A two million year record of low-latitude aridity linked to continental weathering from the Maldives
| Autor(a) principal: | |
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| Data de Publicação: | 2018 |
| Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
| Texto Completo: | http://hdl.handle.net/10400.1/12287 |
Resumo: | Tem uma correção em http://hdl.handle.net/10400.1/12390 |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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A two million year record of low-latitude aridity linked to continental weathering from the MaldivesMaldivesOrbital cyclesIndian-Asian history of aridityMid Pleistocene transitionNon-destructive core scanningComposition of lithogenic fractionIODP Exp 359Tem uma correção em http://hdl.handle.net/10400.1/12390Indian-Asian monsoon has oscillated between warm/wet interglacial periods and cool/dry glacial periods with periodicities closely linked to variations in Earth’s orbital parameters. However, processes that control wet versus dry, i.e. aridity cyclical periods on the orbital time-scale in the low latitudes of the Indian-Asian continent remain poorly understood because records over millions of years are scarce. The sedimentary record from International Ocean Discovery Program (IODP) Expedition 359 provides a well-preserved, high-resolution, continuous archive of lithogenic input from the Maldives reflecting on low-latitude aridity cycles. Variability within the lithogenic component of sedimentary deposits of the Maldives results from changes in monsoon-controlled sedimentary sources. Here, we present X-ray fluorescence (XRF) core-scanning results from IODP Site U1467 for the past two million years, allowing full investigation of orbital periodicities. We specifically use the Fe/K as a terrestrial climate proxy reflecting on wet versus dry conditions in the source areas of the Indian-Asian landmass, or from further afield. The Fe/K record shows orbitally forced cycles reflecting on changes in the relative importance of aeolian (stronger winter monsoon) during glacial periods versus fluvial supply (stronger summer monsoon) during interglacial periods. For our chronology, we tuned the Fe/K cycles to precessional insolation changes, linking Fe/K maxima/minima to insolation minima/maxima with zero phase lag. Wavelet and spectral analyses of the Fe/K record show increased dominance of the 100 kyr cycles after the Mid Pleistocene Transition (MPT) at 1.25 Ma in tandem with the global ice volume benthic δ18O data (LR04 record). In contrast to the LR04 record, the Fe/K profile resolves 100-kyr-like cycles around the 130 kyr frequency band in the interval from 1.25 to 2 million years. These 100-kyr-like cycles likely form by bundling of two or three obliquity cycles, indicating that low-latitude Indian-Asian climate variability reflects on increased tilt sensitivity to regional eccentricity insolation changes (pacing tilt cycles) prior to the MPT. The implication of appearance of the 100 kyr cycles in the LR04 and the Fe/K records since the MPT suggests strengthening of a climate link between the low and high latitudes during this period of climate transition.SFRH/BPD/96960/2013; PTDC/MAR-PRO/3396/2014BMCSapientiaKunkelova, TerezaJung, Simon J. A.de Leau, Erica S.Odling, NickThomas, Alex L.Betzler, ChristianEberli, Gregor P.Alvarez-Zarikian, Carlos A.Alonso-Garcia, MontserratBialik, Or M.Blättler, Clara L.Guo, Junhua A.Haffen, SébastienHorozal, SenayMee, Anna L. H.Inoue, MayuriJovane, LuigiLanci, LucaLaya, Juan C.Lüdmann, ThomasBejugam, Nagender N.Nakakuni, MasatoshiNiino, KaoruPetruny, Loren M.Pratiwi, Santi D.Reijmer, John J. G.Reolid, JesúsSlagle, Angela L.Sloss, Craig R.Su, XiangSwart, Peter K.Wright, James D.Yao, ZhengquanYoung, Jeremy R.Lindhorst, SebastianStainbank, StephanieRueggeberg, AndresSpezzaferri, SilviaCarrasqueira, IgorHu, SiyaoKroon, Dick2019-01-09T13:18:52Z2018-12-182019-01-01T07:34:18Z2018-12-18T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/12287engProgress in Earth and Planetary Science. 2018 Dec 18;5(1):86s40645-018-0238-xinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:24:14Zoai:sapientia.ualg.pt:10400.1/12287Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:03:38.246467Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
| dc.title.none.fl_str_mv |
A two million year record of low-latitude aridity linked to continental weathering from the Maldives |
| title |
A two million year record of low-latitude aridity linked to continental weathering from the Maldives |
