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北冰洋海冰厚度穿透雷达探测与下表面形态特征分析 总被引:10,自引:2,他引:10
通过对北冰洋海冰穿透雷达的探测与分析, 讨论了雷达电磁波探测海冰厚度和海冰下表面形态特征的能力. 结果表明, 雷达波可穿透超过6 m厚度的北极盛夏海冰, 雷达波在海冰内的传播速度是0.142~0.154 m/ns. 雷达图像表现出海冰下表面粗糙起伏的微形态特征, 这种微形态特征与海冰类型关系紧密, 反映出雷达探测有助于识别和划分海冰类型. 基于雷达图像同时显示海冰上、下界线的特点, 统计分析了二者界线实际长度的差异, 提出一个新的长度因子数值概念, 可用于海冰上、下表面面积差异的研究. 相似文献
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Sea ice thickness measurement and its underside morphology analysis using radar penetration in the Arctic Ocean 总被引:5,自引:0,他引:5
Sea ice, as an important component of the Arctic climate system, has drawn significant sci-entific interest. Sea ice thickness and its morphology have dramatic impacts on ocean-atmos- phere-ice interactions[1—4], which directly affect the exchange proces… 相似文献
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1 IntroductionSeaice ,asanimportantcomponentoftheArcticclimatesystem ,hasdrawnsignifi cantscientificinterest.Seaicethicknessanditsmorphologyhavedramaticimpactsono cean atmosphere iceinteractions(Wadhams 1 994;Barryetal.1 993 ;Dickson 1 999;PadhamsandNorman 2 0 0 0 ) ,whichdirectlyaffecttheexchangeprocessandspeedofheatandmassbetweentheoceanandtheatmosphere ,dominatethephysicalmechanicsfea turesofseaice ,andaffecttheseaicemovement&deformationaswellasicefreezing&meltingprocess(Hollandetal.1 99… 相似文献
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