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- Norström, ElinStockholms universitet,Institutionen för geologiska vetenskaper (author)
Late-Holocene climate and vegetation dynamics in eastern Lesotho highlands
- Article/chapterEnglish2018
Publisher, publication year, extent ...
- 2018-06-26
- SAGE Publications,2018
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:su-160167
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-160167URI
- https://doi.org/10.1177/0959683618777054DOI
- https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-151769URI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- 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.
Subject headings and genre
- NATURVETENSKAP Geovetenskap och miljövetenskap hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences hsv//eng
- NATURVETENSKAP Geovetenskap och miljövetenskap Naturgeografi hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Physical Geography hsv//eng
- carbon isotope composition
- geochemistry
- Lesotho
- palaeoclimate
- palaeohydrology
- palaeovegetation
- Southern Africa
- XRF
Added entries (persons, corporate bodies, meetings, titles ...)
- Bringensparr, CarolineStockholms universitet,Institutionen för geologiska vetenskaper(Swepub:su)cabr6275 (author)
- Fitchett, Jennifer M. (author)
- Grab, Stefan W. (author)
- Rydberg, Johan,1976-Umeå universitet,Institutionen för ekologi, miljö och geovetenskap(Swepub:umu)jonryg02 (author)
- Kylander, MalinStockholms universitet,Institutionen för geologiska vetenskaper(Swepub:su)mkyla (author)
- Stockholms universitetInstitutionen för geologiska vetenskaper (creator_code:org_t)
Related titles
- In:The Holocene: SAGE Publications28:9, s. 1483-14940959-68361477-0911
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