An Idealized Prototype for Large-Scale Land-Atmosphere Coupling

摘要: AbstractA process-based, semianalytic prototype model for understanding large-scale land–atmosphere coupling is developed here. The metric quantifying the sensitivity of precipitation P to soil moisture W, . For a range parameters typical conditions found over tropical or summertime continents, measure exhibits broad minimum at intermediate values. This attributed trade-off between evaporation (or evapotranspiration) E and convergence across states. water-limited, low conditions, dominated by evaporative , reflecting high potential Ep arising from relatively warm surface moisture-deficient atmospheric column under dry conditions. By contrast, energy limited) becomes slightly negative as decreases. However, because increase strongly wi...