Study on the Climate Effect of Surface Albedo Change in Qilian Mountains Based on WRF
Surface albedo is a parameter that has the greatest impact on the balance of land surface radiative energy.It is an impor-tant physical quantity in land surface process.Its change directly affects the balance of land surface energy,and then can affect other meteorological elements such as temperature and precipitation.In this study,the WRF model was used to replace the low spatial-tem-poral resolution of the original model with MODIS surface albedo products.Two sets of numerical simulation experiments were con-ducted to investigate the effects of surface albedo change on temperature,sensible heat flux and latent heat flux in Qilian Mountains,and the influence mechanism of surface albedo change on temperature change was analyzed in detail.The results showed that the de-fault albedo products of WRF had a high overestimation,especially in snow-covered areas.After replacing the satellite remote sens-ing products,the WRF model can more accurately simulate the temperature change process on a monthly scale,and obviously im-prove the cold bias of the model simulation.When the surface albedo decreases(increases),sensible heat and latent heat increase(de-crease),and the change of sensible heat flux is greater than that of latent heat flux.
surface albedoWRF modesatellite remote sensing data assimilationQilian Mountains
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NSTL
万方数据
