摘要
本文简要叙述了利用气象卫星资料进行积雪监测的可行性和复杂性;以改进的甚高分辨率扫描辐射仪(AVHRR)资料为例综述了遥感监测积雪的原理、方法和资料处理过程;分析了计算结果,并探讨了未来积雪监测的发展。
Snow cover is an important resource of the earth. It is very useful for climate research, agriculture and water resources management to investigate and monitor the distribution of snow cover in a large area and river basins using remote sensing technology.In this paper, we discussed the feasibility and complexity of snow cover dynamic monitoring using meteorological satellite data, and described the theory, method and the data processing procedure of snow cover monitoring using the Advanced Very High Resolution Radiometer (AVHRR) data.We used two methods for snow cover monitoring, one is weekly (or ten days) data compositing and threshold testing for large area snow cover detection in order to reduce the effects of cloud and other atmospheric contamination, the other is an algorithm to used cloud-free data over local area of river basins. According to these, we have done a lot of the testing research work over China and several local areas such as Anyemaqen Shan area in the upper reaches of the yellow river. We found that AVHRR/HRPT data is very useful to do snow cover monitoring and to calculate the extent of snow cover. Although it can not be used to measure the snow depth directly, it can be used to estimate the snow cover area and the percent of snow cover. And also it can be used to monitor the changes of snow cover. Finally, we summarized the analysis of the results and snow cover monitoring in the future.
出处
《环境遥感》
CSCD
1992年第1期24-31,T001,共9页
基金
国家气象局气象科学基金
关键词
积雪
监测
气象卫星
Satellite remote sensing Snow cover monitoring AVHRR data
