Land surface temperature (LST) and its diurnal variation are the critical factors in many aspects of climate study, surface energy balance, and environmental applications. Several satellite-based LST products are available for retrievals from regional to a global scale. However, due to the differences in sensor configurations and retrieval algorithms, these products may not necessarily be consistent. In this letter, the consistency of spatial and temporal skin temperature variations from two infrared satellite platforms has been evaluated over the contiguous United States (CONUS). Comparisons are made between the LST products from the newly launched Geostationary Operation Environmental Satellite R Series (GOES-R) advanced baseline imager (ABI) and the Moderate Resolution Imaging Spectroradiometer (MODIS) on both Aqua and Terra satellites which are polar orbiting. Overall, both products show a general agreement in their diurnal variations with differences mostly under 2 K. However, a temperature-dependent inconsistency has been detected. The MODIS LST product seems to estimate higher temperatures in the summer months while the GOES product estimates higher temperatures during the winter months. Moreover, the maximum observed diurnal differences could reach up to 10 K in mountainous regions. The results suggest that the corresponding temperature differences should be accounted for when LST diurnal variations are compared or generated from satellite observations.

中文翻译：

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GOES-16 ABI和MODIS仪器地表温度日变化比较

地表温度 (LST) 及其日变化是气候研究、地表能量平衡和环境应用的许多方面的关键因素。几种基于卫星的 LST 产品可用于从区域到全球范围的检索。但是，由于传感器配置和检索算法的差异，这些产品可能不一定一致。在这封信中，评估了美国本土 (CONUS) 上两个红外卫星平台的空间和时间皮肤温度变化的一致性。对新推出的地球同步运行环境卫星 R 系列 (GOES-R) 高级基线成像仪 (ABI) 和中分辨率成像光谱仪 (MODIS) 的 LST 产品在极地轨道的 Aqua 和 Terra 卫星上进行了比较。总体而言，这两种产品在其昼夜变化方面表现出普遍一致，差异主要在 2 K 以下。然而，已检测到温度相关的不一致。MODIS LST 产品似乎估计夏季月份的温度较高，而 GOES 产品估计冬季月份的温度较高。此外，在山区观测到的最大昼夜差异可达 10 K。