Investigation of Hydrological and Atmospheric Loading by Space Geodetic Techniques

摘要: Observations of sea level can only be interpreted correctly if land motion in particular terms vertical deformation coastal areas is taken into account. In the last decades space geodetic techniques such as VLBI (Very Long Baseline Interferometry), SLR (Satellite Laser Ranging), GPS (Global Positioning System), and Doris (Doppler Orbitography Radio positioning Integrated by Satellite) have proved to very powerful for determining displacements points on solid Earth. These modeled using various geodynamical parameters, e.g. Love Shida numbers model Earth tides site-dependent amplitudes phases ocean loading models. Today, small deformations associated with response atmospheric hydrological are growing interest. effects cause ranges up ±30mm due pressure variations mass redistribution surface fluid envelopes, continental water reservoirs (soil moisture, snow, groundwater). Several new global regional models soil moisture snow depths now available validated techniques. This paper intended give a short overview about state-of-the-art modeling effects. A introduction Special Bureau Loading within Global Geophysical Fluid Center (GGFC) IERS will given, too. Finally, it shown how influence results high precision measurements. The mainly concentrates crustal motions seasonal interannual time scales observed describes also some obtained from Doris.