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| DOI | 10.1038/s41561-021-00842-w |
| Stormier mid-Holocene southwest Indian Ocean due to poleward trending tropical cyclones | |
| Green A.N.; Cooper J.A.G.; Loureiro C.; Dixon S.; Hahn A.; Zabel M. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 卷号 | 15期号:1 |
| 英文摘要 | Geological evidence of past storminess is fundamental for contextualizing long-term climate variability and investigating future climate. Unlike the Atlantic and Pacific basins, robust storminess reconstructions do not exist for most of the Indian Ocean, despite the hazard that tropical cyclones pose to the SE African margin. Here we combine seismic stratigraphy with analysis of marine sediment cores to look for regionally representative storm-related sediment deposits (tempestites) intercalated in shoreface sediments from the SW Indian Ocean off South Africa. Tempestites, represented by hummocky seismic units, whose sediments have clear marine geochemical signatures, are found to have been deposited between 7.0 and 4.8 cal kyr BP, when sea level was between 0 and +3 m above present. Deposition and preservation of the tempestites reflect unprecedented tropical cyclone impacts, associated with periods of strongly positive Indian Ocean Dipole anomalies and linked to warmer sea surface temperatures. Future climate projections suggest stronger positive IOD anomalies and further intensification and poleward migration of tropical cyclones, like their mid-Holocene predecessors. Given the rarity of tropical cyclone landfalls in South Africa, this urges a revaluation of hazards in areas along the SE African coast likely to become more vulnerable to landfalling tropical cyclones in the future. © 2021, The Author(s), under exclusive licence to Springer Nature Limited. |
| 语种 | 英语 |
| scopus关键词 | coast; Indian Ocean Dipole; marine sediment; sea level; sea surface; sea surface temperature; seismic stratigraphy; tropical cyclone; Indian Ocean; Indian Ocean (Southwest); South Africa |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/250813 |
| 作者单位 | Geological Sciences, School of Agricultural, Earth and Environmental Sciences, University of KwaZulu-Natal, Durban, South Africa; School of Environmental Sciences, Centre for Coastal and Marine Research, Ulster University, Coleraine, United Kingdom; Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, United Kingdom; MARUM - Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany |
| 推荐引用方式 GB/T 7714 | Green A.N.,Cooper J.A.G.,Loureiro C.,et al. Stormier mid-Holocene southwest Indian Ocean due to poleward trending tropical cyclones[J],2022,15(1). |
| APA | Green A.N.,Cooper J.A.G.,Loureiro C.,Dixon S.,Hahn A.,&Zabel M..(2022).Stormier mid-Holocene southwest Indian Ocean due to poleward trending tropical cyclones.Nature Geoscience,15(1). |
| MLA | Green A.N.,et al."Stormier mid-Holocene southwest Indian Ocean due to poleward trending tropical cyclones".Nature Geoscience 15.1(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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