利用重力波图像提取边缘冰带厚度

Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium Pub Date : 1993-08-18 DOI:10.1109/IGARSS.1993.322311

R. Shuchman, C.L. Rufenach, O. Johannessen

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引用次数: 0

摘要

1987年，利用格陵兰海上空飞行的飞机获得了Fram海峡边缘冰带(MIZ)的合成孔径雷达(SAR)重力波图像。在三个不同的区域，主要的重力波长随穿透距离的增加呈现出系统的延长。提取的优势波长采用线性最小二乘拟合与穿透距离和弯曲-重力波模型进行分析，以估计平均冰厚。提取的平均厚度从冰缘附近的约1/spl plusmn/0.4 m到波的最深可探测穿透点(约20 km)附近的约2/spl plusmn/0.4 m不等。这些厚度与在SAR测量后两周内在Fram海峡MIZ进行的31次原位测量结果一致。

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The extraction of marginal-ice-zone thickness using gravity wave imagery

Synthetic aperture radar (SAR) imagery of gravity waves in the Fram Strait marginal ice zone (MIZ) were acquired during 1987 using aircraft flying over the Greenland Sea. The dominant gravity wavelengths exhibit a systematic lengthening with penetration distance into the MIZ for three different regions examined. The extracted dominant wavelengths were analyzed using a linear least square fit with penetration distance and a flexure-gravity wave model to estimate mean ice thickness. The extracted mean thickness varies from about 1/spl plusmn/0.4 m near the ice edge to approximately 2/spl plusmn/0.4 m near the deepest detectable penetration of the waves, about 20 km. These thicknesses are in agreement with 31 in-situ measurements taken in the Fram Strait MIZ within two weeks of the SAR measurements.<>

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Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium

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