325)

Scientific paper

Seven climate models were used to explore the biogeophysical impacts of human-induced land cover change (LCC) at regional and global scales. The imposed LCC led to statistically significant decreases in the northern hemisphere summer latent heat flux in three models, and increases in three models. Five models simulated statistically significant cooling in summer in near-surface temperature over regions of LCC and one simulated warming. There were few significant changes in precipitation. Our results show no common remote impacts of LCC. The lack of consistency among the seven models was due to: 1) the implementation of LCC despite agreed maps of agricultural land, 2) the representation of crop phenology, 3) the parameterisation of albedo, and 4) the representation of evapotranspiration for different land cover types. This study highlights a dilemma: LCC is regionally significant, but it is not feasible to impose a common LCC across multiple models for the next IPCC assessment.

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