Poleward migration as global warming’s possible self-regulator to restrain future western North Pacific Tropical Cyclone’s intensification

Poleward migration is an interesting phenomenon regarding the shift of Tropical Cyclones (TCs) towards higher latitudes. As climate warms, TCs’ intensification is promoted, and yet over certain oceans, TCs may also migrate poleward into colder waters. To what extent this poleward shift can impact fu...

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Bibliographic Details
Published in:NPJ climate and atmospheric science 2023-04, Vol.6 (1), p.34-9, Article 34
Main Authors: Lin, I-I, Camargo, Suzana J., Lien, Chun-Chi, Shi, Chun-An, Kossin, James P.
Format: Article
Language:English
Subjects:
704/106/35/823
704/106/694/2786
Amplification
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Climate change
Climate Change/Climate Change Impacts
Climatology
Cyclones
Earth and Environmental Science
Earth Sciences
Global warming
Oceans
Time series
Trends
Tropical cyclones
Upper bounds
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Summary:Poleward migration is an interesting phenomenon regarding the shift of Tropical Cyclones (TCs) towards higher latitudes. As climate warms, TCs’ intensification is promoted, and yet over certain oceans, TCs may also migrate poleward into colder waters. To what extent this poleward shift can impact future TC’s intensification is unclear, and a quantitative understanding of these competing processes is lacking. Through investigating one of the most likely TC basins to experience poleward migration, the western North Pacific (WNP), here we explore the issue. Potential Intensity (PI, TC’s intensification upper bound) along TC’s intensification locations (from genesis to the lifetime maximum intensity location) are analysed. We find that poleward migration can partially cancel global warming’s positive impact on future WNP TC’s intensification. With poleward migration, the PI increasing trend slope is gentler. We estimate that poleward migration can reduce the increasing trend slope of the proportion of Category-5 PI by 42% (22%) under a strong (moderate) emission pathway; and 68% (30%) increasing trend slope reduction for the average PI.
ISSN:2397-3722
2397-3722
DOI:10.1038/s41612-023-00329-y