A Global Assessment of Dissolved Organic Carbon in Precipitation

Safieddine, Sarah A.; Heald, Colette L.

doi:10.1002/2017GL075270

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A Global Assessment of Dissolved Organic Carbon in Precipitation

2017
By Safieddine, Sarah A. ; Heald, Colette L.
Source: Geophysical Research Letters 44(22): 11672-11681

[PDF-956.75 KB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Safieddine, Sarah A. ; Heald, Colette L.

Safieddine, Sarah A. ; Heald, Colette L. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

Precipitation is the largest physical removal pathway of atmospheric reactive organic carbon in the form of dissolved organic carbon (DOC). We present the first global DOC distribution simulated with a global model. A total of 85 and 188 Tg C yr−1 are deposited to the ocean and the land, respectively, with DOC ranging between 0.1 and 10 mg C L−1 in this GEOS-Chem simulation. We compare the 2010 simulated DOC to a 30 year synthesis of measurements. Despite limited measurements and imperfect temporal matching, the model is able to reproduce much of the spatial variability of DOC (r = 0.63), with a low bias of 35%. We present the global average carbon oxidation state ( urn:x-wiley:00948276:media:grl56651:grl56651-math-0001) as a simple metric for describing the chemical composition. In the atmosphere, urn:x-wiley:00948276:media:grl56651:grl56651-math-0002, and the increase in solubility upon oxidation leads to a global increase in urn:x-wiley:00948276:media:grl56651:grl56651-math-0003 in precipitation with urn:x-wiley:00948276:media:grl56651:grl56651-math-0004.
Keywords:

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Atmospheric Chemistry Carbon Precipitation (Meteorology)
Source:

Geophysical Research Letters 44(22): 11672-11681
DOI:

https://doi.org/10.1002/2017GL075270
Document Type:

Journal Article
Funding:

Grant no. NA14OAR4310132
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Submitted
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urn:sha256:a4151555b3efde4139e588defb6fb5db885b126de5f493aee9f08440d5909bc4
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https://repository.library.noaa.gov/view/noaa/45491/noaa_45491_DS1.pdf
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A Global Assessment of Dissolved Organic Carbon in Precipitation

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