Study on grid technology of agricultural climate-environmental information in China

The development GIS and RS technology makes it possible that agricultural climate resources in large scale can be calculated in tiny grid. In this paper, meteorological observatory network in China is set up first using GIS based on DEM data and data from all observatories; then the geographical and topographical factors are girded and parameterized by kriging interpolation to produce the meteorological data and elevation, slope and aspect data in 1 × 1 km grid. The monthly surface albedo data and atmosphere total transmittance data in 2001 are reversal in national scale with TERRA/MODIS data. The impact on solar radiation from factors of slope, aspect and topographical shadow is analyzed quantitatively, and solar radiation calculation model in hillside is built and agricultural climate environmental information is girded. Agricultural climate-environmental information grid not only can greatly improve the observation materials in agricultural climate to share with, but also can facilitate understanding the spacious and temporal change law of agricultural climate resources.