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  4. Glacial to Holocene Hydroclimate in Western Africa: Insights from Organic and Major-Element Geochemistry of Hemipelagic Atlantic Ocean Sediments
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-00102404-13

Glacial to Holocene Hydroclimate in Western Africa: Insights from Organic and Major-Element Geochemistry of Hemipelagic Atlantic Ocean Sediments

Veröffentlichungsdatum
2011-10-05
Autoren
Collins, James A  
Betreuer
Wefer, Gerold  
Gutachter
Schulz, Michael  
Zusammenfassung
The distribution of rainfall in Africa during past climates is not well constrained. In particular, many existing proxy reconstructions in Africa are not consistent with North-South migrations of the rainbelt that are seen in other regions. In this thesis, rainfall distribution across western Africa is investigated at key climate states of the past using a transect of hemipelagic marine sediment cores spanning from 21°N to 23°S in the eastern Atlantic Ocean. Stable carbon and hydrogen isotopes of plant leaf wax n-alkanes are interpreted as proxies for vegetation type and the hydrogen isotopic composition of meteoric water, respectively. In semi-arid regions, dust emissions are strongly linked to hydroclimate. As such, major element geochemistry from 4 continuous sediment core records (21°N-9°N) is also investigated in order to reconstruct dust vs river input from West Africa over the last 45kyrs.
Schlagwörter
African Palaeoclimate Geochemistry Isotopes
Institution
Universität Bremen  
Fachbereich
Fachbereich 05: Geowissenschaften (FB 05)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

00102404-1.pdf

Size

16.83 MB

Format

Adobe PDF

Checksum

(MD5):aa31e1775a0eebb27cb0f7a0de3036a3

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