XRF-scanned elemental concentrations from sediment cores off Peru
We present a high-resolution marine record of sediment input from the Guayas River, Ecuador, that reflects changes in precipitation along western equatorial South America during the last 18ka. We use log (Ti/Ca) derived from X-ray Fluorescence (XRF) to document terrigenous input from riverine runoff...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.824573 2024-09-15T18:22:53+00:00 XRF-scanned elemental concentrations from sediment cores off Peru Mollier-Vogel, Elfi Leduc, Guillaume Böschen, Tebke Martinez, Philippe Schneider, Ralph R MEDIAN LATITUDE: -3.850000 * MEDIAN LONGITUDE: -81.222600 * SOUTH-BOUND LATITUDE: -3.950167 * WEST-BOUND LONGITUDE: -81.320500 * NORTH-BOUND LATITUDE: -3.749833 * EAST-BOUND LONGITUDE: -81.124700 * DATE/TIME START: 2008-12-11T21:15:00 * DATE/TIME END: 2008-12-12T13:08:00 2013 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.824573 https://doi.org/10.1594/PANGAEA.824573 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.824573 https://doi.org/10.1594/PANGAEA.824573 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Mollier-Vogel, Elfi; Leduc, Guillaume; Böschen, Tebke; Martinez, Philippe; Schneider, Ralph R (2013): Rainfall response to orbital and millennial forcing in northern Peru over the last 18 ka. Quaternary Science Reviews, 76, 29-38, https://doi.org/10.1016/j.quascirev.2013.06.021 Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754 dataset publication series 2013 ftpangaea https://doi.org/10.1594/PANGAEA.82457310.1016/j.quascirev.2013.06.021 2024-07-24T02:31:21Z We present a high-resolution marine record of sediment input from the Guayas River, Ecuador, that reflects changes in precipitation along western equatorial South America during the last 18ka. We use log (Ti/Ca) derived from X-ray Fluorescence (XRF) to document terrigenous input from riverine runoff that integrates rainfall from the Guayas River catchment. We find that rainfall-induced riverine runoff has increased during the Holocene and decreased during the last deglaciation. Superimposed on those long-term trends, we find that rainfall was probably slightly increased during the Younger Dryas, while the Heinrich event 1 was marked by an extreme load of terrigenous input, probably reflecting one of the wettest period over the time interval studied. When we compare our results to other Deglacial to Holocene rainfall records located across the tropical South American continent, different modes of variability become apparent. The records of rainfall variability imply that changes in the hydrological cycle at orbital and sub-orbital timescales were different from western to eastern South America. Orbital forcing caused an antiphase behavior in rainfall trends between eastern and western equatorial South America. In contrast, millennial-scale rainfall changes, remotely connected to the North Atlantic climate variability, led to homogenously wetter conditions over eastern and western equatorial South America during North Atlantic cold spells. These results may provide helpful diagnostics for testing the regional rainfall sensitivity in climate models and help to refine rainfall projections in South America for the next century. Other/Unknown Material North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-81.320500,-81.124700,-3.749833,-3.950167) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754 |
spellingShingle |
Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754 Mollier-Vogel, Elfi Leduc, Guillaume Böschen, Tebke Martinez, Philippe Schneider, Ralph R XRF-scanned elemental concentrations from sediment cores off Peru |
topic_facet |
Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754 |
description |
We present a high-resolution marine record of sediment input from the Guayas River, Ecuador, that reflects changes in precipitation along western equatorial South America during the last 18ka. We use log (Ti/Ca) derived from X-ray Fluorescence (XRF) to document terrigenous input from riverine runoff that integrates rainfall from the Guayas River catchment. We find that rainfall-induced riverine runoff has increased during the Holocene and decreased during the last deglaciation. Superimposed on those long-term trends, we find that rainfall was probably slightly increased during the Younger Dryas, while the Heinrich event 1 was marked by an extreme load of terrigenous input, probably reflecting one of the wettest period over the time interval studied. When we compare our results to other Deglacial to Holocene rainfall records located across the tropical South American continent, different modes of variability become apparent. The records of rainfall variability imply that changes in the hydrological cycle at orbital and sub-orbital timescales were different from western to eastern South America. Orbital forcing caused an antiphase behavior in rainfall trends between eastern and western equatorial South America. In contrast, millennial-scale rainfall changes, remotely connected to the North Atlantic climate variability, led to homogenously wetter conditions over eastern and western equatorial South America during North Atlantic cold spells. These results may provide helpful diagnostics for testing the regional rainfall sensitivity in climate models and help to refine rainfall projections in South America for the next century. |
format |
Other/Unknown Material |
author |
Mollier-Vogel, Elfi Leduc, Guillaume Böschen, Tebke Martinez, Philippe Schneider, Ralph R |
author_facet |
Mollier-Vogel, Elfi Leduc, Guillaume Böschen, Tebke Martinez, Philippe Schneider, Ralph R |
author_sort |
Mollier-Vogel, Elfi |
title |
XRF-scanned elemental concentrations from sediment cores off Peru |
title_short |
XRF-scanned elemental concentrations from sediment cores off Peru |
title_full |
XRF-scanned elemental concentrations from sediment cores off Peru |
title_fullStr |
XRF-scanned elemental concentrations from sediment cores off Peru |
title_full_unstemmed |
XRF-scanned elemental concentrations from sediment cores off Peru |
title_sort |
xrf-scanned elemental concentrations from sediment cores off peru |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.824573 https://doi.org/10.1594/PANGAEA.824573 |
op_coverage |
MEDIAN LATITUDE: -3.850000 * MEDIAN LONGITUDE: -81.222600 * SOUTH-BOUND LATITUDE: -3.950167 * WEST-BOUND LONGITUDE: -81.320500 * NORTH-BOUND LATITUDE: -3.749833 * EAST-BOUND LONGITUDE: -81.124700 * DATE/TIME START: 2008-12-11T21:15:00 * DATE/TIME END: 2008-12-12T13:08:00 |
long_lat |
ENVELOPE(-81.320500,-81.124700,-3.749833,-3.950167) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Mollier-Vogel, Elfi; Leduc, Guillaume; Böschen, Tebke; Martinez, Philippe; Schneider, Ralph R (2013): Rainfall response to orbital and millennial forcing in northern Peru over the last 18 ka. Quaternary Science Reviews, 76, 29-38, https://doi.org/10.1016/j.quascirev.2013.06.021 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.824573 https://doi.org/10.1594/PANGAEA.824573 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.82457310.1016/j.quascirev.2013.06.021 |
_version_ |
1810462933254144000 |