关键词: 气候舒适度, GridMet模型, 温湿指数, 空间分布, 地形影响, 浙江省

Abstract:

The temperature and humidity index is one of the climate comfort evaluation models, which reflects the heat exchange between human body and the surrounding environment through the combination of temperature and humidity.Based on the GridMet model, the spatial distribution of temperature and humidity indices(THI)in ZhejiangProvince(100 m×100 m)weresimulated by using monthly average air temperature, relative humidity from 71 meteorological stations, and MODIS 05over Zhejiang and surrounding areas during 2003-2018. Furthermore, we analyzed the distribution characteristics of THI in Zhejiang with the terrain factors (elevation, gradient, slope direction). The influence of terrain factors on the spatial distribution of the THIwas discussed. The results show that most montane areas in Zhejiang were more comfortable in summer due to the topographic influence, and thus, are suitable for establishing summer tourism projects. Specifically, among the three topographic factors of elevation, slope, and aspect, the THI in January changed the most with the slope direction and the least in July.On the same slope, the change of slope degree had a greater impact on the THI in January, while the change of altitude had the greatest impact in July. The THI in January on the south slope increased slightly with the increase of elevation and slope degree, while in other months on the south slope and on the north slopeTHI increased slightly with the elevation, and the sum of the THI decreased with the increase of slope gradient. Compared with the south slope, the influences of elevation and slope gradient on THIwere more obvious on the north slope.

Key words: climate comfort degree GridMet model, THI, spatial distribution, topographic influences, Zhejiang province