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Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin
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| Title: | Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin |
| Authors: | Miyazaki, Y. Browse this author →KAKEN DB | | Sawano, M. Browse this author | | Kawamura, K. Browse this author →KAKEN DB |
| Issue Date: | 20-Aug-2014 |
| Publisher: | Copernicus Publications |
| Journal Title: | Biogeosciences |
| Volume: | 11 |
| Issue: | 16 |
| Start Page: | 4407 |
| End Page: | 4414 |
| Publisher DOI: | 10.5194/bg-11-4407-2014 |
| Abstract: | Lactic acid (LA) and glycolic acid (GA), which are low-molecular-weight hydroxyacids, were identified in the particle and gas phases within the marine atmospheric boundary layer over the western subarctic North Pacific. A major portion of LA (81%) and GA (57%) was present in the particulate phase, which is consistent with the presence of a hydroxyl group in these molecules leading to the low volatility of the compounds. The average concentration (±SD) of LA in more biologically influenced marine aerosols (33 ± 58 ng m−3) was substantially higher than that in less biologically influenced aerosols (11 ± 12 ng m−3). Over the oceanic region of phytoplankton blooms, the concentration of aerosol LA was comparable to that of oxalic acid, which was the most abundant diacid during the study period. A positive correlation was found between the LA concentrations in more biologically influenced aerosols and chlorophyll a in seawater (r2 = 0.56), suggesting an important production of aerosol LA possibly associated with microbial (e.g., lactobacillus) activity in seawater and/or aerosols. Our finding provides a new insight into the poorly quantified microbial sources of marine organic aerosols (OAs) because such low-molecular-weight hydroxyacids are key intermediates for OA formation. |
| Rights: | http://creativecommons.org/licenses/by/3.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/56848 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 宮崎 雄三
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