MartyHouleDuchesneEtAl2012

Référence

Marty, C., Houle, D., Duchesne, L., Gagnon, C. (2012) Canopy interaction with precipitation and sulphur deposition in two boreal forests of Quebec, Canada. Environmental Pollution, 162:354-360. (Scopus )

Résumé

The interaction of atmospheric sulphur (S) was investigated within the canopies of two boreal forests in Québec, Canada. The net canopy exchange approach, i.e. the difference between S-SO 4 in throughfall and precipitation, suggests high proportion of dry deposition in winter (up to 53%) as compared to summer (1-9%). However, a 3.5‰ decrease in δ 18O-SO 4 throughfall in summer compared to incident precipitation points towards a much larger proportion of dry deposition during the warm season. We suggest that a significant fraction of dry deposition (about 1.2 kg ha -1 yr -1, representing 30-40% of annual wet S deposition) which contributed to the decreased δ 18O-SO 4 in throughfall was taken up by the canopy. Overall, these results showed that, contrary to what is commonly considered, S interchanges in the canopy could be important in boreal forests with low absolute atmospheric S depositions. © 2011 Elsevier Ltd. All rights reserved.

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@ARTICLE { MartyHouleDuchesneEtAl2012,
    AUTHOR = { Marty, C. and Houle, D. and Duchesne, L. and Gagnon, C. },
    TITLE = { Canopy interaction with precipitation and sulphur deposition in two boreal forests of Quebec, Canada },
    JOURNAL = { Environmental Pollution },
    YEAR = { 2012 },
    VOLUME = { 162 },
    PAGES = { 354-360 },
    NOTE = { cited By 3 },
    ABSTRACT = { The interaction of atmospheric sulphur (S) was investigated within the canopies of two boreal forests in Québec, Canada. The net canopy exchange approach, i.e. the difference between S-SO 4 in throughfall and precipitation, suggests high proportion of dry deposition in winter (up to 53%) as compared to summer (1-9%). However, a 3.5‰ decrease in δ 18O-SO 4 throughfall in summer compared to incident precipitation points towards a much larger proportion of dry deposition during the warm season. We suggest that a significant fraction of dry deposition (about 1.2 kg ha -1 yr -1, representing 30-40% of annual wet S deposition) which contributed to the decreased δ 18O-SO 4 in throughfall was taken up by the canopy. Overall, these results showed that, contrary to what is commonly considered, S interchanges in the canopy could be important in boreal forests with low absolute atmospheric S depositions. © 2011 Elsevier Ltd. All rights reserved. },
    AUTHOR_KEYWORDS = { δ 18O-SO 4; δ 34S-SO 4; Boreal forest; Canopy; Canopy exchange; Dissolved organic sulphur; Sulphate; Sulphur deposition; Throughfall },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.envpol.2011.12.007 },
    KEYWORDS = { Boreal forests; Canopy; Organic sulphur; Sulphates; Sulphur deposition; Throughfall, Forestry; Sulfur, Deposition, sulfur, atmospheric deposition; boreal forest; canopy; deposition; precipitation (chemistry); sulfur; throughfall, analytic method; article; atmospheric deposition; Canada; canopy; chemical interaction; dry deposition; precipitation; seasonal variation; summer; taiga; watershed; winter, Air Pollutants; Canada; Environmental Monitoring; Plant Leaves; Quebec; Seasons; Sulfur; Trees, Deposition; Forest Canopy; Forestry; Sulfur, Canada; Quebec [Canada] },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-83755228954&partnerID=40&md5=5042c96c589085ff82f85045754b12d1 },
}

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