| spellingShingle |
A two million year record of low-latitude aridity linked to continental weathering from the Maldives Kunkelova, Tereza Maldives Orbital cycles Indian-Asian history of aridity Mid Pleistocene transition Non-destructive core scanning Composition of lithogenic fraction IODP Exp 359 |
| title_short |
A two million year record of low-latitude aridity linked to continental weathering from the Maldives |
| title_full |
A two million year record of low-latitude aridity linked to continental weathering from the Maldives |
| title_fullStr |
A two million year record of low-latitude aridity linked to continental weathering from the Maldives |
| title_full_unstemmed |
A two million year record of low-latitude aridity linked to continental weathering from the Maldives |
| title_sort |
A two million year record of low-latitude aridity linked to continental weathering from the Maldives |
| author |
Kunkelova, Tereza |
| author_facet |
Kunkelova, Tereza Jung, Simon J. A. de Leau, Erica S. Odling, Nick Thomas, Alex L. Betzler, Christian Eberli, Gregor P. Alvarez-Zarikian, Carlos A. Alonso-Garcia, Montserrat Bialik, Or M. Blättler, Clara L. Guo, Junhua A. Haffen, Sébastien Horozal, Senay Mee, Anna L. H. Inoue, Mayuri Jovane, Luigi Lanci, Luca Laya, Juan C. Lüdmann, Thomas Bejugam, Nagender N. Nakakuni, Masatoshi Niino, Kaoru Petruny, Loren M. Pratiwi, Santi D. Reijmer, John J. G. Reolid, Jesús Slagle, Angela L. Sloss, Craig R. Su, Xiang Swart, Peter K. Wright, James D. Yao, Zhengquan Young, Jeremy R. Lindhorst, Sebastian Stainbank, Stephanie Rueggeberg, Andres Spezzaferri, Silvia Carrasqueira, Igor Hu, Siyao Kroon, Dick |
| author_role |
author |
| author2 |
Jung, Simon J. A. de Leau, Erica S. Odling, Nick Thomas, Alex L. Betzler, Christian Eberli, Gregor P. Alvarez-Zarikian, Carlos A. Alonso-Garcia, Montserrat Bialik, Or M. Blättler, Clara L. Guo, Junhua A. Haffen, Sébastien Horozal, Senay Mee, Anna L. H. Inoue, Mayuri Jovane, Luigi Lanci, Luca Laya, Juan C. Lüdmann, Thomas Bejugam, Nagender N. Nakakuni, Masatoshi Niino, Kaoru Petruny, Loren M. Pratiwi, Santi D. Reijmer, John J. G. Reolid, Jesús Slagle, Angela L. Sloss, Craig R. Su, Xiang Swart, Peter K. Wright, James D. Yao, Zhengquan Young, Jeremy R. Lindhorst, Sebastian Stainbank, Stephanie Rueggeberg, Andres Spezzaferri, Silvia Carrasqueira, Igor Hu, Siyao Kroon, Dick |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Sapientia |
| dc.contributor.author.fl_str_mv |
Kunkelova, Tereza Jung, Simon J. A. de Leau, Erica S. Odling, Nick Thomas, Alex L. Betzler, Christian Eberli, Gregor P. Alvarez-Zarikian, Carlos A. Alonso-Garcia, Montserrat Bialik, Or M. Blättler, Clara L. Guo, Junhua A. Haffen, Sébastien Horozal, Senay Mee, Anna L. H. Inoue, Mayuri Jovane, Luigi Lanci, Luca Laya, Juan C. Lüdmann, Thomas Bejugam, Nagender N. Nakakuni, Masatoshi Niino, Kaoru Petruny, Loren M. Pratiwi, Santi D. Reijmer, John J. G. Reolid, Jesús Slagle, Angela L. Sloss, Craig R. Su, Xiang Swart, Peter K. Wright, James D. Yao, Zhengquan Young, Jeremy R. Lindhorst, Sebastian Stainbank, Stephanie Rueggeberg, Andres Spezzaferri, Silvia Carrasqueira, Igor Hu, Siyao Kroon, Dick |
| dc.subject.por.fl_str_mv |
Maldives Orbital cycles Indian-Asian history of aridity Mid Pleistocene transition Non-destructive core scanning Composition of lithogenic fraction IODP Exp 359 |
| topic |
Maldives Orbital cycles Indian-Asian history of aridity Mid Pleistocene transition Non-destructive core scanning Composition of lithogenic fraction IODP Exp 359 |
| description |
Tem uma correção em http://hdl.handle.net/10400.1/12390 |
| publishDate |
2018 |
| dc.date.none.fl_str_mv |
2018-12-18 2018-12-18T00:00:00Z 2019-01-09T13:18:52Z 2019-01-01T07:34:18Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
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publishedVersion |
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http://hdl.handle.net/10400.1/12287 |
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http://hdl.handle.net/10400.1/12287 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
Progress in Earth and Planetary Science. 2018 Dec 18;5(1):86 s40645-018-0238-x |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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BMC |
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BMC |
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reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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