Estimation method and apparatus for ground surface thermal state distribution at regular grid in permafrost region

An estimation apparatus for ground surface thermal state distribution at regular grid in permafrost region, wherein the device comprises:

• a temperature acquisition module, configured to obtain measured temperature information and predicted temperature information of a target permafrost region, wherein the measured temperature information comprises measured ground surface temperatures at multiple observation scales;
• the predicted temperature information comprises predicted ground surface temperatures at multiple observation scales;
• and the multiple observation scales show a pattern of progressive transition, wherein the temperature acquisition module is further configured to:
• obtain the measured temperature information of the target permafrost region by a multi-stage temperature sensor array deployed in the target permafrost region, wherein the lower-stage array in the multi-stage temperature sensor array is distributed in a grid of the upper-stage array, and the lower-stage array and the upper-stage array comprise the same number of temperature sensors and have the same distribution pattern;
• obtain vegetation information, soil information, climate information, and topographic information of the target permafrost region;
• and
• process the vegetation information, soil information, climate information, and topographic information by a pre-trained temperature prediction model, so as to obtain predicted temperature information of the target permafrost region;
• a temperature optimization module, configured to correct the predicted temperature information by a pre-constructed semi-variational function model to obtain optimized predicted temperature information, wherein the semi-variational function model characterizes a measurement error of the ground surface temperatures, a spatial variability, and a maximum distance of a spatial autocorrelation in the target permafrost region, and
• further configured to combine the optimized predicted temperature information with the measured temperature information to obtain ground surface temperature information of the target permafrost region;
• and
• a map drawing module, configured to generate a ground surface thermal state distribution map of the target permafrost region based on the ground surface temperature information of the target permafrost region.