Evaluating the impacts of land use and land cover changes on surface air temperature using the WRF-mosaic approach
Evaluating the impacts of land use and land cover changes on surface air temperature using the WRF-mosaic approach
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使用 WRF-mosaic 方法评估土地利用和土地覆盖变化对地表气温的影响
DOI：
10.1080/16742834.2018.1461527
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发表时间：
2018
影响因子：
2.3
通讯作者：
Wu Jian
中科院分区：
文献类型：
--
作者：
Zhao Deming;Wu Jian
利用1980年和2010年的卫星获取的地表数据，描述了东亚和中国过去几十年来经济快速发展和人类活动导致的土地利用和土地覆被（LULC）变化。使用天气研究与预报（WRF）模型探讨了该时期LULC变化对辐射收支和2 m地表气温（SAT）的影响。镶嵌方法，它考虑了N-最丰富的土地利用类型在一个模型网格单元（这里，N= 3），并精确地描述了亚网格尺度LULC的变化，在集成中采用。基于两个36年的整合的LULC变化的影响表明，SAT普遍下降，唯一的例外是中国东部，导致中国（-0.062 °C）和东亚陆地地区（EAL，-0.061 °C）的SAT下降。LULC的变化引起的变化，影响辐射收支。中国大气顶部的辐射强迫为-0.56 W m− 2，EAL为-0.50 W m− 2。同时，粗糙度的改变主要影响近地面风速、大尺度和向上的水汽通量、潜热通量和不同高度的云分数。虽然LULC变化对区域尺度的影响一般较小，但在局地尺度上的影响要大得多。
Satellite-derived land surface data in 1980 and 2010 were used to represent land use and land cover (LULC) changes caused by the rapid economic development and human activities that have occurred over the past few decades in East Asia and China. The effects of LULC changes on the radiation budget and 2-m surface air temperature (SAT) were explored for the period using the Weather Research and Forecasting (WRF) model. The mosaic approach, which considers theN-most abundant land use types within a model grid cell (here,N= 3) and precisely describes the subgrid-scale LULC changes, was adopted in the integrations. The impacts of LULC changes based on two 36-year integrations showed that SAT generally decreased, with the sole exception being over eastern China, resulting in decreased SAT in China (−0.062 °C) and East Asian land areas (EAL, −0.061 °C). The LULC changes induced changes in albedo, which influenced the radiation budget. The radiative forcings at the top of the atmosphere were −0.56 W m−2across the whole of China, and −0.50 W m−2over EAL. Meanwhile, the altered roughness length mainly influenced near-surface wind speeds, large-scale and upward moisture fluxes, latent heat fluxes, and cloud fractions at different altitudes. Though the impacts caused by the LULC changes were generally smaller at regional scales, the values at local scales were much stronger.