Five thousand years of fire history in the high North Atlantic region: natural variability and ancient human forcing
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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Five thousand years of fire history in the high North Atlantic region : natural variability and ancient human forcing. / Segato, Delia; Villoslada Hidalgo, Maria Del Carmen; Edwards, Ross; Barbaro, Elena; Vallelonga, Paul; Kjaer, Helle Astrid; Simonsen, Marius; Vinther, Bo; Maffezzoli, Niccolo; Zangrando, Roberta; Turetta, Clara; Battistel, Dario; Vesteinsson, Orri; Barbante, Carlo; Spolaor, Andrea.
I: Climate of the Past, Bind 17, Nr. 4, 20.07.2021, s. 1533-1545.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Five thousand years of fire history in the high North Atlantic region
T2 - natural variability and ancient human forcing
AU - Segato, Delia
AU - Villoslada Hidalgo, Maria Del Carmen
AU - Edwards, Ross
AU - Barbaro, Elena
AU - Vallelonga, Paul
AU - Kjaer, Helle Astrid
AU - Simonsen, Marius
AU - Vinther, Bo
AU - Maffezzoli, Niccolo
AU - Zangrando, Roberta
AU - Turetta, Clara
AU - Battistel, Dario
AU - Vesteinsson, Orri
AU - Barbante, Carlo
AU - Spolaor, Andrea
PY - 2021/7/20
Y1 - 2021/7/20
N2 - 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.
AB - 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.
KW - ICE-CORE RECORD
KW - BLACK CARBON
KW - ATMOSPHERIC LIFETIME
KW - CHARCOAL RECORDS
KW - HOLOCENE
KW - CLIMATE
KW - LEVOGLUCOSAN
KW - GREENLAND
KW - EASTERN
KW - EUROPE
U2 - 10.5194/cp-17-1533-2021
DO - 10.5194/cp-17-1533-2021
M3 - Journal article
VL - 17
SP - 1533
EP - 1545
JO - Climate of the Past
JF - Climate of the Past
SN - 1814-9324
IS - 4
ER -
ID: 276161890