Temporally delineated sources of major chemical species in high Arctic snow

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Katrina M Macdonald
  • Sangeeta Sharma
  • Desiree Toom
  • Alina Chivulescu
  • Andrew Platt
  • Mike Elsasser
  • Lin Huang
  • Richard Leaitch
  • Nathan Chellman
  • Joseph R McConnell
  • Heiko Bozem
  • Daniel Kunkel
  • Ying Duan Lei
  • Cheol-Heon Jeong
  • Jonathan PD Abbatt
  • Greg J Evans
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000427039600001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.5194/acp-18-3485-2018
eISSN
1680-7324
Externe Identifier
  • Clarivate Analytics Document Solution ID: FY7JY
ISSN
1680-7316
Ausgabe der Veröffentlichung
5
Zeitschrift
ATMOSPHERIC CHEMISTRY AND PHYSICS
Paginierung
3485 - 3503
Datum der Veröffentlichung
2018
Status
Published
Titel
Temporally delineated sources of major chemical species in high Arctic snow
Sub types
  • Article
Ausgabe der Zeitschrift
18

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Abstract
<jats:p>Abstract. Long-range transport of aerosol from lower latitudes to the high Arctic may be a significant contributor to climate forcing in the Arctic. To identify the sources of key contaminants entering the Canadian High Arctic an intensive campaign of snow sampling was completed at Alert, Nunavut, from September 2014 to June 2015. Fresh snow samples collected every few days were analyzed for black carbon, major ions, and metals, and this rich data set provided an opportunity for a temporally refined source apportionment of snow composition via positive matrix factorization (PMF) in conjunction with FLEXPART (FLEXible PARTicle dispersion model) potential emission sensitivity analysis. Seven source factors were identified: sea salt, crustal metals, black carbon, carboxylic acids, nitrate, non-crustal metals, and sulfate. The sea salt and crustal factors showed good agreement with expected composition and primarily northern sources. High loadings of V and Se onto Factor 2, crustal metals, was consistent with expected elemental ratios, implying these metals were not primarily anthropogenic in origin. Factor 3, black carbon, was an acidic factor dominated by black carbon but with some sulfate contribution over the winter-haze season. The lack of K+ associated with this factor, a Eurasian source, and limited known forest fire events coincident with this factor's peak suggested a predominantly anthropogenic combustion source. Factor 4, carboxylic acids, was dominated by formate and acetate with a moderate correlation to available sunlight and an oceanic and North American source. A robust identification of this factor was not possible; however, atmospheric photochemical reactions, ocean microlayer reaction, and biomass burning were explored as potential contributors. Factor 5, nitrate, was an acidic factor dominated by NO3−, with a likely Eurasian source and mid-winter peak. The isolation of NO3− on a separate factor may reflect its complex atmospheric processing, though the associated source region suggests possibly anthropogenic precursors. Factor 6, non-crustal metals, showed heightened loadings of Sb, Pb, and As, and correlation with other metals traditionally associated with industrial activities. Similar to Factor 3 and 5, this factor appeared to be largely Eurasian in origin. Factor 7, sulfate, was dominated by SO42− and MS with a fall peak and high acidity. Coincident volcanic activity and northern source regions may suggest a processed SO2 source of this factor. </jats:p>
Autoren
  • Katrina M Macdonald
  • Sangeeta Sharma
  • Desiree Toom
  • Alina Chivulescu
  • Andrew Platt
  • Mike Elsasser
  • Lin Huang
  • Richard Leaitch
  • Nathan Chellman
  • Joseph R McConnell
  • Heiko Bozem
  • Daniel Kunkel
  • Ying Duan Lei
  • Cheol-Heon Jeong
  • Jonathan PD Abbatt
  • Greg J Evans
DOI
10.5194/acp-18-3485-2018
eISSN
1680-7324
Ausgabe der Veröffentlichung
5
Zeitschrift
Atmospheric Chemistry and Physics
Sprache
en
Online publication date
2018
Paginierung
3485 - 3503
Status
Published online
Herausgeber
Copernicus GmbH
Herausgeber URL
http://dx.doi.org/10.5194/acp-18-3485-2018
Datum der Datenerfassung
2020
Titel
Temporally delineated sources of major chemical species in high Arctic snow
Ausgabe der Zeitschrift
18

Datenquelle: Crossref

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