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Spatial and Temporal Patterns in Atmospheric Deposition of Dissolved Organic Carbon

Liptzin, Daniel (författare)
Department of Natural Resources and the Environment University of New Hampshire Durham NH USA;Now at Soil Health Institute Morrisville NC USA
Boy, Jens (författare)
Institute of Soil Science Leibniz Universität Hannover Germany
Campbell, John L. (författare)
USDA Forest Service Northern Research Station Durham NH USA
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Clarke, Nicholas (författare)
Norwegian Institute of Bioeconomy Research (NIBIO) Ås Norway
Laclau, Jean‐Paul (författare)
Eco&Sols University Montpellier CIRAD INRA IRD Montpellier SupAgro Montpellier France
Godoy, Roberto (författare)
Instituto Ciencias Ambientales y Evolutivas Facultad de Ciencias Universidad Austral de Chile Valdivia Chile
Johnson, Sherri L. (författare)
USDA Forest Service Pacific Northwest Research Station Corvallis OR USA
Kaiser, Klaus (författare)
Soil Science Martin Luther University Halle‐Wittenberg Halle Germany
Likens, Gene E. (författare)
Cary Institute of Ecosystem Studies Millbrook NY USA
Karlsson, Gunilla Pihl (författare)
IVL Svenska Miljöinstitutet,IVL Swedish Environmental Research Institute Gothenburg Sweden
Markewitz, Daniel (författare)
Warnell School of Forestry and Natural Resources The University of Georgia Athens GA USA
Rogora, Michela (författare)
National Research Council of Italy Water Research Institute (CNR‐IRSA) Rome Italy
Sebestyen, Stephen D. (författare)
Northern Research Station US Department of Agriculture Forest Service Grand Rapids MN USA
Shanley, James B. (författare)
US Geological Survey Montpelier VT USA
Vanguelova, Elena (författare)
Forest Research Alice Holt Lodge Farnham UK
Verstraeten, Arne (författare)
Research Institute for Nature and Forest (INBO) Geraardsbergen Belgium
Wilcke, Wolfgang (författare)
Institute of Geography and Geoecology Karlsruhe Institute of Technology (KIT) Karlsruhe Germany
Worrall, Fred (författare)
Department of Earth Sciences Durham University Durham UK
McDowell, William H. (författare)
Department of Natural Resources and the Environment University of New Hampshire Durham NH USA
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 (creator_code:org_t)
2022-10-17
2022
Engelska.
Ingår i: Global Biogeochemical Cycles. - : American Geophysical Union (AGU). - 0886-6236 .- 1944-9224. ; 36:10
Relaterad länk:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Atmospheric deposition of dissolved organic carbon (DOC) to terrestrial ecosystems is a small, but rarely studied component of the global carbon (C) cycle.Emissions of volatile organic compounds (VOC) and organic particulates are the sources of atmospheric C and deposition represents a major pathway for the removal of organic C from the atmosphere.Here, we evaluate the spatial and temporal patterns of DOC deposition using 70 data sets at least one year in length ranging from 40° south to 66° north latitude. Globally, the median DOC concentration in bulk deposition was 1.7 mg L −1. The DOC concentrations were significantly higher in tropical (<25°) latitudes compared to temperate (>25°) latitudes.DOC deposition was significantly higher in the tropics because of both higher DOC concentrations and precipitation. Using the global median or latitudinal specific DOC concentrations leads to a calculated global deposition of 202 or 295 Tg C yr −1 respectively.Many sites exhibited seasonal variability in DOC concentration. At temperate sites, DOC concentrations were higher during the growing season; at tropical sites, DOC concentrations were higher during the dry season. Thirteen of the thirty-four long-term (>10 years) data sets showed significant declines in DOC concentration over time with the others showing no significant change.Based on the magnitude and timing of the various sources of organic C to the atmosphere, biogenic VOCs likely explain the latitudinal pattern and the seasonal pattern at temperate latitudes while decreases in anthropogenic emissions are the most likely explanation for the declines in DOC  concentration.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)

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