The integrated land surface data assimilation system V1.0 developed by Meng Chunlei obtained the copyright certificate of computer software.

Based on the independently developed integrated land surface model, the applicant invented a four-dimensional variational assimilation algorithm to assimilate soil temperature, humidity and impervious water surface temperature, and adopted different algorithms to assimilate parameters such as snow cover, leaf area index, albedo and vegetation coverage rate, and independently developed a combined land surface data assimilation system.

The system can be coupled with numerical prediction models and climate models to improve the accuracy of weather prediction and climate prediction.At the same time, it can generate high-resolution, multi-parameter and long series land surface data sets covering natural and urban underlying surfaces, which have a wide range of applications in transportation, agriculture, hydrology, ecology and urban thermal environment.

Figure 1. Comparison of soil temperature before and after assimilation with observed values

Figure 2. Comparison of soil moisture before and after assimilation with observed values