Stable oxygen isotope data of Globigerinoides ruber white and titanium intensity from sediment core GeoB6211-2
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| Sprache: | en |
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PANGAEA
2009
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| author | Chiessi, Cristiano Mazur Mulitza, Stefan Pätzold, Jürgen Wefer, Gerold Marengo, José A |
| author_facet | Chiessi, Cristiano Mazur Mulitza, Stefan Pätzold, Jürgen Wefer, Gerold Marengo, José A |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The South American summer monsoon (SASM) is the main source of precipitation for the most densely populated and agriculturally productive regions of tropical and subtropical South America. Here we investigate the impact of the Atlantic Multidecadal Oscillation (AMO) on the SASM using ~4500 yr long proxy records of the discharge variability of the La Plata River Drainage Basin (PRDB), subtropical South America. We measured the stable oxygen composition of planktic foraminifera (related to the extension of the PRDB plume), and Ti intensity in bulk sediment (related to the source of the terrigenous sediments) from a marine sediment core. Spectral and wavelet analyses of our records indicate an oscillation with period of ~64 yr. We conclude that the observed oscillation reflects variability in the SASM activity associated to the AMO. Sea surface temperature and atmospheric circulation anomalies triggered by the AMO would control the variability in SASM activity. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_729737 |
| institution | PANGAEA |
| language | en |
| publishDate | 2009 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Stable oxygen isotope data of Globigerinoides ruber white and titanium intensity from sediment core GeoB6211-2 Chiessi, Cristiano Mazur Mulitza, Stefan Pätzold, Jürgen Wefer, Gerold Marengo, José A AGE; Argentine Basin; Center for Marine Environmental Sciences; DEPTH, sediment/rock; GeoB6211-2; Globigerinoides ruber white, δ18O; Gravity corer (Kiel type); Isotope ratio mass spectrometry; M46/2; MARUM; Meteor (1986); SL; Titanium; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH) The South American summer monsoon (SASM) is the main source of precipitation for the most densely populated and agriculturally productive regions of tropical and subtropical South America. Here we investigate the impact of the Atlantic Multidecadal Oscillation (AMO) on the SASM using ~4500 yr long proxy records of the discharge variability of the La Plata River Drainage Basin (PRDB), subtropical South America. We measured the stable oxygen composition of planktic foraminifera (related to the extension of the PRDB plume), and Ti intensity in bulk sediment (related to the source of the terrigenous sediments) from a marine sediment core. Spectral and wavelet analyses of our records indicate an oscillation with period of ~64 yr. We conclude that the observed oscillation reflects variability in the SASM activity associated to the AMO. Sea surface temperature and atmospheric circulation anomalies triggered by the AMO would control the variability in SASM activity. |
| title | Stable oxygen isotope data of Globigerinoides ruber white and titanium intensity from sediment core GeoB6211-2 |
| topic | AGE; Argentine Basin; Center for Marine Environmental Sciences; DEPTH, sediment/rock; GeoB6211-2; Globigerinoides ruber white, δ18O; Gravity corer (Kiel type); Isotope ratio mass spectrometry; M46/2; MARUM; Meteor (1986); SL; Titanium; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH) |
| url | https://doi.org/10.1594/PANGAEA.729737 |