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首页> 外文期刊>Cold regions science and technology >A probabilistic description of pressure ridge width, spacing, and keel depth for the Chukchi and Beaufort seas based on IPS and ADCP observations
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A probabilistic description of pressure ridge width, spacing, and keel depth for the Chukchi and Beaufort seas based on IPS and ADCP observations

机译：基于IPS和ADCP观测的Chukchi和Beaufort Sea的压力脊宽，间距和龙骨深度的概率描述

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摘要

16 seasons of under-ice measurements, from both the Beaufort and Chukchi seas, were processed and pressure ridge keel features were identified. A starting threshold value of 6m was justified by statistical goodness-of-fit results and used to identify keels from the under-ice measurements. Statistics for keel depth, keel width, keel slope, and keel spacing were determined and compared to other sources. It was shown that the Exponential, Gamma and Weibull Distributions all fit depth data well; with the three-parameter Weibull Distribution being the better fit. Keel width and slope were studied by comparing the most common modal keel width, for each 1m increment of keel depth, and comparing the results to other sources. A presumed keel slope, for an idelaized triangular keel, of 33.7 degrees for the Western Beaufort and 32.5 degrees for the Chukchi seas did not compare well with field measurements from some sources but did compare favorably with published results from models of ridge formation. The disparity could have significant implications when designing offshore structures in ice-covered waters. The best fit found for keel spacing was the Lognormal Distribution, which is consistent with other studies. Parameters for the distributions considered in the paper are provided along with rudimentary statistics for the parameters studied.
机译：从Beaufort和Chukchi Sea中获得了16个冰块的次数，被处理，并确定了压力脊髓特征。通过统计良好的拟合结果，6M的起始阈值是合理的，并且用于识别来自冰次尺度的龙骨。确定龙骨深度，龙骨宽度，龙骨斜率和龙骨间距的统计数据，并与其他来源进行比较。结果表明，指数，伽马和威布尔分布都适合深度数据;三参数威布尔分布符合更好的合适。通过比较最常见的模态龙骨宽度，为龙骨深度的每个1M增量进行比较，并将结果与​​其他来源进行比较来研究龙骨宽度和斜坡。对于西博的近距离龙骨的推定龙骨斜坡为33.7度，为Chukchi海域的32.5度没有比较一些来源的现场测量，但是与脊形成模型的发布结果有利地比较。在设计冰覆盖的水域时，差异可能会产生重大影响。为龙骨间隔找到的最佳拟合是逻辑正式分布，与其他研究一致。本文考虑的分布的参数随着所研究参数的基本统计提供。

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