利用测高重力异常建立南中国海海底地形模型
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摘要
论述了频率域内海深反演的基本原理,简要分析海底地形和海洋重力异常的函数关系。基于未补偿板块响应函数模型,利用测高重力异常和ETOPO1海深模型对南中国海海底地形进行反演,经ETOPO1模型和实测水深检核,反演出的海深模型相对精度在10%左右。该技术不需要船测数据作为控制,需要先验的海深模型作为参考,在浅海以及多海山地区精度较差,并存在过低估计海山峰值的问题。
This article discusses the basic principle of bathymetry inversion in frequency domains.,In addition,the response function relationship between the bathymetry and gravity anomaly is analyzed briefly.Based on the uncompensated plate model,the bathymetry in South China Sea is predicted from satellite altimetry-derived gravity anomaly and the ETOPO1 model.The precision of the predicted bathymetry model is about 10% using the ETOPO1 model and ship-derived bathymetry data.The advantage of this technique is that there is no need to use the ship borne bathymetry data as control points,and the disadvantage is that it requires a prior bathymetry model as a reference.Furthermore,in shallow sea and seamount areas,the precision is a bit lower,and the seamount peak is underestimated excessively.
This article discusses the basic principle of bathymetry inversion in frequency domains.,In addition,the response function relationship between the bathymetry and gravity anomaly is analyzed briefly.Based on the uncompensated plate model,the bathymetry in South China Sea is predicted from satellite altimetry-derived gravity anomaly and the ETOPO1 model.The precision of the predicted bathymetry model is about 10% using the ETOPO1 model and ship-derived bathymetry data.The advantage of this technique is that there is no need to use the ship borne bathymetry data as control points,and the disadvantage is that it requires a prior bathymetry model as a reference.Furthermore,in shallow sea and seamount areas,the precision is a bit lower,and the seamount peak is underestimated excessively.
引文
[1]黄谟涛,翟国君,管峥,等.海洋重力场测定及其应用[M].北京:测绘出版社,2005(Huang Motao,Zhai Guojun,Guan Zheng,et al.The Marine Gravity Field Determination and Its Application[M].Beijing:Surveying and Mapping Press,2005)
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[3]Neumann G A,Forsyth D W,Sandwell D.Comparison of Marine Gravity from Shipboard and High-density Satellite Altimetry Along the Mid-Atlantic Ridge[J].J Geophys Res,1993,20:1 639-1 642
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[7]罗佳.由测高数据和海洋重力资料联合反演海底地形[D].武汉:武汉大学,2000(Luo Jia.Bathymetry Inversion Combining Satellite Altimetry and Marine Gravity Data[D].Wuhan:Wuhan University,2000
[8]聂琳娟,吴云孙,金涛勇,等.基于海水质量亏损引起的重力异常反演南海海底地形[J].大地测量与地球动力学,2012,32(1):43-46(Nie Linjuan,Wu Yunsun,Jin Taoyong,et al.Inversion of Submarine Topography of South China Sea by Using Gravity Anomaly Caused by Mass Deficiency[J].Journal of Geodesy and Geodynamics,2012,32(1):43-46)
[9]Watts A B,Sandwell D T,Smith W H F,et al.Global Gravity,Bathymetry,and the Distribution of Submarine Volcanism Through Space and Time[J].J Geophys Res,2006,111:B08408
[10]Tscherning C C,Knudsen P,Foesberg R.First Experiments with Improvement of Depth Information Using Gravity Anomalies in the Mwditerranean Sea[R].University of Thessaloniki,1994
[11]Zhai Guojun,Huang Motao,Ouyang Yongzhong,et al.A Modified Method for Recovering Bathymetry from Altimeter Data[J].International Association of Geodesy Symposia,2003,126:84-88
