A model for retrieving total sea ice concentration from a spaceborne dual-polarized passive microwave instrument operating near 90 GHz
A model for retrieving total sea ice concentration from a spaceborne dual-polarized passive microwave instrument operating near 90 GHz
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DOI：
10.1080/01431168708954790
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发表时间：
1987-10
影响因子：
3.4
通讯作者：
E. Svendsen;C. Mätzler;T. Grenfell
中科院分区：
文献类型：
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作者：
E. Svendsen;C. Mätzler;T. Grenfell
摘要提出了一种利用星载高频无源微波测量技术估算总冰浓度的算法。该算法的目的是使用未来的特殊传感器微波/成像仪（SSM/I）的数据，空间分辨率为12公里。它以辐射物理学和详细的毫米波表面特征测量为基础，因此可适用于其他类似数据。然而，由于时变的大气条件和冰的辐射特性对信号影响很大，因此该算法具有自调整性。大气层的影响被隐含地视为冰浓度的平滑函数，连接点位于公海上方，每个轨道都有100%的冰。这意味着主要的误差是由于大块的厚云和具有非典型辐射特性的浮冰。误差分析表明，北极盆地代表性浓度的可能误差为5%，随着浓度的降低而增加。
Abstract An algorithm has been developed for estimating total ice concentration from spaceborne high-frequency passive microwave instrumentation. The algorithm is intended for use with the coming Special Sensor Microwave/Imager (SSM/I) data giving a spatial resolution of 12 km. It is based on radiation physics and detailed millimetre wave surface signature measurements and can therefore be applied to other similar data. However, due to large effects on the signals caused by time varying atmospheric conditions and radiation properties of the ice, the algorithm is made self-adjusting. The atmospheric effects are implicitly treated as a smooth function of the ice concentration with tie points over open ocean and 100 per cent ice for each orbit. This means that the main errors are due to patches of heavy clouds and ice floes with atypical radiation properties. An error analysis indicates possible errors of the order of 5 percent for concentrations representative for the Arctic Basin, increasing with decreasin...