Eastern South African hydroclimate over the past 270,000 years

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dc.contributor.authorSimon, Margit H
dc.contributor.authorZiegler, Martin
dc.contributor.authorBosmans, Joyce
dc.contributor.authorBarker, Stephen
dc.contributor.authorReason, Chris J C
dc.contributor.authorHall, Ian R
dc.date.accessioned2021-10-08T07:16:02Z
dc.date.available2021-10-08T07:16:02Z
dc.date.issued2016
dc.description.abstractProcesses that control the hydrological balance in eastern South Africa on orbital to millennial timescales remain poorly understood because proxy records documenting its variability at high resolution are scarce. In this work, we present a detailed 270,000 year-long record of terrestrial climate variability in the KwaZulu-Natal province based on elemental ratios of Fe/K from the southwest Indian Ocean, derived from X-ray fluorescence core scanning. Eastern South African climate variability on these time scales reflects both the long-term effect of regional insolation changes driven by orbital precession and the effects associated with high-latitude abrupt climate forcing over the past two glacial-interglacial cycles, including millennial-scale events not previously identified. Rapid changes towards more humid conditions in eastern South Africa as the Northern Hemisphere entered phases of extreme cooling were potentially driven by a combination of warming in the Agulhas Current and shifts of the subtropical anticyclones. These climate oscillations appear coherent with other Southern Hemisphere records but are anti-phased with respect to the East Asian Monsoon. Numerical modelling results reveal that higher precipitation in the KwaZulu-Natal province during precession maxima is driven by a combination of increased local evaporation and elevated moisture transport into eastern South Africa from the coast of Mozambique.
dc.identifier.apacitationSimon, M. H., Ziegler, M., Bosmans, J., Barker, S., Reason, C. J. C., & Hall, I. R. (2016). Eastern South African hydroclimate over the past 270,000 years. <i>Scientific Reports</i>, 5(1), 174 - 177. http://hdl.handle.net/11427/34753en_ZA
dc.identifier.chicagocitationSimon, Margit H, Martin Ziegler, Joyce Bosmans, Stephen Barker, Chris J C Reason, and Ian R Hall "Eastern South African hydroclimate over the past 270,000 years." <i>Scientific Reports</i> 5, 1. (2016): 174 - 177. http://hdl.handle.net/11427/34753en_ZA
dc.identifier.citationSimon, M.H., Ziegler, M., Bosmans, J., Barker, S., Reason, C.J.C. & Hall, I.R. 2016. Eastern South African hydroclimate over the past 270,000 years. <i>Scientific Reports.</i> 5(1):174 - 177. http://hdl.handle.net/11427/34753en_ZA
dc.identifier.issn2045-2322
dc.identifier.ris TY - Journal Article AU - Simon, Margit H AU - Ziegler, Martin AU - Bosmans, Joyce AU - Barker, Stephen AU - Reason, Chris J C AU - Hall, Ian R AB - Processes that control the hydrological balance in eastern South Africa on orbital to millennial timescales remain poorly understood because proxy records documenting its variability at high resolution are scarce. In this work, we present a detailed 270,000 year-long record of terrestrial climate variability in the KwaZulu-Natal province based on elemental ratios of Fe/K from the southwest Indian Ocean, derived from X-ray fluorescence core scanning. Eastern South African climate variability on these time scales reflects both the long-term effect of regional insolation changes driven by orbital precession and the effects associated with high-latitude abrupt climate forcing over the past two glacial-interglacial cycles, including millennial-scale events not previously identified. Rapid changes towards more humid conditions in eastern South Africa as the Northern Hemisphere entered phases of extreme cooling were potentially driven by a combination of warming in the Agulhas Current and shifts of the subtropical anticyclones. These climate oscillations appear coherent with other Southern Hemisphere records but are anti-phased with respect to the East Asian Monsoon. Numerical modelling results reveal that higher precipitation in the KwaZulu-Natal province during precession maxima is driven by a combination of increased local evaporation and elevated moisture transport into eastern South Africa from the coast of Mozambique. DA - 2016 DB - OpenUCT DP - University of Cape Town IS - 1 J1 - Scientific Reports LK - https://open.uct.ac.za PY - 2016 SM - 2045-2322 T1 - Eastern South African hydroclimate over the past 270,000 years TI - Eastern South African hydroclimate over the past 270,000 years UR - http://hdl.handle.net/11427/34753 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34753
dc.identifier.vancouvercitationSimon MH, Ziegler M, Bosmans J, Barker S, Reason CJC, Hall IR. Eastern South African hydroclimate over the past 270,000 years. Scientific Reports. 2016;5(1):174 - 177. http://hdl.handle.net/11427/34753.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Oceanography
dc.publisher.facultyFaculty of Science
dc.sourceScientific Reports
dc.source.journalissue1
dc.source.journalvolume5
dc.source.pagination174 - 177
dc.source.urihttps://dx.doi.org/10.1038/srep18153
dc.subject.otherQE Geology
dc.titleEastern South African hydroclimate over the past 270,000 years
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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