Hydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years ago
<p>The “4.2 ka event” is frequently described as a major global climate anomaly between 4.2 and 3.9 ka, which defines the beginning of the current Meghalayan age in the Holocene epoch. The “event” has been disproportionately reported from proxy records from the Northern H...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-12-01
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| Series: | Climate of the Past |
| Online Access: | https://www.clim-past.net/14/1881/2018/cp-14-1881-2018.pdf |
| _version_ | 1818158420566474752 |
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| author | H. Li H. Cheng H. Cheng A. Sinha G. Kathayat C. Spötl A. A. André A. Meunier J. Biswas P. Duan Y. Ning R. L. Edwards |
| author_facet | H. Li H. Cheng H. Cheng A. Sinha G. Kathayat C. Spötl A. A. André A. Meunier J. Biswas P. Duan Y. Ning R. L. Edwards |
| author_sort | H. Li |
| collection | DOAJ |
| description | <p>The “4.2 ka event” is frequently described as a major global
climate anomaly between 4.2 and 3.9 ka, which defines the beginning of
the current Meghalayan age in the Holocene epoch. The “event” has been
disproportionately reported from proxy records from the Northern Hemisphere, but
its climatic manifestation remains much less clear in the Southern Hemisphere.
Here, we present highly resolved and chronologically well-constrained
speleothem oxygen and carbon isotopes records between <span class="inline-formula">∼6</span> and 3 ka
from Rodrigues Island in the southwestern subtropical Indian Ocean, located
<span class="inline-formula">∼600</span> km east of Mauritius. Our records show that the 4.2 ka event did not manifest itself as a period of major climate change at Rodrigues Island in
the context of our record's length. Instead, we find evidence for a
multi-centennial drought that occurred near-continuously between 3.9 and
3.5 ka and temporally coincided with climate change throughout the
Southern Hemisphere.</p> |
| first_indexed | 2024-12-11T15:29:48Z |
| format | Article |
| id | doaj.art-0836afbb2f964802856adc476b56bf86 |
| institution | Directory Open Access Journal |
| issn | 1814-9324 1814-9332 |
| language | English |
| last_indexed | 2024-12-11T15:29:48Z |
| publishDate | 2018-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Climate of the Past |
| spelling | doaj.art-0836afbb2f964802856adc476b56bf862022-12-22T01:00:05ZengCopernicus PublicationsClimate of the Past1814-93241814-93322018-12-01141881189110.5194/cp-14-1881-2018Hydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years agoH. Li0H. Cheng1H. Cheng2A. Sinha3G. Kathayat4C. Spötl5A. A. André6A. Meunier7J. Biswas8P. Duan9Y. Ning10R. L. Edwards11Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, ChinaInstitute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, ChinaDepartment of Earth Sciences, University of Minnesota, Minneapolis, USADepartment of Earth Science, California State University Dominguez Hills, Carson, USAInstitute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, ChinaInstitute of Geology, University of Innsbruck, Innsbruck, AustriaFrancois Leguat Giant Tortoise and Cave Reserve, Anse Quitor, Rodrigues Island, MauritiusFrancois Leguat Giant Tortoise and Cave Reserve, Anse Quitor, Rodrigues Island, MauritiusNational Cave Research and Protection Organization, Raipur, IndiaInstitute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, ChinaInstitute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, ChinaDepartment of Earth Sciences, University of Minnesota, Minneapolis, USA<p>The “4.2 ka event” is frequently described as a major global climate anomaly between 4.2 and 3.9 ka, which defines the beginning of the current Meghalayan age in the Holocene epoch. The “event” has been disproportionately reported from proxy records from the Northern Hemisphere, but its climatic manifestation remains much less clear in the Southern Hemisphere. Here, we present highly resolved and chronologically well-constrained speleothem oxygen and carbon isotopes records between <span class="inline-formula">∼6</span> and 3 ka from Rodrigues Island in the southwestern subtropical Indian Ocean, located <span class="inline-formula">∼600</span> km east of Mauritius. Our records show that the 4.2 ka event did not manifest itself as a period of major climate change at Rodrigues Island in the context of our record's length. Instead, we find evidence for a multi-centennial drought that occurred near-continuously between 3.9 and 3.5 ka and temporally coincided with climate change throughout the Southern Hemisphere.</p>https://www.clim-past.net/14/1881/2018/cp-14-1881-2018.pdf |
| spellingShingle | H. Li H. Cheng H. Cheng A. Sinha G. Kathayat C. Spötl A. A. André A. Meunier J. Biswas P. Duan Y. Ning R. L. Edwards Hydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years ago Climate of the Past |
| title | Hydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years ago |
| title_full | Hydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years ago |
| title_fullStr | Hydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years ago |
| title_full_unstemmed | Hydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years ago |
| title_short | Hydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years ago |
| title_sort | hydro climatic variability in the southwestern indian ocean between 6000 and 3000 years ago |
| url | https://www.clim-past.net/14/1881/2018/cp-14-1881-2018.pdf |
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