| Titre | A late Holocene shift of typhoon activity recorded by coastal sedimentary archives in eastern China |
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| Auteur | Yang, Y ; Zhou, L;
Piper, D J W; Normandeau, A; Jia, J; Wang, Y P; Shi, B; Gao, S |
| Source | Sedimentology vol. 69, 2021 p. 954-969, https://doi.org/10.1111/sed.12934 |
| Image |  |
| Année | 2021 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200026 |
| Éditeur | American Geophysical Union |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1111/sed.12934 |
| Media | papier; en ligne; numérique |
| Formats | pdf; html |
| Lat/Long OENS | 110.0000 130.0000 40.0000 15.0000 |
| Sujets | tempêtes; effets climatiques; climat; Nature et environnement; Sciences et technologie; sédimentologie; Quaternaire |
| Illustrations | cartes de localisation; figures; graphiques; modèles; tableaux |
| Diffusé | 2021 08 21 |
| Résumé | (disponible en anglais seulement)
Frequency changes in intense typhoons are of great concern to modern society. However, current understanding of the influence of climate on typhoon activity on
the millennial scale is restricted by the sparseness of preobservational reconstructions in the north-western Pacific. This study presents a 5500 year long typhoon record from the Jiangsu coast that provides the first >2 ka record in eastern China.
Variations in the D90 grain size are the best predictor of recent typhoons in a second short high-resolution core. Comparison with other typhoon records from south-eastern China establishes a China millennial typhoon variability index during the
middle to late Holocene, with maxima at ca 4750 +/- 170, 3500 +/- 220, 1500 +/- 480 and 250 +/- 170 yr BP and minima at ca 5200 +/- 300, 4150 +/- 430, 2600 +/- 650 and 750 +/- 270 yr BP. Peaks in typhoon activity in south-eastern China (compared with
Japan) correlate with damped (enhanced) El Ni~no-Southern Oscillation and weak (strong) East Asian Summer Monsoon, indicating a seesaw pattern in typhoon activity between the two regions. A shift in typhoon frequency pattern was also identified
around 2000 yr BP in south-eastern China, with subsequent more frequent typhoon activity. At that time there was sustained Atlantic Meridional Overturning Circulation reduction and its associated El Ni~no-Southern Oscillation enhancement, so Atlantic
Meridional Overturning Circulation-driven El Ni~no-Southern Oscillation changes are likely to be the major cause of the significant increase in typhoon activity since 2000 yr BP, resulting in the 1500 +/- 480 and 250 +/- 170 yr BP China millennial
typhoon variability peaks. To accurately predict changes in intense typhoon activity, it is therefore important to understand how the Atlantic Meridional Overturning Circulation and El Ni~no-Southern Oscillation will respond to future climate
change. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Cette étude compare la cyclicité à l'échelle du millénaire, au cours des 5 000 dernières années, des ouragans ou des typhons dans l'océan
Atlantique Nord et l'océan Pacifique Nord. Le réchauffement climatique précoce, il y a 2500 ans, a provoqué un changement dans la périodicité et les mécanismes de forçage de ces tempêtes. |
| GEOSCAN ID | 325454 |
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