PelletierChetelatBlarquezEtAl2020

Référence

Pelletier, N., Chételat, J., Blarquez, O., Vermaire, J.C. (2020) Paleolimnological Assessment of Wildfire-Derived Atmospheric Deposition of Trace Metal(loid)s and Major Ions to Subarctic Lakes (Northwest Territories, Canada). Journal of Geophysical Research: Biogeosciences, 125(8). (Scopus )

Résumé

Wildfires release terrestrial elements to the atmosphere as aerosols, and these events are becoming more frequent and intense in the Arctic boreal forest as the climate is warming. We quantified the impact of atmospheric deposition of aerosols from local wildfires on metal(loid) fluxes using macroscopic charcoal accumulation rates, historical fire mapping, and element concentrations in 210Pb-dated lake sediment from five subarctic lakes with small catchments. Lake sediments showed small but significant increases in fluxes (median = 5–10%) for 22 trace metals, metalloids, or major ions following fire events. The impact of wildfire aerosols on element fluxes was mostly due to short-term (≤2 years) increasing sedimentation rate (6 ± 41% increase), whereas sediment element concentrations were not strongly impacted. Wildfire-associated deposition to lake sediments was mainly composed of Ca, Al, Fe, Mg, K, Mn, and Na, which are major constituents of ash from burned biomass, but changes in sediment flux were greatest for Sb, As, Ni, Ba, Mn, Mo, and Sr compared to pre-disturbance conditions. Compared to anthropogenic sources of pollution, wildfire-associated atmospheric fluxes of metal contaminants to the lakes (e.g., Hg, Pb, As, Sb, and Cd) were low. This study provides quantitative estimates of wildfire impacts on atmospheric geochemical fluxes to subarctic lakes, which can be used for modeling larger-scale impacts under changing fire regimes. ©2020 Her Majesty the Queen in Right of Canada. Journal of Geophysical Research: Biogeosciences © 2020 American Geophysical Union Reproduced with the permission of the Minister of Environment and Climate Change Canada.

Format EndNote

Vous pouvez importer cette référence dans EndNote.

Format BibTeX-CSV

Vous pouvez importer cette référence en format BibTeX-CSV.

Format BibTeX

Vous pouvez copier l'entrée BibTeX de cette référence ci-bas, ou l'importer directement dans un logiciel tel que JabRef .

@ARTICLE { PelletierChetelatBlarquezEtAl2020,
    AUTHOR = { Pelletier, N. and Chételat, J. and Blarquez, O. and Vermaire, J.C. },
    JOURNAL = { Journal of Geophysical Research: Biogeosciences },
    TITLE = { Paleolimnological Assessment of Wildfire-Derived Atmospheric Deposition of Trace Metal(loid)s and Major Ions to Subarctic Lakes (Northwest Territories, Canada) },
    YEAR = { 2020 },
    NOTE = { cited By 0 },
    NUMBER = { 8 },
    VOLUME = { 125 },
    ABSTRACT = { Wildfires release terrestrial elements to the atmosphere as aerosols, and these events are becoming more frequent and intense in the Arctic boreal forest as the climate is warming. We quantified the impact of atmospheric deposition of aerosols from local wildfires on metal(loid) fluxes using macroscopic charcoal accumulation rates, historical fire mapping, and element concentrations in 210Pb-dated lake sediment from five subarctic lakes with small catchments. Lake sediments showed small but significant increases in fluxes (median = 5–10%) for 22 trace metals, metalloids, or major ions following fire events. The impact of wildfire aerosols on element fluxes was mostly due to short-term (≤2 years) increasing sedimentation rate (6 ± 41% increase), whereas sediment element concentrations were not strongly impacted. Wildfire-associated deposition to lake sediments was mainly composed of Ca, Al, Fe, Mg, K, Mn, and Na, which are major constituents of ash from burned biomass, but changes in sediment flux were greatest for Sb, As, Ni, Ba, Mn, Mo, and Sr compared to pre-disturbance conditions. Compared to anthropogenic sources of pollution, wildfire-associated atmospheric fluxes of metal contaminants to the lakes (e.g., Hg, Pb, As, Sb, and Cd) were low. This study provides quantitative estimates of wildfire impacts on atmospheric geochemical fluxes to subarctic lakes, which can be used for modeling larger-scale impacts under changing fire regimes. ©2020 Her Majesty the Queen in Right of Canada. Journal of Geophysical Research: Biogeosciences © 2020 American Geophysical Union Reproduced with the permission of the Minister of Environment and Climate Change Canada. },
    AFFILIATION = { Geography and Environmental Studies, Carleton University, Ottawa, ON, Canada; Environment and Climate Change Canada, National Wildlife Research Centre, Ottawa, ON, Canada; Département de Géographie, Université de Montréal, Montréal, QC, Canada; Institute for Environmental and Interdisciplinary Sciences, Carleton University, Ottawa, ON, Canada },
    ART_NUMBER = { e2020JG005720 },
    AUTHOR_KEYWORDS = { aerosol; charcoal; lead; mercury; remobilization; sediment },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1029/2020JG005720 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089895174&doi=10.1029%2f2020JG005720&partnerID=40&md5=2e53f6e1e62b8b47f747afd4026a1e82 },
}

********************************************************** *************************** FRQNT ************************ **********************************************************

Le CEF est un
regroupement stratégique du

********************************************************** *********************** Infolettre *********************** **********************************************************

Abonnez-vous à
l'Infolettre du CEF!

********************************************************** ***************** Pub - Chenilles espionnes ****************** **********************************************************

**********************************************************

***************** Pub - Symphonies_Boreales ****************** **********************************************************

********************************************************** ***************** Boîte à trucs *************** **********************************************************

CEF-Référence
La référence vedette !

  • Voici une liste (clairement incomplète) des packages R axés sur l'écologie! N'hésitez pas à ajouter à la liste

Voir les autres...