GRACE and GRACE-FO Related Publications (no abstracts)

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The construction of high precision geostrophic currents based on new gravity models of GOCE and satellite altimetry data

Sui, Wenyan, Guo, Junru, Song, Jun, Liu, Zhiliang, Wang, Meng, Li, Xibin, Fu, Yanzhao, Li, Yongquan, Cai, Yu, Wang, Linhui, Li, Lingli, Guo, Xiaofang, and Zuo, Wenting, 2021. The construction of high precision geostrophic currents based on new gravity models of GOCE and satellite altimetry data. Acta Oceanologica Sinica, 40(3):142–152, doi:10.1007/s13131-021-1707-4.

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@ARTICLE{2021AcOSn..40..142S,
       author = {{Sui}, Wenyan and {Guo}, Junru and {Song}, Jun and {Liu}, Zhiliang and {Wang}, Meng and {Li}, Xibin and {Fu}, Yanzhao and {Li}, Yongquan and {Cai}, Yu and {Wang}, Linhui and {Li}, Lingli and {Guo}, Xiaofang and {Zuo}, Wenting},
        title = "{The construction of high precision geostrophic currents based on new gravity models of GOCE and satellite altimetry data}",
      journal = {Acta Oceanologica Sinica},
     keywords = {GOCE, gravity field model, mean dynamic topography, geostrophic current},
         year = 2021,
        month = mar,
       volume = {40},
       number = {3},
        pages = {142-152},
     abstract = "{The new gravity field models of gravity field and steady-state ocean
        circulation explorer (GOCE), TIM\_R6 and DIR\_R6, were released
        by the European Space Agency (ESA) in June 2019. The sixth
        generation of gravity models have the highest possible signal
        and lowest error levels compared with other GOCE-only gravity
        models, and the accuracy is significantly improved. This is an
        opportunity to build high precision geostrophic currents. The
        mean dynamic topography and geostrophic currents have been
        calculated by the 5th (TIM\_R5 and DIR\_R5), 6th (TIM\_R6 and
        DIR\_R6) release of GOCE gravity field models and ITSG-Grace2018
        of GRACE gravity field model in this study. By comparison with
        the drifter results, the optimal filtering lengths of them have
        been obtained (for DIR\_R5, DIR\_R6, TIM\_R5 and TIM\_R6 models
        are 1{\textdegree} and for ITSG-Grace2018 model is
        1.1{\textdegree}). The filtered results show that the
        geostrophic currents obtained by the GOCE gravity field models
        can better reflect detailed characteristics of ocean currents.
        The total geostrophic speed based on the TIM\_R6 model is
        similar to the result of the DIR\_R6 model with standard
        deviation (STD) of 0.320 m/s and 0.321 m/s, respectively. The
        STD of the total velocities are 0.333 m/s and 0.325 m/s for
        DIR\_R5 and TIM\_R5. When compared with ITSG-Grace2018 results,
        the STD (0.344 m/s) of total geostrophic speeds is larger than
        GOCE results, and the accuracy of geostrophic currents obtained
        by ITSG-Grace2018 is lower. And the absolute errors are mainly
        distributed in the areas with faster speeds, such as the
        Antarctic circumpolar circulation, equatorial region, Kuroshio
        and Gulf Stream areas. After the remove-restore technique was
        applied to TIM\_R6 MDT, the STD of total geostrophic speeds
        dropped to 0.162 m/s.}",
          doi = {10.1007/s13131-021-1707-4},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2021AcOSn..40..142S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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