积雪、土壤冻融与土壤水分遥感监测研究进展

Progress on Remote Sensing of Snow,Surface Soil Frozen/Thaw State and Soil Moisture

积雪、土壤冻融与土壤水分是陆表能量与水分以及碳交换过程研究中的重要因子,为了更好地了解积雪覆盖、雪深/雪水当量、土壤冻融状态和土壤水分等参数的遥感监测领域的发展动态,对这些参数遥感监测方法的研究进展进行了梳理,总结了利用光学与微波遥感,以及多源遥感融合的监测方法,并对该研究领域的发展趋势进行了展望。积雪、土壤冻融与土壤水分的遥感监测能力不断提升,监测算法从单一传感器向多传感器、单波段单一模式向多波段多模式集成,以及卫星虚拟星座综合观测概念的提出,均促进了现有卫星观测地表参数能力的提升;长时间序列产品的开发,对于研究和掌握全球变化大背景下对气候的响应提供了很好的数据基础;同时有助于促进遥感在水文、气象、气候、生态等领域的应用。以上的研究综述,有望对陆表水循环遥感参数反演领域,以及水循环遥感关键参数的应用领域有一定的借鉴作用。

Snow cover,snow depth/snow water equivalent,surface soil frozen/thaw state and soil moisture are the key variables in the three cycles including energy,water and carbon cycles.In order to better understand the remote sensing techniques of above parameters,this paper presents a comprehensive review of the progress in remote sensing of snow,soil frozen/thaw state and soil moisture,including the methods and theories of snow cover,snow depth/snow water equivalent,surface soil frozen/thaw and soil moisture remote sensing monitoring from visible,microwave techniques and the integration of multi-sources of remote sensing.The research progress of these parameters is summarized,and the prospects of these parameters are also discussed.The capability of snow,surface soil frozen/thaw state and soil moisture with remote sensing has been demonstrated to be improved greatly due to the retrieval algorithms development based on from single-sensor to multi-sensor combination,single-band to multi-band integration,especially on the virtual satellites constellation.Long time series data set of these surface parameters about 40~50 years were generated,then these products provide our better understanding on surface response to global climate change,and accelerating the application into the research of hydrology,climate and carbon cycles.This review will be helpful for the application of key parameters retrieval in water cycle with remote sensing.