摘要
负积温是表征霜期农业生产热量资源的生态指标之一,通过对辽宁省48个气象站1961～1990年日平均气温观测资料进行统计,计算了冬季(11月至翌年3月)各月及整个冬季的负积温值,并分析其地理分布特征;利用地理信息系统技术,建立了负积温多年平均值与经度、纬度和海拔高度的小网格推算模型,并在ARCGIS平台上制作负积温数字图像,大大提高了传统手段分析负积温的精度,为发展霜期农业生产和农业结构调整提供依据.
The negative accumulated temperature is an ecological indicator of heat resources in agriculture production in winter. In order to accelerate the agriculture development in frost season and give full play to the land resources, it is essential to find out the geographical distribution characteristics of negative accumulated temperature. Based on the daily mean air temperature of 48 meteorological stations in Liaoning Province from 1961 to 1990, the negative accumulated temperatures for all the stations and the geographical distribution characteristics were statistically calculated and analyzed. The multi-year calculation models of accumulated temperature average using latitude, longitude and altitude by means of the small grid method were developed, and the digital pictures of negative accumulated temperature can be drawn on the ARCGIS platform to improve the analysis precision.
出处
《气象科技》
2005年第4期360-362,共3页
Meteorological Science and Technology
基金
中国气象局"全国第三次农业气候区划"项目资助
