The impact of early summer snow properties on land-fast sea-ice X-band backscatter
The impact of early summer snow properties on land-fast sea-ice X-band backscatter
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初夏积雪特性对陆地快速海冰 X 波段反向散射的影响
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
G. Heinemann
中科院分区：
文献类型：
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作者：
S. Paul;S. Willmes;M. Hoppmann;P. Hunkeler;G. Heinemann
海冰上的积雪及其对雷达后向散射的影响，特别是在冻融过程开始之后，需要更多的了解。我们提出了一个数据集，包括现场测量的雪的属性，从南极洲的阿特卡湾的陆地固定海冰，结合高分辨率TerraSAR-X后向散射数据。这两个数据集讨论了从南方冬季到夏季的过渡期（2012年11月至2013年1月）。季节性积雪的变化反映在TerraSAR-X后向散射的演变中。我们能够解释之间的62%和80%的TerraSAR-X后向散射信号的时空变化与多达三个积雪参数，通过使用一个简单的线性模型。特别是在融化过程开始后，大多数的TerraSAR-X后向散射变化的影响，积雪深度，雪/冰界面温度和积雪颗粒大小，从而意味着潜在的也检索雪的物理特性从X波段后向散射。
Snow cover on sea ice and its impact on radar backscatter, particularly after the onset of freeze-thaw processes requires increased understanding. We present a data set that comprises in-situ measured snow properties from the land-fast sea ice of the Atka Bay, Antarctica, in combination with high-resolution TerraSAR-X backscatter data. Both data sets are discussed for the transition period from austral winter to summer (November 2012 - January 2013). The changes in the seasonal snow cover are reflected in the evolution of TerraSAR-X backscatter. We are able to explain between 62 % and 80 % of the spatio-temporal variations of the TerraSAR-X backscatter signal with up to three snow-pack parameters by using a simple linear model. Especially after the onset of melt processes, the majority of the TerraSAR-X backscatter variations are influenced by snow depth, snow/ice-interface temperature and snow-pack grain size and thereby imply the potential to also retrieve snow physical properties from X-Band backscatter.