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The Sensitivity of Ice Keel Statistics to Upward Looking Sonar Ice Draft Processing Methods

机译：冰块统计的敏感性向上看声卡冰料加工方法

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Upward looking sonar (ULS) instruments have been used for several decades to provide continuous measurements of ice draft. The time resolution of the ice draft observations is typically 1-2 seconds. When fused with ice drift speed observations, a high horizontal spatial resolution can be realized. Such a high resolution allows for the identification of individual ice keel features and an analysis of their spatial characteristics. Many methods are available for transforming the ice draft series from an equispaced time domain to an equidistant spatial domain. This paper analyzed the sensitivity of ice keel statistics to three transformation methods applied to ULS sea ice measurements in the Beaufort Sea and North Chukchi Sea. Although differences were found between the methods, these were related to episodes when the sampling frequency is not high enough to profile an ice draft feature travelling with a high drift speed. Knowledge of maximum drift speeds in the region of a measurement location along with the enhanced power and storage capacities of modern ice profilers enable sampling configurations which avoid this scenario.
机译：向上看声纳（ULS）仪器已被使用数十年来提供冰水稿的持续测量。冰草案观察的时间分辨率通常为1-2秒。当与冰漂移速度观测融合时，可以实现高水平空间分辨率。这种高分辨率允许识别单独的冰龙骨特征和对其空间特征的分析。可以从等级时域转换到等距空间域的许多方法。本文分析了冰基统计到三种转化方法应用于ULS海冰测量的三种转化方法。尽管在这些方法之间发现了差异，但是当采样频率不足以推动具有高漂移速度的冰流动特征时，这些与剧集有关。测量位置区域中的最大漂移速度的知识以及现代冰轮廓仪的增强电源和存储能力，使得采样配置避免这种情况。

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