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Subsurface temperatures and air temperatures coupled at decadal and centennial time scales

PI: Henry N. Pollack
Institution: University of Michigan
Abstract:
My interest is in the computational quantities sometimes referred to as the "ground surface temperature", "shallow soil temperature", and "deep soil temperature". These are computed only for continental regions, and perhaps not by all models. My interest stems from my extensive experience in analyzing subsurface temperature records in terms of reconstructing past climate change. Questions arise as to how strongly and faithfully subsurface temperatures and air temperatures are coupled at decadal and centennial time scales. We have substantial empirical data comprising both air and ground temperatures, and the energy fluxes across the air-ground interface, to compare with climate model output of these quantities. The relevance to the climate modeling community is an assessment of how well various air-ground coupling schemes perform.
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