气压对银川基准台重力观测的影响
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摘要
分析研究了银川基准台重力非潮汐变化与气压的相关性,结果表明重力非潮汐变化与气压存在较好的负相关。利用两者间高度相关性,对重力潮汐变化、非潮汐变化进行了气压改正,改正前后重力潮汐参数的精度没有显著变化,非潮汐变化漂移稳定,为捕捉地震前兆异常提供了有力的帮助。
The analysis and study have been done on the correlatability between gravity non-tide change and air pressure,the results show that there is relatively good negative correlation between them.By using the high correlation between them, the air pressure correction has been done on the gravity tide and non-tide changes.Before and after the correction,there aren't obvious changes in the precision of the gravity tide parameters,but the drift of non-tide change is steady.This may help to catch the precursory anomalies before earthquakes.
The analysis and study have been done on the correlatability between gravity non-tide change and air pressure,the results show that there is relatively good negative correlation between them.By using the high correlation between them, the air pressure correction has been done on the gravity tide and non-tide changes.Before and after the correction,there aren't obvious changes in the precision of the gravity tide parameters,but the drift of non-tide change is steady.This may help to catch the precursory anomalies before earthquakes.
引文
[1]徐建桥,郝兴华,孙和平.武汉基准台气压对重力潮汐观测的影响[J].测绘学报,1999,28(1):21~27.
[2]徐建桥,等.气压和气温对南极中山站重力场观测的影响研究[J].地球物理学报,2002,45(增刊):106~114.
[3]吴立辛,等.洞温对银川台重力观测的影响研究[J].大地测量与地球动力学,2005,25(3):105~109.
[4]Niebauer T.M.Correcting Gravity Measurements for theEffects of Local Air Pressure[J].J.Geophys.Res.,1988,93(B7):7 989~7 991.
[5]北京大学地球物理系.重力与固体潮教程[M].北京:地震出版社,1982.166~167.
[2]徐建桥,等.气压和气温对南极中山站重力场观测的影响研究[J].地球物理学报,2002,45(增刊):106~114.
[3]吴立辛,等.洞温对银川台重力观测的影响研究[J].大地测量与地球动力学,2005,25(3):105~109.
[4]Niebauer T.M.Correcting Gravity Measurements for theEffects of Local Air Pressure[J].J.Geophys.Res.,1988,93(B7):7 989~7 991.
[5]北京大学地球物理系.重力与固体潮教程[M].北京:地震出版社,1982.166~167.
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