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      Influence of ENSO Events on Tropical Cyclone Activity over the Western North Pacific

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          Abstract

          Based on an analysis of 51-year (1965–2015) data, the influence of El Niño–Southern Oscillation (ENSO) events on tropical cyclone (TC) activity is examined over the western North Pacific (WNP). The total number of TCs formed in the entire WNP reduces by about 3.4 TCs per year in La Niña years, whereas TCs have an equivalent genesis number between El Niño years and climatology. During El Niño years, the frequency of TC formation increases remarkably in the southeast quadrant (140˚E–180˚, 0˚–17˚N) and decreases in the northwest quadrant (120˚–140˚E, 17˚–30˚N). During La Niña years, TCs tend to form in the northwest and southwest quadrants (120˚–140˚E, 0˚–17˚N) quadrants. TCs tend to become long-lived in the peak season (from July to September) of El Niño years and during strong El Niño events. TC genesis shows a southeastward positive shift in terms of lifetime and intensity during El Niño years, thus more super TCs (winds ≥ 58.64 m s −1) are formed in the southeast quadrant. Further analysis using the genesis potential index (GPI) indicates that the interannual variations in the TC genesis and track are significantly influenced by a combination of large-scale dynamic and thermodynamic conditions.

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          Author and article information

          Journal
          JOUC
          Journal of Ocean University of China
          Science Press and Springer (China )
          1672-5182
          06 July 2019
          01 October 2019
          : 18
          : 4
          : 784-794
          Affiliations
          1State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
          2National Marine Environmental Forecasting Center, Ministry of Natural Resources, Beijing 100081, China
          Author notes
          *Corresponding author: LIU Zenghong
          Article
          s11802-019-3923-5
          10.1007/s11802-019-3923-5
          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).

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          Self URI (journal-page): https://www.springer.com/journal/11802

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