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Spatial and Temporal Patterns in Atmospheric Deposition of Dissolved Organic Carbon

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. 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.

Details

Volume 36
Tijdschrift nummer 10
Type A1: Web of Science-artikel
Categorie Onderzoek
Tijdschrift GLOBAL BIOGEOCHEMICAL CYCLES
Issns 0886-6236
Uitgeverij Wiley-Blackwell
Taal Engels
Bibtex

@misc{9223210e-250f-4f84-8713-977e6b79fafc,
title = "Spatial and Temporal Patterns in Atmospheric Deposition of Dissolved Organic Carbon",
abstract = "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. 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.",
author = "Daniel Liptzin and Jens Boy and John L. Campbell and Nicholas Clarke and Jean-Paul Laclau and Roberto Godoy and Sherri L. Johnson and Klaus Kaiser and Gene E. Likens and Gunilla Pihl Karlsson and Daniel Markewitz and Michela Rogora and Stephen D. Sebestyen and James B. Shanley and Elena Vanguelova and Arne Verstraeten and Wolfgang Wilcke and Fred Worrall and William H. McDowell",
year = "2022",
month = okt,
day = "11",
doi = "https://doi.org/10.1029/2022GB007393",
language = "Nederlands",
publisher = "Wiley-Blackwell",
address = "België,
type = "Other"
}

Auteurs

Daniel Liptzin
Jens Boy
John L. Campbell
Nicholas Clarke
Jean-Paul Laclau
Roberto Godoy
Sherri L. Johnson
Klaus Kaiser
Gene E. Likens
Gunilla Pihl Karlsson
Daniel Markewitz
Michela Rogora
Stephen D. Sebestyen
James B. Shanley
Elena Vanguelova
Arne Verstraeten
Wolfgang Wilcke
Fred Worrall
William H. McDowell