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基于甘肃河东地区61个气象近30a(1971—2000年)的气温资料计算了≥0℃、≥10℃积温;利用地理信息系统(GIS)技术对≥0℃和≥10℃积温进行了数据栅格化.结果表明:甘肃省河东地区≥0℃积温、≥10℃活动和有效积温与经度和海拔的相关性达到极显著水平,推算积温与实际积温的相对误比较小,数据栅格化的≥0℃积温、≥10℃活动和有效积温空间分布比实际积温更突显地域差别,这种巨大差异对农业结构的多样性发展提供了条件;气候变暖使热量资源增加,对农业的影响还与降水资源有关系.
Based on the temperature data of 61 meteorological stations in the east of Gansu in the past 30 years (from 1971 to 2000), the accumulated temperature of ≥0 ℃ and ≥10 ℃ was calculated. The data grid of ≥0 ℃ and ≥10 ℃ were calculated by GIS. The results showed that the correlation between the activities of ≥0 ℃ and ≥10 ℃ and the longitude and altitude of Hedong area in Gansu Province reached extremely significant level, and the relative error between the calculated accumulated temperature and the actual accumulated temperature was small. The data rasterization ≥0 ℃ accumulated temperature, ≥10 ℃ active and effective accumulated temperature spatial distribution more prominent than the actual accumulated regional differences, such a huge difference in the diversity of agricultural structures to provide the conditions for development; climate warming so that heat resources, the impact on agriculture also Related to precipitation resources.