Use of side-looking airborne radar to determine lake depth on the Alaskan North Slope
Use of side-looking airborne radar to determine lake depth on the Alaskan North Slope
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使用侧视机载雷达确定阿拉斯加北坡的湖泊深度
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
W. Campbell
中科院分区：
文献类型：
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作者：
P. Sellmann;W. Weeks;W. Campbell
摘要：1974年4月至5月，从巴罗和哈里森湾之间的阿拉斯加北坡获得的侧视机载雷达（SLAR）图像表明，根据雷达回波的强度，苔原湖泊可以分为两类。返回的面积模式，有限的地面观测湖深，并从Erts图像获得的信息之间的相关性强烈表明，淡水湖给予弱回报完全冻结到底部，而湖泊给予强回报没有。咸水湖即使没有完全结冰，回报也很低。这大概是由于冰盖下部的盐水限制了X波段辐射穿透冰层的结果。虽然在雷达后向散射的差异的物理原因尚未确定，几种可能性进行了讨论。通过SLAR将苔原湖泊快速而容易地分为这两类的能力在各种不同的问题中应该是有用的。
Abstract : Side-looking airborne radar (SLAR) imagery obtained in April-May 1974 from the North Slope of Alaska between Barrow and Harrison Bay indicates that tundra lakes can be separated into two classes based on the strength of the radar returns. Correlations between the areal patterns of the returns, limited ground observations on lake depths, and information obtained from ERTS imagery strongly suggest that freshwater lakes giving weak returns are frozen completely to the bottom while lakes giving strong returns are not. Brackish lakes also give weak returns even when they are not completely frozen. This is presumably the result of the brine present in the lower portion of the ice cover limiting the penetration of the X-band radiation into the ice. Although the physical cause of the differences in radar backscatter has not been identified, several possibilities are discussed. The ability to rapidly and easily separate the tundra lakes into these two classes via SLAR should be useful in a wide variety of different problems.