Shi, Ning; Schneider, Ralph R; Beug, Hans-Jürgen; Dupont, Lydie M (2001): Pollen analyses of sediment core GeoB1711-4 in the eastern South Atlantic [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.735726, Supplement to: Shi, N et al. (2001): Southeast trade wind variations during the last 135 kyr: evidence from pollen spectra in eastern South Atlantic sediments. Earth and Planetary Science Letters, 187(3-4), 311-321, https://doi.org/10.1016/S0012-821X(01)00267-9
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Abstract:
Influx of aeolian pollen trapped in marine sediments off Namibia provides a wind variation record for the last 135 kyr. The influx of major pollen components is derived from the southwest African desert/semi-desert zone and shows six periods during which enhanced southeast trade winds contributed to strong upwelling and reduced sea surface temperatures. The most prominent of these occurred during 17-23 cal. kyr, 42-56 kyr and before 130 kyr B.P. Correspondence between the pollen influx record and the Vostok deuterium isotope record suggests that pronounced glacial Antarctic cooling was accompanied by intensification of the southeast trades throughout the Late Quaternary. However, during 42-23 kyr B.P. the combination of strong Antarctic glaciation with a decrease of wind zonality induced by low latitude precessional insolation changes caused strong alongshore winds and Ekman pumping that resulted in strong upwelling and reduced sea surface temperatures without pollen influx enhancement.
Project(s):
Coverage:
Latitude: -23.315000 * Longitude: 12.376667
Date/Time Start: 1992-01-11T00:00:00 * Date/Time End: 1992-01-11T00:00:00
Event(s):
GeoB1711-4 (GeoB1711) * Latitude: -23.315000 * Longitude: 12.376667 * Date/Time: 1992-01-11T00:00:00 * Elevation: -1967.0 m * Recovery: 10.66 m * Location: Namibia continental slope * Campaign: M20/2 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: CC: Tonschl., olive, H2S, Foram.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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2 datasets
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Datasets listed in this publication series
- Shi, N; Schneider, RR; Beug, H-J et al. (2001): (Table 1) Age model of sediment core GeoB1711-4. https://doi.org/10.1594/PANGAEA.735724
- Shi, N; Schneider, RR; Beug, H-J et al. (2001): Pollen analysis of sediment core GeoB1711-4. https://doi.org/10.1594/PANGAEA.60895