A high-resolution proxy record of rainfall and ENSO since AD 1550 from layering in stalagmites from Anjohibe Cave, Madagascar
Two stalagmites from Anjohibe Cave have annual layers made up of inclusion-rich calcite over inclusion-free calcite or of darker aragonite over clear aragonite. Geochemical evidence indicates that the basal units are deposited slowly in the wet season and the upper units more rapidly in the dry seas...
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ftcarletonunivir:oai:carleton.ca:1511 2023-05-15T16:38:16+02:00 A high-resolution proxy record of rainfall and ENSO since AD 1550 from layering in stalagmites from Anjohibe Cave, Madagascar Brook, G.A. (George A.) Rafter, M.A. (Margaret A.) Railsback, L.B. (L. Bruce) Sheen, S.-W. (Shaw-Wen) Lundberg, J. (Joyce) 1999-01-01 https://ir.library.carleton.ca/pub/1511 en eng https://ir.library.carleton.ca/pub/1511 Holocene vol. 9 no. 6, pp. 695-705 Annual layers Caves ENSO Madagascar Palaeoclimates Speleothems info:eu-repo/semantics/article 1999 ftcarletonunivir 2022-02-06T21:51:50Z Two stalagmites from Anjohibe Cave have annual layers made up of inclusion-rich calcite over inclusion-free calcite or of darker aragonite over clear aragonite. Geochemical evidence indicates that the basal units are deposited slowly in the wet season and the upper units more rapidly in the dry season. For the period with rainfall and temperature data (AD 1951-1992), layer thickness correlates well with the Southern Oscillation Index (SOI), as well as rainfall, water surplus, and actual evapotranspiration (AET) at nearby Majunga. Comparison of the layer record for one stalagmite with 1866-1994 SOI data indicates that layer thickness correlates best with the frequency and intensity of warm, low-phase SO (El Nino) events, not with average SOI conditions. In addition, the 415-year layer thickness time-series from that speleothem agrees remarkably well with historical records of El Nino frequency, with Galapagos (Ecuador) coral records of sea-surface temperature in the eastern Pacific, and with accumulation rates on the Quelccaya Ice Cap of Peru, which are lower at times of high El Nino frequency. Article in Journal/Newspaper Ice cap Carleton University's Institutional Repository Galapagos Pacific Soi ENVELOPE(30.704,30.704,66.481,66.481) |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
topic |
Annual layers Caves ENSO Madagascar Palaeoclimates Speleothems |
spellingShingle |
Annual layers Caves ENSO Madagascar Palaeoclimates Speleothems Brook, G.A. (George A.) Rafter, M.A. (Margaret A.) Railsback, L.B. (L. Bruce) Sheen, S.-W. (Shaw-Wen) Lundberg, J. (Joyce) A high-resolution proxy record of rainfall and ENSO since AD 1550 from layering in stalagmites from Anjohibe Cave, Madagascar |
topic_facet |
Annual layers Caves ENSO Madagascar Palaeoclimates Speleothems |
description |
Two stalagmites from Anjohibe Cave have annual layers made up of inclusion-rich calcite over inclusion-free calcite or of darker aragonite over clear aragonite. Geochemical evidence indicates that the basal units are deposited slowly in the wet season and the upper units more rapidly in the dry season. For the period with rainfall and temperature data (AD 1951-1992), layer thickness correlates well with the Southern Oscillation Index (SOI), as well as rainfall, water surplus, and actual evapotranspiration (AET) at nearby Majunga. Comparison of the layer record for one stalagmite with 1866-1994 SOI data indicates that layer thickness correlates best with the frequency and intensity of warm, low-phase SO (El Nino) events, not with average SOI conditions. In addition, the 415-year layer thickness time-series from that speleothem agrees remarkably well with historical records of El Nino frequency, with Galapagos (Ecuador) coral records of sea-surface temperature in the eastern Pacific, and with accumulation rates on the Quelccaya Ice Cap of Peru, which are lower at times of high El Nino frequency. |
format |
Article in Journal/Newspaper |
author |
Brook, G.A. (George A.) Rafter, M.A. (Margaret A.) Railsback, L.B. (L. Bruce) Sheen, S.-W. (Shaw-Wen) Lundberg, J. (Joyce) |
author_facet |
Brook, G.A. (George A.) Rafter, M.A. (Margaret A.) Railsback, L.B. (L. Bruce) Sheen, S.-W. (Shaw-Wen) Lundberg, J. (Joyce) |
author_sort |
Brook, G.A. (George A.) |
title |
A high-resolution proxy record of rainfall and ENSO since AD 1550 from layering in stalagmites from Anjohibe Cave, Madagascar |
title_short |
A high-resolution proxy record of rainfall and ENSO since AD 1550 from layering in stalagmites from Anjohibe Cave, Madagascar |
title_full |
A high-resolution proxy record of rainfall and ENSO since AD 1550 from layering in stalagmites from Anjohibe Cave, Madagascar |
title_fullStr |
A high-resolution proxy record of rainfall and ENSO since AD 1550 from layering in stalagmites from Anjohibe Cave, Madagascar |
title_full_unstemmed |
A high-resolution proxy record of rainfall and ENSO since AD 1550 from layering in stalagmites from Anjohibe Cave, Madagascar |
title_sort |
high-resolution proxy record of rainfall and enso since ad 1550 from layering in stalagmites from anjohibe cave, madagascar |
publishDate |
1999 |
url |
https://ir.library.carleton.ca/pub/1511 |
long_lat |
ENVELOPE(30.704,30.704,66.481,66.481) |
geographic |
Galapagos Pacific Soi |
geographic_facet |
Galapagos Pacific Soi |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
Holocene vol. 9 no. 6, pp. 695-705 |
op_relation |
https://ir.library.carleton.ca/pub/1511 |
_version_ |
1766028545195245568 |