| Title |
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Stable carbon isotopic composition of low-molecular-weight dicarboxylic acids and ketoacids in remote marine aerosols
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| Creator |
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| Accessrights |
open access |
| Subject |
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Other
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Carbon isotopic composition
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Other
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Decarboxylation
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Other
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Latitudinal change
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Other
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Photochemical aging
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NDC
450
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| Description |
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Abstract
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[ 1] We determined stable carbon isotopic composition (delta C-13) of C-2 to C-9 dicarboxylic acids (DCAs) and some ketoacids in the marine aerosols from the western Pacific and Southern Ocean (35 degrees N to 65 degrees S). On average, oxalic ( mean, - 16.8 parts per thousand), adipic ( - 17.2 parts per thousand), and glyoxylic ( - 17.6 parts per thousand) acids showed heavier delta C-13, whereas maleic ( - 24.2 parts per thousand), methylmalonic ( - 23.6 parts per thousand), and phthalic ( - 23.1 parts per thousand) acids were more depleted in C-13. Oxalic acid presented very diverse delta C-13 values ( - 27 to -7 parts per thousand), which increased from midlatitudes toward the equator. A similar latitudinal trend of delta C-13 was also found for malonic, succinic, and adipic acids. However, such a trend was not observed for phthalic, maleic, and glyoxylic acids. We suggest that the delta C-13 increase toward the equator is associated with photochemically aged air masses, in which kinetic isotope effects for photochemical degradation of DCAs may be important. Differences in delta C-13 of some saturated DCAs were also found to increase from midlatitudes to the equator.
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| Publisher |
en
AMER GEOPHYSICAL UNION
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| Date |
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| Language |
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| Resource Type |
journal article |
| Version Type |
AM |
| Identifier |
HDL
http://hdl.handle.net/2115/13709
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| Relation |
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URI
http://www.agu.org/
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isVersionOf
DOI
https://doi.org/10.1029/2005JD006466.
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| Journal |
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JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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Volume Number111
Issue NumberD7
Page StartD07304
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| File |
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| Oaidate |
2023-07-26 |
