echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Biochemistry News > Biotechnology News > The characteristics of long-term changes of typical seasonal effective wave heights in the Northwest Pacific and South China Sea and their impact mechanisms are revealed

    The characteristics of long-term changes of typical seasonal effective wave heights in the Northwest Pacific and South China Sea and their impact mechanisms are revealed

    • Last Update: 2021-07-30
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

      Recently, the Peng Shiqiu team of the State Key Laboratory of Tropical Marine Environment ( LTO ) of the South China Sea Institute of Oceanology, Chinese Academy of Sciences revealed the characteristics of long-term (temporal and spatial) changes in typical seasonal (winter, summer) effective wave heights and their impact mechanisms in the Northwest Pacific - South China Sea.
    Research results Published in
    Climate Dynamics "Climate Dynamics" (the first author is Assistant Researcher Li Shaotian, and the corresponding authors are Researcher Li Yineng and Researcher Peng Shiqiu)
    .
     

      The research team constructed a sea-atmosphere coupling model and wave model covering the East Indian Ocean , South China Sea and Northwest Pacific, and formed a long-term wind - wave data set of the East Indian Ocean , South China Sea and Northwest Pacific ( 1981~2014 , 34 years) .
    The horizontal resolution of this data set is 0.
    25
    °, and it contains elements such as 10- meter meridional wind and zonal wind at the sea surface, sea surface pressure, effective wave height, average wavelength, average wave period, and average wave direction .
    Based on this data set, a systematic study was conducted on the long-term characteristics and influence mechanism of the effective wave height in the typical seasons (winter and summer) in the Northwest Pacific - South China Sea .



     

      The results of the study show that for the winter, the regions with dramatic interannual changes in effective wave heights are distributed in the northern South China Sea and the Pacific east of the Philippine Islands, and are remotely related to ENSO events through the Philippine anticyclone : strong warm (cold) events in the equatorial central and eastern Pacific.
    The Philippine anticyclone (cyclone) weakened (intensified) the East Asian winter monsoon, which led to the weakening (intensifying) of the wave height in the northern part of the South China Sea and the Pacific Ocean to the east of the Philippine Islands

    .
    On the other hand, the wave height changes in the northern part of the South China Sea and the Pacific Ocean east of Japan are affected by the Aleutian Low (
    AL ), showing a northeast - southwest "dipole" shape, showing interdecadal changes
    .
    That is, as the
    AL center moves eastward and its intensity increases, the westerly wind in the mid-latitude Pacific Ocean increases and the wave height increases, while the northeast monsoon and wave height in the northern part of the South China Sea weaken
    .
    For the summer, the wave height changes in the tropical northwest Pacific are mainly controlled by strong typhoon activity (Figure
    1a ), while the wave height changes in the central and southern South China Sea are affected by the South China Sea summer monsoon (Figure 1b ), both of which show interannual changes.
    and by
    ENSO regulated
    .
    For example, the strong
    El Ni
    that occurred in the previous winter ? o The event caused the anticyclone in the Philippines to continue until the beginning of the next summer due to the positive feedback effect of the sea surface cooling of the western Pacific Ocean and the northeast trade wind, which weakened the South China Sea summer monsoon and the wave height in the central and southern South China Sea (Figure 1b )
    .
     

      

    Figure 1 ( a ) El Nino regulates the typhoon activity and wave height changes in the Northwest Pacific and ( b ) the mechanism of El Nino regulating the South China Sea summer monsoon and wave height changes in the central and southern South China Sea in the previous winter 

      The research results were introduced by the national key research and development plan, the National Natural Science Foundation of China (major projects, key projects and general projects), the Guangdong Special Support Program, the Southern Ocean Science and Engineering Guangdong Laboratory (Guangzhou) talent team introduced major special projects and The Chinese Academy of Sciences' Strategic Leading Science and Technology Project ( Type A ) was jointly funded and completed
    .
     

      Related paper information:  Li, S.
    , Li, Y.
    * , Peng, S.
    * , Qi Z.
    .
    2021.
    The inter-annual variations of the significant wave height in the Western North Pacific and South China Sea region.
    Clim Dyn .
    56(9), 3065-3080.
    https://doi.
    org/10.
    1007/s00382-021-05636-9
     

    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent Echemi's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.