Earth rotation and the ocean's circulation

地球自转和海洋环流

• 批准号: 5456158
• 负责人: Dr. Jens Schröter
• 金额: --
• 依托单位: Alfred-Wegener-Institut (AWI) Helmholtz-Zentrum für Polar- und Meeresforschung
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5456158?language=en
• 关键词: Earth; rotation; ocean; circulation

The goal of this proposal is to contribute to the interpretation of Earth rotation measurements with a focus on the role of the ocean. We will estimate the oceanic angular momentum for the last fifty years as accurate as possible. Two complementary methods will be applied. The first is advanced numerical ocean modeling which considers all processes of importance and which will be extended to derive the local torques excited by the ocean on the solid Earth and vice versa. The second approach tries to close the angular momentum budget by assimilation of angular momentum time series into a global circulation model. To this end the measured Earth rotation parameters are corrected for best estimates of the contributions by the atmosphere, the cryosphere and hydrology. This ¿measured¿ ocean angular momentum time series is subsequently assimilated into a global ocean model to determine ERP parameters that are consistent with observations and ocean dynamics. The result will also be a major step forward in determining which part of the observed sea level rise is due to global warming in contrast to an increase in ocean mass.

该提案的目标是促进对地球自转测量的解释，重点是海洋的作用。我们将尽可能准确地估计过去50年的海洋角动量。将采用两种互补的方法。第一个是先进的数值海洋建模，它考虑到所有重要的过程，并将扩展到推导出固体地球上的海洋所激发的局部扭矩，反之亦然。第二种方法试图通过同化角动量时间序列到一个全球环流模式来关闭角动量收支。为此，对测得的地球自转参数进行了校正，以便对大气层、冰冻圈和水文的贡献作出最佳估计。这……测量的海洋角动量时间序列随后被同化到全球海洋模式中，以确定与观测和海洋动力学相一致的ERP参数。这一结果也将是确定观测到的海平面上升的哪一部分是由于全球变暖而不是海洋质量增加的一个重要步骤。

项目成果

Numerical Simulations of Short-Term Non-tidal Ocean Mass Anomalies

短期非潮汐海洋质量异常的数值模拟

• DOI: 10.1007/978-3-642-10228-8_10
• 作者: Dobslaw;Thomas
• 通讯作者: Thomas

Ensemble Kalman filtering of Earth rotation observations with a global ocean model

使用全球海洋模型对地球自转观测进行集合卡尔曼滤波

• DOI: 10.1016/j.jog.2011.10.003
• 期刊: Journal of Geodynamics
• 影响因子: 2.3
• 作者: Saynisch J;Thomas
• 通讯作者: Thomas

Seasonal polar motion excitation from numerical models of atmosphere, ocean, and continental hydrosphere

• DOI: 10.1029/2009jb007127
• 发表时间: 2010-10
• 期刊: Journal of Geophysical Research
• 作者: H. Dobslaw;R. Dill;A. Grötzsch;A. Brzeziński;Maik Thomas

Assimilation of GRACE-derived oceanic mass distributions with a global ocean circulation model

用全球海洋环流模型同化 GRACE 得出的海洋质量分布

• DOI: 10.1007/s00190-014-0766-0
• 发表时间: 2015
• 期刊: Journal of Geodesy
• 影响因子: 4.4
• 作者: Saynisch J;Bergmann-Wolf;Thomas
• 通讯作者: Thomas

Short-term polar motion forecasts from earth system modeling data

• DOI: 10.1007/s00190-010-0391-5
• 发表时间: 2010-06
• 期刊: Journal of Geodesy
• 影响因子: 4.4
• 作者: R. Dill;H. Dobslaw