上海城市精细化地表温度分布模拟

本文引入了一种模拟城市复杂下垫面地表温度的方法，该方法基于地表辐射参数化方案（NARP）计算城市净辐射通量，然后利用客观滞后模型OHM计算地表储热通量，再利用强迫恢复法计算表面温度。通过上海地区高分辨率卫星资料获取不同地表类型覆盖比例，以每个格点中各地表覆盖类型所占面积比例为权重计算格点的平均地表温度，并对2013年8月12日上海地区地表温度进行模拟。结果表明：上海城市下垫面与其他类型下垫面相比，地表温度白天升高较快，而夜间下降较慢。模拟结果与MODIS陆面温度及地面观测资料进行比较，模拟的上海地表温度分布结构更精细，与气象站观测值较接近。

Refined simulation of urban surface temperature distribution in Shanghai

A method to simulate complex urban surface temperature was introduced. This method can be used to calculate urban net radiation flux based on a net all-wave radiation parameterization (NARP), and storage heat flux was obtained by an objective hysteresis model (OHM). Surface temperature was then calculated by a force-restore method. Different surface cover fractions were obtained using high-resolution satellite data in Shanghai, and then the average surface temperature in a grid box was determined with weights of area fractions of each land-cover types within the grid. The surface temperature on August 12, 2013 was simulated in Shanghai. The results show that the urban surface temperature increases rapidly in a daytime compared with that of other surface cover types, while it decreases slowly in a nighttime. By comparing the simulation results between MODIS land surface temperature and ground observational data, the spatial distribution of simulated surface temperature is more refined and closer to the ground observed data.