Worldwide Synthetic Gravity Tide Parameters

Worldwide Synthetic Gravity Tide Parameters
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全球合成重力潮参数

DOI:
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发表时间:
1995
期刊:
影响因子:
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通讯作者:
H. Wenzel
H. Wenzel
中科院分区:
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文献类型:
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作者:
L. Timmen;H. Wenzel

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在全球1° x 1°网格中,在主要位于陆地上的26995个网格点处,计算了MF、Q1、O 1、P1、K1、N2、M2、S2和K2波的合成重力潮汐参数(振幅因子和相位超前)。重力潮汐参数是根据Tamura(1987)潮汐位的重力潮汐振幅(参考刚性地球模型)和体潮振幅因子(使用无海洋、弹性、旋转、各向同性和椭球体的具有液体外核的地球模型)导出的(Wahr 1981,Dehant 1987),以及使用1° x 1°海洋潮汐模型(Schwiderski 1980)的海洋潮汐引力和载荷。从国际地球潮汐中心DB 92数据库(Melchior 1994)中选取了31个欧洲重力潮汐站,对合成重力潮汐参数进行了比较,结果表明,主波01和M2的振幅因子的均方根差分别为0.79%和0.87%,相位超前分别为0.24°和0.48°。
Synthetic gravity tide parameters (amplitude factors and phase leads) have been computed for the waves MF, Q1, O1, P1, K1, N2, M2, S2 and K2 in a worldwide 1° x 1° grid at 26995 grid points located mainly on land. The gravity tide parameters have been derived from gravity tide amplitudes of the Tamura (1987) tidal potential referring to a rigid Earth model, body tide amplitude factors using a model of an ocean-free, elastic, rotating, isotropic and ellipsoidal Earth with liquid outer core (Wahr 1981, Dehant 1987), and from ocean tide gravitation and load using a 1° x 1° ocean tide model (Schwiderski 1980). The synthetic gravity tide parameters have been compared at 31 European gravity tide stations selected from the data base DB92 of the International Center for Earth Tides (Melchior 1994) and show rms differences of 0.79% and 0.87% for the amplitude factors and 0.24° and 0.48° for the phase leads of the main waves 01 and M2 resp.