Affiliation:
1. Pusan National University
Abstract
AbstractThe genesis longitudes of the tropical cyclone (TC) for the months of June–October exhibit the gradual westward shift since 1998 and the present study investigates the possible mechanisms. The period of 1998–2020 is characterized by the large anomalous anticyclonic circulation over the western North Pacific (WNP) and an anomalous cyclonic circulation in East Asia. Owing to this huge anomalous anticyclonic circulation, TCs could not develop over the eastern part of the WNP. In addition, the equatorial western Pacific shows a warm anomaly, while the equatorial eastern Pacific presents a cold anomaly; this negative phase of the Pacific Decadal Oscillation (PDO) demonstrates the strengthening of the Walker circulation, which causes greater prevalence of TCs to the western seas of the WNP.
Publisher
Research Square Platform LLC
Reference41 articles.
1. Barry RG, Carleton AM (2001) Synoptic and dynamic climatology. Psychology Press. p. 519. ISBN 978-0-415-03115-8
2. Camargo SJ, Emanuel KA, Sobel AH (2007) Use of a genesis potential index to diagnose ENSO effects on tropical cyclone genesis. IRI Technical Report 07 – 01, 45 pp., International Research Institute for Climate Prediction, Palisades, NY
3. Western North Pacific tropical cyclone intensity and ENSO;Camargo SJ;J Clim,2005
4. Northwestwards shift of tropical cyclone genesis position during autumn over the western North Pacific after the late 1990s;Cao X;Int J Climatol,2019
5. The interannual variability in the genesis location of tropical cyclones in the Northwest Pacific;Chia HH;J Clim,2002