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Environmental varia...
Environmental variability in northern Tanzania from AD 1000 to 1800, as inferred from diatoms and pollen in Lake Duluti
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- Öberg, Helena (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Norström, Elin (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Ryner, Maria Malmström (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Holmgren, Karin (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Westerberg, Lars-Ove (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Risberg, Jan (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Eddudottir, Sigrun Dogg (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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Andersen, Thorbjörn J. (author)
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Muzuka, Alfred (author)
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(creator_code:org_t)
- Elsevier BV, 2013
- 2013
- English.
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In: Palaeogeography, Palaeoclimatology, Palaeoecology. - : Elsevier BV. - 0031-0182 .- 1872-616X. ; 374, s. 230-241
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Fossil pollen and diatoms have been analyzed in a sediment sequence from a topographically closed crater lake in northern Tanzania (Lake Duluti), with the aim to reconstruct past changes in lake level and vegetation dynamics. The results provide a new paleoenvironmental record from equatorial Africa covering the period c. AD 1000 to AD 1800. Overall, the pollen and diatom records generate comparable stories of dry and wet periods. Dry conditions are inferred at c. AD 1040-1470, c. AD 1510-1640 and C. AD 1650-1670 with the lowest lake levels at c. AD 1260-1290 and AD 1600-1640. Wetter conditions occurred c. AD 1640-1650 and c. AD 1670-1790. The chronology is based on combined analyses of Pb-210 activity and AMS C-14 on bulk sediment, and a Bayesian model was applied to establish the age-depth relationship. The hydroclimatic record from Lake Duluti shows good correlation with several East African lakes in a centennial time perspective, although comparison of high frequency variability in the region is hampered by dating uncertainties.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)
Keyword
- Diatoms
- Pollen
- Crater lake
- Tanzania
- Paleolimnology
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Öberg, Helena
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Norström, Elin
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Ryner, Maria Mal ...
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Holmgren, Karin
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Westerberg, Lars ...
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Risberg, Jan
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Eddudottir, Sigr ...
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Andersen, Thorbj ...
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Muzuka, Alfred
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Physical Geograp ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geosciences Mult ...
- Articles in the publication
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Palaeogeography, ...
- By the university
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Stockholm University