+1 Recommend
1 collections
      • Record: found
      • Abstract: found
      • Article: found

      Observed Near Inertial Waves in the Wake of Typhoon Linfa (2015) in the Northern South China Sea

      Read this article at

          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.


          This study examined the characteristics and vertical propagation of near inertial waves (NIWs) induced by Typhoon Linfa (2015), based on in situ observations conducted southeast of Dongsha Islands in the South China Sea. The results demonstrate that the near inertial currents induced by Linfa had velocities up to 35 cm s −1 in the mixed layer and 20 cm s −1 in the ocean interior. The near inertial currents were polarized with predominantly clockwise-rotating components, the magnitudes of which were about 10 times larger than the counter-clockwise rotating components. The energy density spectrum showed that the emergence of NIWs resulted in energy redistribution from the diurnal band to the near inertial band. The wavenumber spectrum and the downward/upward current decomposition demonstrated that the NIWs and energy flux propagated mainly downward. The estimated vertical phase velocity and group velocity are 1.44 and 0.48 m h −1, respectively, corresponding to a vertical wavelength of 49.7 m. The e-folding time scale was 7.5 d based on the near inertial kinetic energy in the ocean interior. We found no obvious wave–wave interaction during the decay process of the NIWs. The frequency was blue-shifted, being 0.03 f 0 higher than the local inertial frequency, which was caused by the background vorticity. The normal mode analysis suggests that the higher mode plays a dominant role in the propagation stage of the NIWs.

          Related collections

          Author and article information

          Journal of Ocean University of China
          Science Press and Springer (China )
          24 August 2019
          01 October 2019
          : 18
          : 5
          : 1013-1021
          1College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China
          2First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
          3Function Laboratory for Ocean Dynamics and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
          Author notes
          *Corresponding author: WEI Zexun
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2019.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

          Self URI (journal-page):


          Comment on this article