China Youth Daily Client News (China Youth Daily, China Youth Network Xi Reporter Yang Jie, Reporter Fan Weichen) Recently, the team of Hu Sletu and Shi Chong, researchers of the State Key Laboratory of Remote Sensing Science of the Aerospace Information Innovation Institute of the Chinese Academy of Sciences (Aerospace Institute), released the near-real-time remote sensing monitoring system for surface solar radiation and high spatiotemporal resolution products (care). This is the world's most high-precision surface solar radiation monitoring system built by China, which has important scientific significance and application value for monitoring and estimating solar power generation, radiation energy balance, agricultural yield estimation, human health, vegetation photosynthesis and carbon sequestration.
The Aerospace Research Institute released a near-real-time remote sensing monitoring system for surface solar radiationCourtesy of the Aerospace Academy.
Surface solar radiation refers to the general term for the components of solar radiation received on the earth's surface (including electromagnetic radiation of different wavelengths such as ultraviolet, visible and infrared), and is the basic energy that drives the changes in the multi-layer processes of the earth system**. Satellite remote sensing technology is one of the most effective means to monitor the change of surface solar radiation due to its strong data continuity and wide coverage.
Husletu pointed out that the traditional surface solar radiation remote sensing data has a series of shortcomings, such as insufficient spatiotemporal resolution, lack of solar radiation component information, and difficulty in distinguishing the direct and scattering components of sunlight transmission direction, which greatly restricts the fine monitoring and application of solar radiation in agriculture, ecology, renewable energy, meteorology and other fields. In recent years, with the rapid development of satellite detection technology, especially the advent of a new generation of geostationary satellites represented by the domestic Fengyun-4, due to the observation advantages of satellite sensors with multispectral and high spatiotemporal resolution, it has provided new opportunities for refined and near-real-time monitoring of surface solar radiation.
Through nearly ten years of efforts, the research team has overcome the theoretical and technical problems of light scattering calculation of different types of clouds and aerosol particles in the atmosphere, comprehensively considered the effects of atmospheric gas absorption and surface reflection in ice-covered areas, developed a new technology combining physical models and artificial intelligence models, developed a near-real-time remote sensing monitoring system for solar radiation in the Asia-Pacific region, and used China's Fengyun-4 and the Japan Meteorological Agency Sunflower 8 The observation data of the No. 9 geostationary meteorological satellite constructed a set of remote sensing products with high spatial and temporal resolution, with a spatial resolution of 1 to 5 km and an observation frequency of 10 to 15 minutes, realizing the ability of high-precision, high-frequency, refined and near-real-time surface solar radiation monitoring.
Shi Chong introduced that the solar radiation near-real-time remote sensing monitoring system can provide 12 kinds of surface solar radiation data products, including solar short-wave radiation, photosynthetically active radiation, ultraviolet A radiation, ultraviolet B radiation, and the total radiation, direct radiation and scattering components of each radiation component. Compared with similar international satellite remote sensing products or reanalysis data, the product has achieved significant improvement in spatiotemporal resolution and accuracy, especially in the monitoring of ice and snow coverage areas and areas with rapid changes in solar radiation under clouds, such as the Qinghai-Tibet Plateau.
The research team was completed by the research team, together with the National Space Science Center of the Chinese Academy of Sciences, the National Satellite Meteorological Center, Sun Yat-sen University, the Chinese Academy of Meteorological Sciences, the Japan Aerospace Exploration Agency, Tokai University, the British Met Office and other domestic and foreign research institutions. The near-real-time remote sensing monitoring system and remote sensing products of surface solar radiation are released and shared in the cloud remote sensing, atmospheric radiation and renewable energy (CARE)** developed by the team. The research was supported by the Second Comprehensive Scientific Expedition to the Tibetan Plateau and the National Science Program for Distinguished Young Scholars, as well as data from the National Satellite Meteorological Center of the China Meteorological Administration.
*: China Youth Daily client).