关键词: 气候生产潜力, 时空特征, 河西走廊

Abstract: Based on temperature and precipitation data of the summer half year during 1971—2006 from 20 meteorological stations in the Hexi Corridor, the climate productivity potential was calculated by making use of the Thornthwaite Memorial model. Mann-Kendall, EOF and sensitivity analysis were used to study its temporal and spatial changes. The results showed that agro-climatic resources and geographic location were closely related, and the southeast of the Hexi Corridor was superior to the northwest. A significant warming in the Hexi Corridor in recent years reduced the climate productivity potential significantly, and the maximum reduction center of the climate productivity potential shifted westward in these years, and it severely limited the agricultural production in western Hexi Corridor. The response of climate productivity potential to temperature was more obvious in eastern Hexi Corridor than in western Hexi Corridor, and response of the climate productivity potential to precipitation was more obvious in western Hexi Corridor, especially in the desert edge, than in eastern Hexi Corridor. The climate productivity potential increased generally under the background of warming and wetting. The influence of precipitation on climate productivity potential is more obvious than that of the temperature in agricultural areas, so precipitation is the most important factor influencing climatic productivity potential.

Key words: climate productivity potential, spatiotemporal change, Hexi Corridor