THE APPLICATION OF THE 3D GPR METHOD TO MEASURING THE DEPTH OF ARCTIC SUMMER SEA ICE AND ANALYZING ITS UNDERSIDE MORPHOLOGY
WANG Bang-bing1, SUN Bo2, TIAN Gang3, GUO Jing-xue1, WANG Da-li2
1. Department of Geophysics, Jilin University, Changchun 130026, China;
2. Polar Research Institute of China, ShangHai 200129, China;
3. Department of Earth Science, ZheJiang University, Hangzhou 310027, China
Sea ice plays an important role in the global climate system. The authors combined 3D GPR with drilling during China's second national Arctic research expedition. The interface of ice and sea water can be recognized clearly from the GPR section, consistent with the drilling result. 3D GPR Cube illustrates distinctly the underside morphology and the spatial spreading of inner structure of the Arctic sea ice. After additional calculation, some parameters, such as the upper and bottom surface areas and the volume of sea-ice, can be figured out and then serve as on-the-spot checkout data for the remote sensing and the data simulator. These data also provide the evidence and proof for the study of the formation mechanism and the course of dynamic effect of the sea ice.
王帮兵, 孙波, 田钢, 郭井学, 汪大立. 利用三维GPR探测 北极夏季海冰厚度及下表面形态特征分析[J]. 物探与化探, 2007, 31(3): 189-192.
WANG Bang-bing, SUN Bo, TIAN Gang, GUO Jing-xue, WANG Da-li. THE APPLICATION OF THE 3D GPR METHOD TO MEASURING THE DEPTH OF ARCTIC SUMMER SEA ICE AND ANALYZING ITS UNDERSIDE MORPHOLOGY. Geophysical and Geochemical Exploration, 2007, 31(3): 189-192.
[1] Barry R G,Serreze M C,Maslanik J A,et al.The Arctic sea ice-climate system:observations and modeling[J].Rev Geophys,1993, 31(4):397.
[2] Dickson B.All change in the Arctic[J].Nature,1999:397,389.
[3] Comiso J C.A rapidly declining perennial sea ice covers in the Arctic[J].Geophys Res Lett,2002,29(17):1.
[4] Rigor I G,Wallace J M,Colony RL.Response of sea ice to the Arctic Oscillation[J].J Clim,2002,15:2648.
[5] Rothrock D A,Zhang J.What explains its recent depletion[J].J Geophys Res,2005,110(C01002):1.
[6] Kerr R A.Will the Arctic Ocean lose all its ice[J].Science,1999,286:1828.
[7] Hilmer M,Lemke P.On the Decrease of Arctic sea ice volume[J].Geophys Res Lett,2000, 27(22):3751.
[8] Holloway G,Sou T.Has Arctic sea ice rapidly thinned[J].J Clim, 2002,15:1691.
[9] Hudson R.Annual Measurement of sea-ice thickness using an upward-looking sonar[J].Nature,1990,344:135.
[10] Wadhams P.The underside of Arctic sea ice image by sidescan sonar[J].Nature,1988,333:161.
[11] Haas C,Gerland S,Eicken H,et al.Comparison of sea ice thickness measurements under summer and winter conditions in the Arctic using a small electromagnetic induction device[J].Geophysics,1997,62:749.
[12] Haas C,Eicken H.Interannual variability of summer sea ice thickness in the Siberian and Central Arctic under different atmospheric circulation regimes[J].J Geophys Res,2001,106(C3):4449.
[13] James E R,WorbyzA P,Vrbancich J,et al.Shipborne electromagnetic measurements of Antarctic sea-ice thickness[J].Geophysics,2003,68(5):1537.
[14] Kovacs A,Morey R M.Sea ice thickness versus impulse radar time-of-flight data.Cold Reg Sci Technol,1990,18(1):91.
[15] Morey R M,Kovacs A,Cox G F N.Electromagnetic properties of sea ice.Cold Regions Science and Technology,1984(9):53.
[16] Sun B, Jia J H,He M B,et al.Sea-ice thickness measurement and its underside morphology analysis using radar penetration in the Arctic Ocean[J].Sci China (D),2003,46(11):1151.