ABSTRACT

Land surface temperature (LST) is an atmosphere-land interaction, which represents the first thermal reaction of the environmental changes occurring in the earth surface, being one of the most important factors used in the earth sciences. Jazmourian basin, in the southeast of Iran, is a fertile agricultural land with diverse topography and unique climatic conditions. Due to its significance as one of the most important agricultural poles of Iran, the LST variations are of great interest due to their high impact on the environmental processes, especially in the land cover. In recent years, Moderate Resolution Imaging Spectroradiometer images have been extensively used to estimate the LST due to their spatial and temporal homogeneity and freely available showing improved capabilities of climate analysis in the areas with scarce observation networks. We used a combination of MOD11C3 and MYD11C3 products of daytime and nighttime LST, covering the complete circadian cycle over Jazmourian basin, from 2003 to 2019. Results showed varied trends by months with a significantly positive increase in January. The spatial distribution revealed a generalized positive anomaly in the whole study area, with the highest values in central lowlands and lowest at eastern high elevations of the basin. The temporal and spatial analyses indicated high temperature differences between months and seasons as well as a wide range from −10°C to 65°C.

摘要

地表温度（LST）是一种大气与陆地的相互作用，它代表了地球表面发生的环境变化的第一个热反应，是地球科学中最重要的因素之一。Jazmourian盆地位于伊朗东南部，是一片肥沃的农田，地形多样，气候条件独特。由于其作为伊朗最重要的农业极之一的重要性，LST 变化因其对环境过程的高度影响而引起了极大的兴趣，特别是在土地覆盖方面。近年来，中分辨率成像光谱辐射计图像因其空间和时间均匀性而被广泛用于估计地表温度，并且可以免费获得，显示出在观测网络稀缺地区的气候分析能力有所提高。我们使用了白天和夜间 LST 的 MOD11C3 和 MYD11C3 产品的组合，涵盖了 Jazmourian 盆地从 2003 年到 2019 年的完整昼夜周期。结果显示了不同月份的变化趋势，1 月份显着正增长。空间分布呈现出整个研究区普遍存在的正异常，在盆地中部低地最高，在盆地东部高海拔地区最低。时空分析表明，月份和季节之间的温差很大，范围从-10°C到65°C。空间分布呈现出整个研究区普遍存在的正异常，在盆地中部低地最高，在盆地东部高海拔地区最低。时空分析表明，月份和季节之间的温差很大，范围从-10°C到65°C。空间分布呈现出整个研究区普遍存在的正异常，在盆地中部低地最高，在盆地东部高海拔地区最低。时空分析表明，月份和季节之间的温差很大，范围从-10°C到65°C。