摘要
利用北京山区 1km2 网格的气候资料 ,应用桑斯维特纪念模型与迈阿密模型对各网格点的植物气候生产力进行了估算 ,并利用地理信息系统软件ArcGis与ArcView对估算结果进行了可视化处理。结果显示 ,北京山区植物气候生产力总体分布趋势由东向西递减 ,高值区集中在东北部山区的平谷中部及密云南部 ;低值区主要集中在西部山区包括门头沟西部、延庆、怀柔北部地区。除部分海拔较高的中山区以外 ,水分条件是北京山区植物气候生产力的主要限制因子 ,大部地区水分亏缺量在 130～ 2 6 0mm。用遥感方法对 2种模型的估算结果进行了验证 ,模型估算结果与北京山区植被指数 (NDVI)的相关性均达到了 0 0 1的显著性水平 ,且桑斯维特纪念模型的估算结果好于迈阿密模型。
The plant climatic production potential (PCPP) of Beijing mountain area separated into 1?km2 grids was calculated with Miami and Thornthwaite-Memorial model using climatic data. The PCPP data were finally transferred to visual images with a software of ArcGis and ArcView. The results showed that the PCPP decreased form east to west. The northeast parts of southern Miyun and middle Pinggu had a highest PCPP, but the lowest PCPP was found the west of Mentougou County, the north of Huairou County and the most part of Yanqing County, where both the temperature and precipitation were low. Except the high altitude area, water condition was the main limited factor of the PCPP in this region.The conclusion was confirmed by the results of the analysis with the Miami model. The water deficit was at the range of 130-260?mm. The result of the PCPP was validated by the method of remote sensing. The relationship between the PCPP and NDVI was significant at to 0.01 level.The estimated results of Thornthwaite-Memorial model was better than the Miami model.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2004年第6期21-26,共6页
Journal of China Agricultural University
基金
北京市自科学基金重点项目 (6 0 310 0 1)
关键词
小网格
地理信息系统
植物气候生产力
限制因子
植被指数
grid
geographic information system (GIS)
plant climatic production potential
restricting factor
NDVI