[12]Amante C,Eakins B W.ETOPO1 1Arc-minute Global Relief Model:Procedures,Data Sources and Analysis[R].NOAA Technical Memorandum,2009
[13]Baltazar O,Knudsen A P.The DNSC08GRA Global Marine Gravity Field from Double Retracked Satellite Altimetry[J].Journal of Geodesy,2010,84:191-199
[14]Parker R L.The Rapid Calculation of Potential Anonmalies[J].J Geophys Res,1972,31:447-455
[15]Watts A B.An Analysis of Isostasy in the World’s Oceans:1 Hawaiian Emperor Seament Chain[J].J Geophys Res,1978,83:5 989-6 004
[16]Watts A B.Isostasy and Flexure of the Lithosphere[M].New York:Cambridge University Press,2001
[2]王勇,许厚泽,詹金刚.中国海及其邻近海域高分辨率海底地形[J].科学通报,2001,46(11):956-960(Wang Yong,Xu Houze,Zhan Jingang.High Resolution Sea Floor Topography of China Sea and Its Adjacent Areas[J].Chinese Science Bulletin,2001,46(11):956-960)
[3]Neumann G A,Forsyth D W,Sandwell D.Comparison of Marine Gravity from Shipboard and High-density Satellite Altimetry Along the Mid-Atlantic Ridge[J].J Geophys Res,1993,20:1 639-1 642
[4]黄谟涛,翟国君.利用卫星测高资料反演海底地形研究[J].武汉大学学报:信息科学版,2002,27(2):133-137(Huang Motao,Zhai Guojun.The Recovery of Bathymetry from Altimeter Data[J].Geomatics and Information Science of Wuhan University,2002,27(2):133-137)
[5]李大炜,李建成,丰海,等.利用卫星测高数据反演中国海及邻近海域海底地形[J].大地测量与地球动力学,2009,29(4):70-73(Li Dawei,Li Jiancheng,Feng Hai,et al.Research on Inversion of Seafloor Topography of China Sea and Its Adjacent Areas from Satellite Altimetric Data[J].Journal of Geodesy and Geodynamics,2009,29(4):70-73)
[6]方剑,张赤军.中国海及邻近海域2′×2′海底地形[J].武汉大学学报:信息科学版,2003,28(1):38-40(Fang Jian,Zhang Chijun.2′×2′Sea Floor Bathymetry Prediction of China Sea and Its Vicinity[J].Geomatics and Information Science of Wuhan University,2003,28(1):38-40
[7]罗佳.由测高数据和海洋重力资料联合反演海底地形[D].武汉:武汉大学,2000(Luo Jia.Bathymetry Inversion Combining Satellite Altimetry and Marine Gravity Data[D].Wuhan:Wuhan University,2000
[8]聂琳娟,吴云孙,金涛勇,等.基于海水质量亏损引起的重力异常反演南海海底地形[J].大地测量与地球动力学,2012,32(1):43-46(Nie Linjuan,Wu Yunsun,Jin Taoyong,et al.Inversion of Submarine Topography of South China Sea by Using Gravity Anomaly Caused by Mass Deficiency[J].Journal of Geodesy and Geodynamics,2012,32(1):43-46)
[9]Watts A B,Sandwell D T,Smith W H F,et al.Global Gravity,Bathymetry,and the Distribution of Submarine Volcanism Through Space and Time[J].J Geophys Res,2006,111:B08408
[10]Tscherning C C,Knudsen P,Foesberg R.First Experiments with Improvement of Depth Information Using Gravity Anomalies in the Mwditerranean Sea[R].University of Thessaloniki,1994
[11]Zhai Guojun,Huang Motao,Ouyang Yongzhong,et al.A Modified Method for Recovering Bathymetry from Altimeter Data[J].International Association of Geodesy Symposia,2003,126:84-88
[12]Amante C,Eakins B W.ETOPO1 1Arc-minute Global Relief Model:Procedures,Data Sources and Analysis[R].NOAA Technical Memorandum,2009
[13]Baltazar O,Knudsen A P.The DNSC08GRA Global Marine Gravity Field from Double Retracked Satellite Altimetry[J].Journal of Geodesy,2010,84:191-199
[14]Parker R L.The Rapid Calculation of Potential Anonmalies[J].J Geophys Res,1972,31:447-455
[15]Watts A B.An Analysis of Isostasy in the World’s Oceans:1 Hawaiian Emperor Seament Chain[J].J Geophys Res,1978,83:5 989-6 004
[16]Watts A B.Isostasy and Flexure of the Lithosphere[M].New York:Cambridge University Press,2001