A multi-proxy investigation of sediment core GeoB7165-1 and AMS 14C dating points from sediment cores off Conceptión (~ 36°S)
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| Main Authors: | , , , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2010
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| _version_ | 1867171358923816960 |
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| author | Mohtadi, Mahyar Rossel, Pamela E Lange, Carina Beatriz Pantoja, Silvio Böning, Philipp Repeta, Daniel J Grunwald, Maik Lamy, Frank Hebbeln, Dierk Brumsack, Hans-Jürgen |
| author_facet | Mohtadi, Mahyar Rossel, Pamela E Lange, Carina Beatriz Pantoja, Silvio Böning, Philipp Repeta, Daniel J Grunwald, Maik Lamy, Frank Hebbeln, Dierk Brumsack, Hans-Jürgen |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A high-resolution sea surface temperature and paleoproductivity reconstruction on a sedimentary record collected at 36°S off central-south Chile (GeoB 7165-1, 36°33'S, 73°40'W, 797 m water depth, core length 750 cm) indicates that paleoceanographic conditions changed abruptly between 18 and 17 ka. Comparative analysis of several cores along the Chilean continental margin (30°-41°S) suggests that the onset and the pattern of deglacial warming was not uniform off central-south Chile due to the progressive southward migration of the Southern Westerlies and local variations in upwelling. Marine productivity augmented rather abruptly at 13-14 ka, well after the oceanographic changes.We suggest that the late deglacial increase in paleoproductivity off central-south Chile reflects the onset of an active upwelling system bringing nutrient-rich, oxygen-poor Equatorial SubsurfaceWater to the euphotic zone, and a relatively higher nutrient load of the Antarctic Circumpolar Current. During the Last Glacial Maximum, when the Southern Westerlies were located further north, productivity off central-south Chile, in contrast to off northern Chile, was reduced due to direct onshore-blowing winds that prevented coastal upwelling and export production. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_733253 |
| institution | PANGAEA |
| language | en |
| publishDate | 2010 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | A multi-proxy investigation of sediment core GeoB7165-1 and AMS 14C dating points from sediment cores off Conceptión (~ 36°S) Mohtadi, Mahyar Rossel, Pamela E Lange, Carina Beatriz Pantoja, Silvio Böning, Philipp Repeta, Daniel J Grunwald, Maik Lamy, Frank Hebbeln, Dierk Brumsack, Hans-Jürgen Center for Marine Environmental Sciences; CHIPAL; CONDOR-Ia; East Pacific; GeoB3302-1; GeoB3359-3; GeoB7139-2; GeoB7165-1; GIK17748-2; Gravity corer (Kiel type); HOTLINE, HYGAPE; MARUM; off Chile; PUCK; SL; SO101; SO101/3_2-1; SO102/1; SO156/2; SO156/3; SO80_4; SO80a; Sonne; South-East Pacific A high-resolution sea surface temperature and paleoproductivity reconstruction on a sedimentary record collected at 36°S off central-south Chile (GeoB 7165-1, 36°33'S, 73°40'W, 797 m water depth, core length 750 cm) indicates that paleoceanographic conditions changed abruptly between 18 and 17 ka. Comparative analysis of several cores along the Chilean continental margin (30°-41°S) suggests that the onset and the pattern of deglacial warming was not uniform off central-south Chile due to the progressive southward migration of the Southern Westerlies and local variations in upwelling. Marine productivity augmented rather abruptly at 13-14 ka, well after the oceanographic changes.We suggest that the late deglacial increase in paleoproductivity off central-south Chile reflects the onset of an active upwelling system bringing nutrient-rich, oxygen-poor Equatorial SubsurfaceWater to the euphotic zone, and a relatively higher nutrient load of the Antarctic Circumpolar Current. During the Last Glacial Maximum, when the Southern Westerlies were located further north, productivity off central-south Chile, in contrast to off northern Chile, was reduced due to direct onshore-blowing winds that prevented coastal upwelling and export production. |
| title | A multi-proxy investigation of sediment core GeoB7165-1 and AMS 14C dating points from sediment cores off Conceptión (~ 36°S) |
| topic | Center for Marine Environmental Sciences; CHIPAL; CONDOR-Ia; East Pacific; GeoB3302-1; GeoB3359-3; GeoB7139-2; GeoB7165-1; GIK17748-2; Gravity corer (Kiel type); HOTLINE, HYGAPE; MARUM; off Chile; PUCK; SL; SO101; SO101/3_2-1; SO102/1; SO156/2; SO156/3; SO80_4; SO80a; Sonne; South-East Pacific |
| url | https://doi.org/10.1594/PANGAEA.733253 |