Abstract:

Based on the meteorological data in 80 weather stations from 1961 to 2010, we analyzed variation characteristics of climate changing in Gansu. The results showed that, main feature of climate changing was hot-drying. The annual climatic trend rate in Gansu showed positive. The annual mean temperature increased by 0.29℃ every ten years and accumulated by 1.4℃ in a half century. The turning point appeared in 1977. The accumulated temperature above 0℃ increased by range of 40℃ to 80℃ every ten years. The precipitation showed a decreasing trend since 1961 and the precipitation departure decreased with 1.7% every ten years. Bounded by the Yellow River, the precipitation increased by 4 mm to 12 mm in the western and decreased by 10 mm to 30 mm in the eastern every ten years. The annual sunshine duration decreased by 9.8 hours every ten years and the trend of hot-drying went slowly in 21st century. The influence characteristics of climate changing on growth, planting region, meteorological disaster, biomass, yield and quantity of malting barley, hop, lily, pepper, oil olive, Chinese chestnut and day lily sec. seven special crops had been found in this paper. We suggested that, climate hot-drying exerted various and complex influence on plant, both of advantages and disadvantages. The refine and comprehensive regionalization for special crops had been made. We suggested that the high quality goods production plant base should been set up in optimum district and special crops field modern management should been established in order to adapt climate change. We should adjust the plant structure by climate forecast and pay more attention on meteorological disaster monitoring, assessment, early warning and defense.