Mg/Ca ratios of Globigerinoides ruber of sediment core GeoB4905-4
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2005
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| _version_ | 1867171359482707968 |
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| author | Weldeab, Syee Schneider, Ralph R Kölling, Martin Wefer, Gerold |
| author_facet | Weldeab, Syee Schneider, Ralph R Kölling, Martin Wefer, Gerold |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Here we present evidence that the Holocene African monsoon system (AMS) varied in response to the eastern equatorial Atlantic sea-surface temperature (SST). Several short-term episodes of decreased moisture availability as a result of low eastern equatorial Atlantic SST are suggested by planktonic foraminiferal Mg/Ca ratios. These episodes promoted a weakening of the AMS and thus determined the timing and intensity of arid periods. Local sea-surface salinities also reveal regional patterns of precipitation in equatorial western Africa. The high eastern equatorial Atlantic SSTs occur in concert with seasonally increased insolation at low latitudes, suggesting a strong response of African monsoonal precipitation to oceanic conditions at low latitudes. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_738242 |
| institution | PANGAEA |
| language | en |
| publishDate | 2005 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Mg/Ca ratios of Globigerinoides ruber of sediment core GeoB4905-4 Weldeab, Syee Schneider, Ralph R Kölling, Martin Wefer, Gerold Center for Marine Environmental Sciences; GeoB; GeoB4905-4; Geosciences, University of Bremen; Gravity corer (Kiel type); M41/1; MARUM; Meteor (1986); off Cameroon; SL Here we present evidence that the Holocene African monsoon system (AMS) varied in response to the eastern equatorial Atlantic sea-surface temperature (SST). Several short-term episodes of decreased moisture availability as a result of low eastern equatorial Atlantic SST are suggested by planktonic foraminiferal Mg/Ca ratios. These episodes promoted a weakening of the AMS and thus determined the timing and intensity of arid periods. Local sea-surface salinities also reveal regional patterns of precipitation in equatorial western Africa. The high eastern equatorial Atlantic SSTs occur in concert with seasonally increased insolation at low latitudes, suggesting a strong response of African monsoonal precipitation to oceanic conditions at low latitudes. |
| title | Mg/Ca ratios of Globigerinoides ruber of sediment core GeoB4905-4 |
| topic | Center for Marine Environmental Sciences; GeoB; GeoB4905-4; Geosciences, University of Bremen; Gravity corer (Kiel type); M41/1; MARUM; Meteor (1986); off Cameroon; SL |
| url | https://doi.org/10.1594/PANGAEA.738242 |