The Distributed Simulation Of Light And Heat Resources In Ningxia

This paper simulated the spatiotemporal distribution of light and heat resources in Ningxia, by taking GIS as platform and by using observational data from conventional meteorological stations, and monthly global radiation、monthly direct solar radiation and monthly scatter radiation from solar radiation stations in and around Ningxia from1961to2000and1:250,000DEM. We also finished the space mapping of monthly average temperature (maximum temperature, minimum temperature) and direct solar radiation, scatter radiation and terrain reflected radiation and global radiation over rugged terrains in Ningxia in2001with resolution of100m×100m. The study above put forward practical solutions for the research of climatic resources in Ningxia, and we also put forward basic data for the analysis and utilization of climatic resources over hilly areas in Ningxia.This paper mainly finished the following topics:(1)We established the series of solar radiation model for Ningxia area, by taking distribution model as core technique. We also considered the mutual-covering effect of slope, aspect and terrain to astronomical radiation over rugged terrains. Then, we finished the distributed simulation of global solar radiation over rugged terrains in Ningxia based on DEM, taking astronomical radiation as initial data.(2) We used data from1961to2000to fit the result of different model for horizontal global radiation by monthly regional model, coupled with the percentage of sunshine data in Ningxia in2001with remote sensing data incorporated. Finally, we calculated direct radiation, scattered radiation, reflective radiation and global radiation over rugged terrains with the resolution of100m×100m, then we also analyzed its time and space distribution feature and the pattern of local variation.(3) We established the distributed calculation model for heat energy, including many parameters, such as altitude, global solar radiation, and long-wave radiation, based on the distributed simulation of solar radiation in Ningxia former realized. Then we analyzed the distribution feature of heat resources in Ningxia and pictured the spatial distribution map of monthly average temperature (monthly maximum temperature, monthly minimum temperature) in Ningxia and then realized the quantitative spatial expansion from solar radiation over hilly areas to heat resources.(4)The result shows that, solar and heat recourse in Ningxia after distribution calculation better reflect the trend of macro-distribution and pattern of local variation. We could easily find out the effect of terrain to solar radiation and average temperature (maximum temperature, minimum temperature) is pretty clear. Our result clearly reflect the distribution features of local temperature in sunny slope and shady slope,because we fully considered the effect of local factors to solar radiation over hilly areas.such as slope, aspect and surface albedo. Therefore, our simulation result is reliable and reasonable.