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Representations of the atmospheric boundary layer in global climate models : ウィキペディア英語版 | Representations of the atmospheric boundary layer in global climate models
Representations of the atmospheric boundary layer in global climate models play a role in simulations of past, present, and future climates. Representing the atmospheric boundary layer (ABL) within global climate models (GCMs) are difficult due to differences in surface type, scale mismatch between physical processes affecting the ABL and scales at which GCMs are run, and difficulties in measuring different physical processes within the ABL. Various parameterization techniques described below attempt to address the difficulty in ABL representations within GCMs. == What is the ABL? == The ABL is the lowest part of the Earth's atmosphere, the troposphere. The ABL is the only part of the troposphere in contact with the Earth's surface, so the ABL is directly affected by forcings originating at the surface. Such forcings include: heat flux, moisture flux, convection, friction, pollutant emission, and topographically modified flow. Response times to these forcings typically are an hour or less.〔
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