De-aliasing of Short-term Atmospheric and Oceanic Mass Variations for GRACE
De-aliasing of Short-term Atmospheric and Oceanic Mass Variations for GRACE
复制标题
GRACE 短期大气和海洋质量变化的去锯齿
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
U. Meyer
中科院分区：
文献类型：
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作者：
F. Flechtner;R. Schmidt;U. Meyer
GFZ负责大气和海洋质量变化的常规计算，这些变化在GRACE精密定轨和计算重力场偏导数时必须考虑。这一1B级大气和海洋去混叠产品（AOD 1B）以球谐系数的形式提供给GRACE科学数据系统和用户群，最大延迟时间约为3-4天，这取决于所需ECMWF气象场的可用性。大气质量的垂直积分考虑了大气的空间和时间变化的垂直结构。海洋质量变化是由JPL提供的正压海洋模式（PPHA）导出的。在本文的第一部分中描述的个人大气和海洋的贡献，以及处理策略，以获得合并的AOD 1B产品。
GFZ is responsible for routine calculation of atmospheric and oceanic mass variations which have to be considered during GRACE precise orbit determination and calculation of gravity field partial derivatives. This Level-1B Atmosphere and Ocean De-aliasing product (AOD1B) is made available to the GRACE Science Data System and user community in terms of spherical harmonic coefficients with a maximum time delay of about 3–4 days dependent on the availability of required ECMWF meteorological fields. The spatial and time-variable vertical structure of the atmosphere is taken into account by vertical integration of the atmospheric masses. Oceanic mass variations are derived from a barotropic ocean model (PPHA) which was provided by JPL. The individual atmospheric and oceanic contributions as well as the processing strategy to derive the combined AOD1B product are described in the first part of this paper.