【摘要】 雪的微波散射特性与液态水存在着密切的联系,由于融化导致的液态水成分增大将导致雪层后向散射大大降低。利用南极地区同季相SAAS(1978)和NSCAT(1996)Ku波段散射计数据进行差分处理,得出后向散射发生显著变化的地区。以EllsworthLand为例,结合自动气象站历史数据记录,得出该地区后向散射减弱部分源于气温升高融化加剧的结论。更多还原

【Abstract】 The backscattering characteristic of firn layer in Antarctica has tight relevance to liquid water content. The increasing of liquid water content caused by melting will reduce the backscattering greatly. Using the Ku band scatterometer data from SAAS(1978) and NSCAT(1996) for differential analysis, the regions showing remarkable fluctuations are given. Focusing on Ellsworth Land, the historic weather record is combined for analysis. It is concluded that the reduction of backscattering is partly out of the increasing temperature or melting.更多还原