Wet atmospheric deposition of organic carbon: An underreported source of carbon to watersheds in the northeastern United States

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Abstract

We measured wet atmospheric deposition of dissolved organic carbon (DOC) over 6 years at a network of 12 monitoring sites across Pennsylvania, quantified rates of wet DOC deposition, and developed the first statewide estimates of inputs of DOC to watersheds via wet deposition. Average annual volume-weighted concentration of DOC was 0.71mgC L-1. Annual wet deposition fluxes of DOC varied between sites and years, ranging from 3 to 13 kg C ha-1 yr -1, with an average value of 8 kg Cha -1 yr-1 across all sites and years and are of the same order of magnitude as literature values for riverine organic carbon fluxes in the northeastern United States. The rates of wet DOC deposition showed a pronounced seasonality and spatial distribution, with highest deposition rates observed in the summer, especially at the sites located in western Pennsylvania. Significant links between DOC and inorganic constituents in precipitation, such as sulfate and inorganic nitrogen forms, point to the similarity of sources and atmospheric processing and suggest that DOC may potentially affect their atmospheric transport and ecological fate. Observational data resulting from this study underscore the potential significance of atmospheric deposition as an external input of reactive carbon species to watersheds and may be useful for constraining atmospheric carbon models and evaluating atmospheric influences on ecosystems.

Original languageEnglish (US)
Pages (from-to)3104-3115
Number of pages12
JournalJournal of Geophysical Research
Volume122
Issue number5
DOIs
StatePublished - Jan 1 2017

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Northeastern United States
atmospheric deposition
Organic carbon
dissolved organic carbon
Watersheds
Carbon
organic carbon
watershed
carbon
wet deposition
Fluxes
atmospheric transport
inorganic nitrogen
carbon flux
Deposition rates
seasonality
Ecosystems
sulfates
Spatial distribution
Sulfates

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

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title = "Wet atmospheric deposition of organic carbon: An underreported source of carbon to watersheds in the northeastern United States",
abstract = "We measured wet atmospheric deposition of dissolved organic carbon (DOC) over 6 years at a network of 12 monitoring sites across Pennsylvania, quantified rates of wet DOC deposition, and developed the first statewide estimates of inputs of DOC to watersheds via wet deposition. Average annual volume-weighted concentration of DOC was 0.71mgC L-1. Annual wet deposition fluxes of DOC varied between sites and years, ranging from 3 to 13 kg C ha-1 yr -1, with an average value of 8 kg Cha -1 yr-1 across all sites and years and are of the same order of magnitude as literature values for riverine organic carbon fluxes in the northeastern United States. The rates of wet DOC deposition showed a pronounced seasonality and spatial distribution, with highest deposition rates observed in the summer, especially at the sites located in western Pennsylvania. Significant links between DOC and inorganic constituents in precipitation, such as sulfate and inorganic nitrogen forms, point to the similarity of sources and atmospheric processing and suggest that DOC may potentially affect their atmospheric transport and ecological fate. Observational data resulting from this study underscore the potential significance of atmospheric deposition as an external input of reactive carbon species to watersheds and may be useful for constraining atmospheric carbon models and evaluating atmospheric influences on ecosystems.",
author = "Lidiia Iavorivska and Boyer, {Elizabeth Weeks} and Grimm, {Jeffrey Wayne}",
year = "2017",
month = "1",
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doi = "10.1002/2016JD026027",
language = "English (US)",
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pages = "3104--3115",
journal = "Journal of Geophysical Research",
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TY - JOUR

T1 - Wet atmospheric deposition of organic carbon

T2 - An underreported source of carbon to watersheds in the northeastern United States

AU - Iavorivska, Lidiia

AU - Boyer, Elizabeth Weeks

AU - Grimm, Jeffrey Wayne

PY - 2017/1/1

Y1 - 2017/1/1

N2 - We measured wet atmospheric deposition of dissolved organic carbon (DOC) over 6 years at a network of 12 monitoring sites across Pennsylvania, quantified rates of wet DOC deposition, and developed the first statewide estimates of inputs of DOC to watersheds via wet deposition. Average annual volume-weighted concentration of DOC was 0.71mgC L-1. Annual wet deposition fluxes of DOC varied between sites and years, ranging from 3 to 13 kg C ha-1 yr -1, with an average value of 8 kg Cha -1 yr-1 across all sites and years and are of the same order of magnitude as literature values for riverine organic carbon fluxes in the northeastern United States. The rates of wet DOC deposition showed a pronounced seasonality and spatial distribution, with highest deposition rates observed in the summer, especially at the sites located in western Pennsylvania. Significant links between DOC and inorganic constituents in precipitation, such as sulfate and inorganic nitrogen forms, point to the similarity of sources and atmospheric processing and suggest that DOC may potentially affect their atmospheric transport and ecological fate. Observational data resulting from this study underscore the potential significance of atmospheric deposition as an external input of reactive carbon species to watersheds and may be useful for constraining atmospheric carbon models and evaluating atmospheric influences on ecosystems.

AB - We measured wet atmospheric deposition of dissolved organic carbon (DOC) over 6 years at a network of 12 monitoring sites across Pennsylvania, quantified rates of wet DOC deposition, and developed the first statewide estimates of inputs of DOC to watersheds via wet deposition. Average annual volume-weighted concentration of DOC was 0.71mgC L-1. Annual wet deposition fluxes of DOC varied between sites and years, ranging from 3 to 13 kg C ha-1 yr -1, with an average value of 8 kg Cha -1 yr-1 across all sites and years and are of the same order of magnitude as literature values for riverine organic carbon fluxes in the northeastern United States. The rates of wet DOC deposition showed a pronounced seasonality and spatial distribution, with highest deposition rates observed in the summer, especially at the sites located in western Pennsylvania. Significant links between DOC and inorganic constituents in precipitation, such as sulfate and inorganic nitrogen forms, point to the similarity of sources and atmospheric processing and suggest that DOC may potentially affect their atmospheric transport and ecological fate. Observational data resulting from this study underscore the potential significance of atmospheric deposition as an external input of reactive carbon species to watersheds and may be useful for constraining atmospheric carbon models and evaluating atmospheric influences on ecosystems.

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