摘要
气候生产潜力时空动态一直是国内外全球变化研究的热点,基于1951-2000年全国范围气象栅格数据计算气候生产潜力,在此基础上,利用GIS空间分析技术和小波分析方法探讨全国以及9大土地潜力区气候生产潜力的空间格局特征与多时间尺度特征。结果表明:50年间中国气候生产潜力单产平均值为770 g·m^(-2)·a^(-1),折算为总量达73.12×10~8t/a;全国及9大土地潜力区气候生产潜力的多时间尺度特征比较复杂,3～5年周期的年际变化和30年左右周期的年代际变化均较显著,而10～11年周期的变化则仅在部分区域有所表现;总的来说,1951-2000年,华北地区、黄土高原、内蒙古中部及辽河平原等是我国气候生产潜力时空动态特征最突出的区域。
Study on climatic potential productivity has been one of the focuses of global change science. However, few studies which focused on its temporal and spatial dynamics for large scale and long term can be found due to the difficulties to access more data and information with enough precisions. In this paper, temporal-spatial climatic factors datasets with precisions of 10-days and 10 km×10 km cells of China for the past 50 years are available. Supported by the GIS spatial analysis techniques and wavelet analysis method, annual Climatic potential productivity of China from 1951 to 2000 had been calculated and its temporal-spatial dynamic characteristics had been studied. It turned out that ,for the whole country ,the average climatic potential productivity from 1,951 to 2000 was 770 g·m^-2 a^-1, and the gross productivity had amounted to 7.312 billion. The law of regional differentiation for its spatial patterns was quite distinct, especially for the zonality laws. Furthermore, the multi-temporal-scale characteristics of the whole country and nine land potential areas were very complicated. The most distinct characteristic was 3 --5 years period,and secondly,period about 30 years. In brief, the North China, the Loess plateau,the middle part of Inner Mongolia and the Liaohe plain were the hotspot-regions with the most severe temporal and spatial dynamics of climatic potential productivity from 1951 to 2000.
出处
《干旱区地理》
CSCD
北大核心
2008年第5期723-730,共8页
Arid Land Geography
基金
中国博士后科学基金项目(20060390509)
中国科学院知识创新工程重要方向项目(KZCX2-YW-401-4)
国家杰出青年基金项目(30225012)
关键词
气候生产潜力
时空动态
小波分析
中国
土地潜力区
climatic potential productivity
temporal and spatial dynamics
wavelet analysis
China
land potential areas
