摘要
根据沙尘暴起沙、传输与降沉模型系统对参数的需求 ,中日亚洲沙尘暴项目在源区、传输区和降沉区布设了先进的仪器设备 ,其中沙尘干量TSP数据是主要获取的数据 ,同时利用气象卫星获取沙尘过程的云图和反演沙尘过程的地表物理参数。由于不同土地利用 /覆盖对沙尘暴过程中起沙的贡献不一样 ,研究中用局地分裂窗算法反演NOAA/AVHRR热红外波段数据的地面温度参数 ;取得大范围的时序地面温度数据后参照 1∶10万土地利用 /覆盖类型重采样图层选点提取地表温度 ,形成不同点时间序列变化曲线 ;最后将不同地类的地表温度时序变化曲线与观测点沙尘干量 TSP 时序变化曲线对比分析 ,发现两者具有较好的对应关系 ,说明沙尘暴过程地表温度变化现象与沙尘有密切的关系。结果表明 ,利用遥感数据反演地面温度参数可以作为沙尘预报模型的重要参数。
Based on the modelling system of emission?transport and deposition of the Asian dust storm, Many advanced apparatus and equipments have been furnished by Chinese-Japanese dust storm project in the area of emission,transport and deposition of Asian dust storm. The TSP data is one of the important data obtained. And using meteorological satellite, the cloud graph of the course of dust storm is obtained and the physical parameters of the land surface are retrieved. Because the contributions of different land use/cover are different to emission of dust storm, based on the land use/cover map in the scale of 1∶100 000, the land surface temperature(LST) is retrieved by the local split-window method. At last, the change curves arranged by time order are formed. Comparing these curves to TSP curves, the results show that they have good correspondent relationship. It can be concluded that there is an affinity between theLST and the dust storm. It is manifestated that the LST parameter retrieved by RS data may become one of the important parameters of the dust storm predict model.
出处
《干旱区地理》
CSCD
北大核心
2003年第1期89-96,共8页
Arid Land Geography
基金
亚洲沙尘暴机理研究项目 (kzcx2 0 30 5 )
数字地球基础理论研究 (kzcsx2 -312 )
