A continuous biomass‐burning record based on the fire biomarker levoglucosan of sediment core GeoB9528-3

DOI

Biomass burning on the African continent is widespread and interactions with climate, vegetation dynamics and biogeochemical cycling are complex. To obtain a better understanding of these complex relationships, African fire history has been widely studied, although mostly on relatively short time-scales (i.e. yrs to kyrs) and less commonly on long-term scales. Here, we present a 192-kyr, continuous biomass-burning record from sub-Saharan Northwest Africa based on the fire biomarker levoglucosan in a marine sediment core offshore Guinea. Notable features of our record include an increase in levoglucosan accumulation at 80 ka and two peaks at 50-60 ka. The event at 80 ka is likely related to an overall increase in sedimentation rates rather than an increase in biomass burning in the Northwest African savanna region. Our record indicates that glacial/interglacial changes in regional climate and vegetation composition (C3 vs. C4 plants) were not a major influence on biomass burning over the last 192 kyrs. However, we suggest that the burning events at 50-60 ka might be caused by increased occurrence of C3 vegetation and human settlement in this region. At this time, the savanna region became wetter and fuel loads likely increased. Therefore, the region was more hospitable for humans, who likely used fire for hunting activities. Collectively, we hypothesize that on longer (glacial/interglacial) timescales, biomass burning, regional climate and African vegetation are not necessarily coupled, while around 50-60 ka, higher fuel loads and human fire-use may have influenced fire occurrence in sub-Saharan Northwest Africa.

Supplement to: Schreuder, Laura T; Hopmans, Ellen C; Castañeda, Isla S; Schefuß, Enno; Mulitza, Stefan; Sinninghe Damsté, Jaap S; Schouten, Stefan (2019): Late Quaternary biomass burning in Northwest Africa and interactions with climate, vegetation, and humans. Paleoceanography and Paleoclimatology, 34(2), 153-163

Identifier
DOI https://doi.org/10.1594/PANGAEA.901739
Related Identifier IsSupplementTo https://doi.org/10.1029/2018PA003467
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.901739
Provenance
Creator Schreuder, Laura T; Hopmans, Ellen C ORCID logo; Castañeda, Isla S ORCID logo; Schefuß, Enno (ORCID: 0000-0002-5960-930X); Mulitza, Stefan ORCID logo; Sinninghe Damsté, Jaap S ORCID logo; Schouten, Stefan
Publisher PANGAEA
Publication Year 2019
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline History; Humanities
Spatial Coverage (-17.663 LON, 9.166 LAT)