Modulation of Land-Use Change Impacts on Temperature Extremes via Land–Atmosphere Coupling over Australia

Earth Interactions

A L.Hirsch¹ 

关键词: Atmosphere–land interaction;    Hydrometeorology;    Land surface model;   

DOI  :  10.1175/EI-D-15-0011.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

AbstractThe role of land–atmosphere coupling in modulating the impact of land-use change (LUC) on regional climate extremes remains uncertain. Using the Weather and Research Forecasting Model, this study combines the Global Land–Atmosphere Coupling Experiment with regional LUC to assess the combined impact of land–atmosphere coupling and LUC on simulated temperature extremes. The experiment is applied to an ensemble of planetary boundary layer (PBL) and cumulus parameterizations to determine the sensitivity of the results to model physics. Results show a consistent weakening in the soil moisture–maximum temperature coupling strength with LUC irrespective of the model physics. In contrast, temperature extremes show an asymmetric response to LUC dependent on the choice of PBL scheme, which is linked to differences in the parameterization of vertical transport. This influences convective precipitation, contributing a positive feedback on soil moisture and consequently on the partitioning of the surface turbu...

【 授权许可】

Unknown