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

Assimilation of GRACE-derived oceanic mass distributions with a global ocean circulation model
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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
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发表时间:
2015
期刊:
影响因子:
4.4
通讯作者:
Thomas
Thomas
中科院分区:
地球科学1区
文献类型:
--
作者:
Saynisch J;Bergmann-Wolf;Thomas

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为了研究海洋质量异常的亚季节分布和产生,利用重力恢复与气候实验(GRACE)的日、月分辨率观测资料,采用基于集合的卡尔曼滤波技术,将其同化到一个全球海洋环流模式中。将卫星重力观测数据处理成海洋质量分布的时变场。估计了观测值和海洋模式初始状态的误差预算,其中包含全部协方差信息。GRACE观测和海洋模式之间的一致性增加所示的方法的一致性。此外,模拟进行了比较,从54个底部压力记录器的独立观察。同化提高协议高纬度记录器高达2百帕。这种改善是由同化引起的大气风强迫的变化引起的,即,GRACE无法直接观测到的量。最后,使用开发的卡尔曼滤波器的方法作为一个去噪滤波器,以消除人为噪声污染的GRACE观测。
To study the sub-seasonal distribution and generation of ocean mass anomalies, Gravity Recovery and Climate Experiment (GRACE) observations of daily and monthly resolution are assimilated into a global ocean circulation model with an ensemble-based Kalman-Filter technique. The satellite gravimetry observations are processed to become time-variable fields of ocean mass distribution. Error budgets for the observations and the ocean model’s initial state are estimated which contain the full covariance information. The consistency of the presented approach is demonstrated by increased agreement between GRACE observations and the ocean model. Furthermore, the simulations are compared with independent observations from 54 bottom pressure recorders. The assimilation improves the agreement to high-latitude recorders by up to 2 hPa. The improvements are caused by assimilation-induced changes in the atmospheric wind forcing, i.e., quantities not directly observed by GRACE. Finally, the use of the developed Kalman-Filter approach as a destriping filter to remove artificial noise contaminating the GRACE observations is presented.
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
M. Vianna;V. Menezes;D. Chambers
通讯作者: D. Chambers
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DOI: 10.5194/npg-18-581-2011
发表时间: 2011
影响因子: 2.2
作者:
J. Saynisch;M. Wenzel;J. Schröter
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发表时间: 2011
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DOI: 10.1029/2006gl028588
发表时间: 2007
影响因子: 5.2
作者:
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GRACE 数据中高频海洋信号的评估:对去混叠的影响
DOI: --
发表时间: 2011
期刊:
影响因子: --
作者:
J. Bonin;D. Chambers
通讯作者: D. Chambers