Temperature and salinity reconstruction for sediment core GeoB3313-1
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2002
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| _version_ | 1867168554638376960 |
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| author | Lamy, Frank Rühlemann, Carsten Hebbeln, Dierk Wefer, Gerold |
| author_facet | Lamy, Frank Rühlemann, Carsten Hebbeln, Dierk Wefer, Gerold |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We reconstructed changes of temperature, salinity, and productivity within the southern Peru-Chile Current during the last 8000 years from a high-resolution sediment core recovered at 41°S using alkenones, isotope ratios of planktic foraminifera, biogenic opal, and organic carbon. Paleotemperatures and paleosalinities reached maximum values at ~5500 years ago and thereafter declined to modern values, whereas paleoproductivity continuously increased throughout the last 8000 years. We ascribe these long-term Holocene trends primarily to latitudinal shifts of the Antarctic Circumpolar Current (ACC). The concurrence with shifts in the position of the Southern Westerlies points to a common response of atmospheric and oceanographic circulation patterns off southern Chile. Millennial- to centennial-scale fluctuations of paleotemperatures and paleosalinities, on the other hand, lag displacements in the position of the Southern Westerlies but reveal a significant correlation to short-term temperature changes in Antarctica, indicating a high-latitude control of the ACC at these timescales. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_735166 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Temperature and salinity reconstruction for sediment core GeoB3313-1 Lamy, Frank Rühlemann, Carsten Hebbeln, Dierk Wefer, Gerold CHIPAL; GeoB; GeoB3313-1; Geosciences, University of Bremen; GHOST; Gravity corer (Kiel type); SL; SO102/1; Sonne; South-East Pacific We reconstructed changes of temperature, salinity, and productivity within the southern Peru-Chile Current during the last 8000 years from a high-resolution sediment core recovered at 41°S using alkenones, isotope ratios of planktic foraminifera, biogenic opal, and organic carbon. Paleotemperatures and paleosalinities reached maximum values at ~5500 years ago and thereafter declined to modern values, whereas paleoproductivity continuously increased throughout the last 8000 years. We ascribe these long-term Holocene trends primarily to latitudinal shifts of the Antarctic Circumpolar Current (ACC). The concurrence with shifts in the position of the Southern Westerlies points to a common response of atmospheric and oceanographic circulation patterns off southern Chile. Millennial- to centennial-scale fluctuations of paleotemperatures and paleosalinities, on the other hand, lag displacements in the position of the Southern Westerlies but reveal a significant correlation to short-term temperature changes in Antarctica, indicating a high-latitude control of the ACC at these timescales. |
| title | Temperature and salinity reconstruction for sediment core GeoB3313-1 |
| topic | CHIPAL; GeoB; GeoB3313-1; Geosciences, University of Bremen; GHOST; Gravity corer (Kiel type); SL; SO102/1; Sonne; South-East Pacific |
| url | https://doi.org/10.1594/PANGAEA.735166 |