(Table 2) Age determination of sediment cores from the Portuguese Margin
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2014
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| _version_ | 1867168152713953280 |
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| author | Rogerson, Mike Rohling, Eelco J Weaver, Philip PE |
| author_facet | Rogerson, Mike Rohling, Eelco J Weaver, Philip PE |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We demonstrate that changes in the behavior of the Mediterranean Outflow Water (MOW) prior to and through the last deglaciation played an important role in promoting Meridional Overturning Circulation (MOC). Estimation of past MOW salt and heat fluxes indicates that they gradually increased through the last deglaciation. Between 17.5 and 14.6 thousand years ago (ka B.P., where B.P. references year 1950), net evaporation from the Mediterranean exported sufficient fresh water from the North Atlantic catchment to cause an average salinity increase of 0.5 psu throughout the upper 2000 m of the entire North Atlantic to the north of 25°N. Combined with rapid intensification and shoaling of the MOW plume, which we identify around 15-14.5 ka B.P., this deglacial MOW-related salt accumulation preconditioned the North Atlantic for abrupt resumption of the MOC at 14.6 ka B.P. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_833682 |
| institution | PANGAEA |
| language | en |
| publishDate | 2014 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 2) Age determination of sediment cores from the Portuguese Margin Rogerson, Mike Rohling, Eelco J Weaver, Philip PE Age, 14C AMS; Age, 14C milieu/reservoir corrected (-400 yr); Age, dated; Age, dated, standard deviation; Calendar age; D13686; D13896; D13900; D249; DEPTH, sediment/rock; Discovery (1962); Elevation of event; Event label; Laboratory code/label; Latitude of event; Longitude of event; PC; Piston corer; Portuguese Margin We demonstrate that changes in the behavior of the Mediterranean Outflow Water (MOW) prior to and through the last deglaciation played an important role in promoting Meridional Overturning Circulation (MOC). Estimation of past MOW salt and heat fluxes indicates that they gradually increased through the last deglaciation. Between 17.5 and 14.6 thousand years ago (ka B.P., where B.P. references year 1950), net evaporation from the Mediterranean exported sufficient fresh water from the North Atlantic catchment to cause an average salinity increase of 0.5 psu throughout the upper 2000 m of the entire North Atlantic to the north of 25°N. Combined with rapid intensification and shoaling of the MOW plume, which we identify around 15-14.5 ka B.P., this deglacial MOW-related salt accumulation preconditioned the North Atlantic for abrupt resumption of the MOC at 14.6 ka B.P. |
| title | (Table 2) Age determination of sediment cores from the Portuguese Margin |
| topic | Age, 14C AMS; Age, 14C milieu/reservoir corrected (-400 yr); Age, dated; Age, dated, standard deviation; Calendar age; D13686; D13896; D13900; D249; DEPTH, sediment/rock; Discovery (1962); Elevation of event; Event label; Laboratory code/label; Latitude of event; Longitude of event; PC; Piston corer; Portuguese Margin |
| url | https://doi.org/10.1594/PANGAEA.833682 |