Estimation of Sea Ice Thickness at Zhongshan Station in Antarctica Based on a Combination of GPS and Tide Observations
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摘要: 基于力学平衡原理提出了一种联合验潮与GPS测量极区海冰厚度的新方法 由海冰上的GPS观测可得到海冰上表面高验潮可提供海水面高联合两种观测数据可计算得到海冰干弦高度再结合海冰表面积雪厚度与冰雪密度数据由力学平衡原理可构建海冰厚度的计算模型 根据这一原理通过中国第28次南极科考队在中山站附近海冰上的实验监测到了2012年9月22日至11月9日的海冰厚度变化 与钻孔实测冰厚相比其总体精度达到了cm级最大差异为8．9cm差异的均方根为5．4cm.Abstract: Due to the tidal effectsea ice in Polar Regions moves verticall y alon g with the sea level．The elevation of the sea ices upper surface can be detected by a GPS receiverand sea level can be measured by tide observations．Thereuponif we can provide the thickness of the snow cover over the sea iceand the densities of snow and sea icethenaccording to the princi ple of hydrostatic balance thickness of the sea ice can be derived by a combination of the GPS and tide observations．The experiment conducted by the 28th Chinese National Antarctic Expedition at Zhongshan Station in Antarctica during September 222012to November 9indicates that the sea ice thickness can be estimated in centimeterlevel accurac y by this app roach．Compares to the measurements made by drillin g holesthe maximum difference is 8．9centimetersthe root mean square of the different values is 5．4centimeters．
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Keywords:
- GPS /
- tide oservation /
- freeboard hei ght /
- sea inessant /
- arctica
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