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大气质量对地壳加载并使之形变.通过将逐日的全球气压数据和质量负载的格林函数进行摺积求和,我们怡算大气负载(包括那些与短期大气扰动有关的大气负载)对地表刚点定位测量和地表重力观测的时间依赖关系.我们茸出了无海洋地球和具有一负压海洋(inverted barometer ocean)的地球的响应.负压海洋显著地影响近海岸台站的负载响应.峰峰垂直位移常常是15一20mm,伴随有3一6卜Gal的扰动.基线变化可能大到20mm或更大.这种扰动在高纬度区和冬季达到最大.这些振幅的变化与Rabbel和Zs。hau(1985)的结果一致.他们用距某一点半径有关的高斯函数模拟了气压扰动.使用台距约I00okm以内测点的现有气压数据就足以计算地壳的形变.单是局部气压数据是不够的.Rabbel和Zsc五-au为使用局部气压和区域平均气压算得的这些位移位所假设的改正值,对正好在内地的测点证明是精确的,但一般地说在距海岸几百公里之内,改正值是不适当的.
Atmospheric quality loads and deforms the crust By deconvoluting the daily global atmospheric pressure data and the Green’s function of the mass load, we calculate the atmospheric loading (including those related to short-term atmospheric disturbances) The time-dependent relationship between the geodetic measurements and the gravitational observation of the earth’s surface shows the response of the Earth without oceanic earth and with an inverted barometer ocean. Negative pressure oceans significantly affect the load response of the near-shore stations. Vertical displacements are often 15-20 mm with a perturbation of 3-6 dB Gal. The baseline variation can be as large as 20 mm or more. This perturbation reaches its maximum at high latitudes and in winter. These changes in amplitude are related to Rabbel and Zs. hau (1985). They simulate the atmospheric pressure perturbations using a Gaussian function that is related to a certain radius, and it is enough to calculate the deformation of the crust using the existing pressure data at stations measuring about 100 mt apart. The absurd correction values assumed by Rabbel and Zsc-Au for these bit positions calculated using local barometric and regional mean pressures proved to be accurate for measuring points just in the interior, but generally speaking hundreds of kilometers from the coast The correct value is not appropriate.