Five thousand years of fire history in the high North Atlantic region: natural variability and ancient human forcing

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  • Delia Segato
  • Maria Del Carmen Villoslada Hidalgo
  • Ross Edwards
  • Elena Barbaro
  • Paul Vallelonga
  • Kjær, Helle Astrid
  • Marius Simonsen
  • Vinther, Bo Møllesøe
  • Niccolo Maffezzoli
  • Roberta Zangrando
  • Clara Turetta
  • Dario Battistel
  • Orri Vesteinsson
  • Carlo Barbante
  • Andrea Spolaor

Biomass burning influences global atmospheric chemistry by releasing greenhouse gases and climate-forcing aerosols. There is controversy about the magnitude and timing of Holocene changes in biomass burning emissions from millennial to centennial timescales and, in particular, about the possible impact of ancient civilizations. Here we present a 5 kyr record of fire activity proxies levoglucosan, black carbon, and ammonium measured in the RECAP (Renland ice cap) ice core, drilled in coastal eastern Greenland, and therefore affected by processes occurring in the high North Atlantic region. Levoglucosan and ammonium fluxes are high from 5 to 4.5 kyr BP (thousand years before 2000 CE) followed by an abrupt decline, possibly due to monotonic decline in Northern Hemisphere summer insolation. Levoglucosan and black carbon show an abrupt decline at 1.1 kyr BP, suggesting a decline in the wildfire regime in Iceland due to the extensive land clearing caused by Viking colonizers. All fire proxies reach a minimum during the second half of the last century, after which levoglucosan and ammonium fluxes increase again, in particular over the last 200 years. We find that the fire regime reconstructed from RECAP fluxes seems mainly related to climatic changes; however over the last mil-lennium human activities might have influenced wildfire frequency/occurrence substantially.

Original languageEnglish
JournalClimate of the Past
Volume17
Issue number4
Pages (from-to)1533-1545
Number of pages13
ISSN1814-9324
DOIs
Publication statusPublished - 20 Jul 2021

    Research areas

  • ICE-CORE RECORD, BLACK CARBON, ATMOSPHERIC LIFETIME, CHARCOAL RECORDS, HOLOCENE, CLIMATE, LEVOGLUCOSAN, GREENLAND, EASTERN, EUROPE

ID: 276161890