GUO, Xinyu

Center for Marine Environmental Studies
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Last Updated :2019/03/13

Research Activities

Research Areas

  • Environmental science, Environmental dynamic analysis
  • Earth and planetary science, Meteorology/Physical oceanography/Hydrology
  • Fisheries science, General fisheries

Published Papers


  • Roles of mesoscale eddies in the Kuroshio paths
    Yasumasa Miyazawa, Xinyu Guo, Xinyu Guo, Toshio Yamagata, Toshio Yamagata, Journal of Physical Oceanography, 34, (10) 2203 - 2222,   2004 10 01 , A high-resolution ocean general circulation model is developed to simulate connections between the Kuroshio path variations and mesoscale eddy activities as realistically as possible. The climatological mean of the modeled Kuroshio takes a nearshore nonlarge meander path. It is found that the model is capable of simulating two types of nonlarge meander state and a possible version of the large meander state. The offshore nonlarge meander is generated through interaction between the Kuroshio and an anticyclonic eddy. The large meander occurs just after significant intensification of the anticyclonic Kuroshio recirculation; successive intrusion of anticyclonic eddies from the upstream region is responsible for this process. Those anticyclonic eddies are advected by the Kuroshio from the region northeast of Luzon Island and increase the upstream Kuroshio volume transport on an interannual time scale. The cyclonic eddies propagating from the Kuroshio Extension region, on the other hand, weaken the Kuroshio meander after the merger. The Kuroshio path variations south of Japan thus seem to be closely related to eddy activities in the subtropical gyre system. © 2004 American Meteorological Society.
  • Application of a two-way nested model to the seamount problem
    Hisashi Hukuda, Xinyu Guo, Journal of Oceanography, 60,   2004 01 01 , A two-way nested model has been constructed and applied to the idealized ocean where a uniform mean flow impinges on the isolated Gaussian-shaped seamount and produces two eddies (cold and warm) in the depths. The performance of the nested model has been evaluated subjectively and objectively. Both subjective and objective analyses confirm the traditional view that the nested model can well capture the performance of isolated eddies. Objective analysis, however, reveals some quantitatively important features of a two-way nested model. One is penetration of improved features into the coarse domain and another is the deterioration of mean flow field inside the nested area, neither of which is clear from subjective analysis. With successful application of two-way nested model to the seamount problem, we expect that such a nested model will also be applicable to other oceanic phenomena, particularly to some coastal problems whose time scale is short and where the topographic effects are dominant. Copyright © The Oceanographic Society of Japan.

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