Linking desert evolution and coastal upwelling; Pliocene climate change in Namibia

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doi: 10.1130/G21401.1
Author(s): Dupont, Lydie M.; Donner, Barbara; Vidal, Laurence; Pérez, Elena M.; Wefer, Gerold
Author Affiliation(s): Primary:
Geosciences University of Bremen, Bremen, Federal Republic of Germany
University of Aix-Marseille III, France
Natural History Museum of Los Angeles County, United States
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 33(6), p.461-464. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. With GSA Data Repository Item 2005087. 36 refs.; illus.
Summary: A late Pliocene high-resolution pollen record from the southeast Atlantic (Ocean Drilling Program Site 1082) registers vegetation development in southwest Africa. The marine record is continuous, ranges from 3.5 to 1.7 Ma, and has a millennial resolution between 2.9 and 1.9 Ma. Changes in climate and vegetation correspond to the Matuyama diatom maximum of the Namibian upwelling system and seem to be highly susceptible to latitudinal shifts in the Polar Front Zone of the Southern Ocean. A northward advance of the polar fronts is connected with an increase in winter rainfall in southwest Africa. Rapid desiccation in Namibia at 2.2 Ma is associated with increasing upwelling and decreasing sea- surface temperatures along the coast.
Year of Publication: 2005
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Africa; Algae; Anomalinidae; Arid environment; Atlantic Ocean; Cassidulinacea; Cenozoic; Cibicidoides; Cibicidoides wuellerstorfi; Climate change; Coastal environment; Deserts; Desiccation; Diatoms; Eolian features; Foraminifera; Globigerinacea; Globorotalia; Globorotalia inflata; Globorotaliidae; Invertebrata; Landform evolution; Leg 175; Microfossils; Miospores; Namib Desert; Namibia; Neogene; ODP Site 1082; ODP Site 1083; Ocean Drilling Program; Paleo-oceanography; Paleocirculation; Paleoclimatology; Paleoecology; Paleohydrology; Palynomorphs; Plantae; Pliocene; Pollen; Pollen analysis; Protista; Rotaliina; Sea-surface temperature; South Atlantic; Southeast Atlantic; Southern Africa; Terrestrial environment; Tertiary; Upwelling; Vegetation
Coordinates: S210539 S210539 E0114914 E0114914
S205342 S205342 E0111304 E0111304
Record ID: 2005037564
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States