Abstract
Abstract. In order to estimate biogeophysical effects of historical land cover change on climate during last three centuries, a set of experiments with a climate system model of intermediate complexity (MPM-2) is performed. In response to historical deforestation, the model simulates a decrease in annual mean global temperature in the range of 0.07–0.14 °C based on different grassland albedos. The effect of land cover changes is most pronounced in the middle northern latitudes with maximum cooling reaching approximately 0.6 °C during northern summer. The cooling reaches 0.57 °C during northern spring owing to the large effects of land surface albedo. These results suggest that land cover forcing is important for study on historical climate change and that more research is necessary in the assessment of land management options for climate change mitigation.
Highlights
In order to allow long model integrations and simulate the response with interactive components in Earth system, an Earth system model of intermediate complexity (EMIC), McGill Paleoclimate Model-2 (MPM-2) (Wang and Mysak, 2000), is used to study biogeophysical effects of historical land cover changes on climate and their seasonal effects based on different grassland albedo
MPM-2 is used to investigate the biogeophysical effects of historical land cover change on the earth during the last three centuries based on different grassland albedos, and to assess the response of the climate system to the land cover change seasonally
It is likely that differences in how land cover change effects are affected by surface albedo configuration explains in large part the differences that are shown in simulations of land cover change, which is in line with Myhre and Myhre (2003)
Summary
Previous studies of this effect of historical historical deforestation could be modeled appropriately, the land cover change have revealed a global averaged cooling seasonal response of climate to historical land cover change effect, which is the response to modified suHrfaycde raolbleodogayndandis less certain. In order to allow long model integrations and simulate the response with interactive components in Earth system, an Earth system model of intermediate complexity (EMIC), MPM-2 (Wang and Mysak, 2000), is used to study biogeophysical effects of historical land cover changes on climate and their seasonal effects based on different grassland albedo. The large spread of temperature results from previous studies of land cover change highlights the need for further study on climate sensitivity based on different surface albedos
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