umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Late-Holocene climate and vegetation dynamics in eastern Lesotho highlands
Show others and affiliations
2018 (English)In: The Holocene, ISSN 0959-6836, E-ISSN 1477-0911, Vol. 28, no 9, p. 1483-1494Article in journal (Refereed) Published
Abstract [en]

The eastern Lesotho highlands are of considerable hydrological importance to southern Africa as a so-called water tower' for the surrounding region. Here, we contribute proxy-data inferring climate and vegetation changes over the past 1600 years, assessing in parallel inorganic and organic chemical analyses on a sediment core from Ladybird wetland, eastern Lesotho. Several proxies were used to determine changes in local vegetation dynamics, productivity, hydrology ((13) C, (15) N, C/N, TOC) and the input and source of the detrital components (Ca/Ti, CIA). The first part of the multi-proxy record (AD 400-800) shows stable terrestrial conditions and low detrital input, followed by higher variability in almost all proxies between ca. AD 900 and 1200. The (13) C record infers a higher proportion of C-4 vegetation, tentatively associated with higher temperatures during this phase, coeval with the Medieval Climate Anomaly (MCA). After AD 1200, local conditions change gradually from purely terrestrial, towards the typical wetland environment prevailing today. A higher proportion of C-3 plants and possibly an increase in aquatic organisms within the organic matrix corresponds with decreasing detrital input, suggesting locally high available moisture in this part of Lesotho during the Little Ice Age (LIA). Although age-model constraints impedes a robust regional comparison, the inferred climate variability is discussed as a tentative response to enhanced mid-latitude cyclonic activity during LIA, and the variable MCA climate conditions as indirectly dictated by changes in solar activity.

Place, publisher, year, edition, pages
Sage Publications, 2018. Vol. 28, no 9, p. 1483-1494
Keywords [en]
carbon isotope composition, geochemistry, Lesotho, palaeoclimate, palaeohydrology, palaeovegetation, Southern Africa, XRF
National Category
Physical Geography
Identifiers
URN: urn:nbn:se:umu:diva-151769DOI: 10.1177/0959683618777054ISI: 000443315700009OAI: oai:DiVA.org:umu-151769DiVA, id: diva2:1250037
Funder
Swedish Research Council, 48-2013-6241Available from: 2018-09-21 Created: 2018-09-21 Last updated: 2018-09-21Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

Rydberg, Johan

Search in DiVA

By author/editor
Rydberg, Johan
By organisation
Department of Ecology and Environmental Sciences
In the same journal
The Holocene
Physical Geography

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 115 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf