Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North Pacific
<p>Water-soluble organic nitrogen (WSON) in marine atmospheric aerosols affect the water solubility, acidity, and light-absorbing properties of aerosol particles, which are important parameters in assessing both the climate impact and the biogeochemical cycling of bioelements. Size-segregated...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2023-01-01
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| Series: | Biogeosciences |
| Online Access: | https://bg.copernicus.org/articles/20/439/2023/bg-20-439-2023.pdf |
| _version_ | 1811176868708089856 |
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| author | T. Dobashi T. Dobashi Y. Miyazaki E. Tachibana K. Takahashi S. Horii S. Horii F. Hashihama S. Yasui-Tamura Y. Iwamoto S.-K. Wong S.-K. Wong K. Hamasaki |
| author_facet | T. Dobashi T. Dobashi Y. Miyazaki E. Tachibana K. Takahashi S. Horii S. Horii F. Hashihama S. Yasui-Tamura Y. Iwamoto S.-K. Wong S.-K. Wong K. Hamasaki |
| author_sort | T. Dobashi |
| collection | DOAJ |
| description | <p>Water-soluble organic nitrogen (WSON) in marine
atmospheric aerosols affect the water solubility, acidity, and
light-absorbing properties of aerosol particles, which are important
parameters in assessing both the climate impact and the biogeochemical
cycling of bioelements. Size-segregated aerosol and surface seawater (SSW)
samples were simultaneously collected over the subtropical North Pacific to
investigate the origin of WSON in the marine atmosphere. The fine-mode WSON
concentration (7.5 <span class="inline-formula">±</span> 6.6 ngN m<span class="inline-formula"><sup>−3</sup></span>) at 200–240<span class="inline-formula"><sup>∘</sup></span> E
along 23<span class="inline-formula"><sup>∘</sup></span> N, defined as the eastern North Pacific (ENP), was
significantly higher than that (2.4 <span class="inline-formula">±</span> 1.9 ngN m<span class="inline-formula"><sup>−3</sup></span>) at
135–200<span class="inline-formula"><sup>∘</sup></span> E, defined as the western North Pacific (WNP).
Analysis of the stable carbon isotope ratio of water-soluble organic carbon
(WSOC; <span class="inline-formula"><i>δ</i><sup>13</sup></span>C<span class="inline-formula"><sub>WSOC</sub></span>) together with backward trajectory
indicated that most of the observed WSON in the fine particles in the ENP
originated from the ocean surface. We found positive relations among
nitrogen-fixation rate, dissolved organic nitrogen (DON) in SSW, and the
WSON concentrations. The result suggests that reactive nitrogen (DON and
ammonium), produced and exuded by nitrogen-fixing microorganisms in SSW,
contributed to the formation of WSON aerosols. This study provides new
insights into the role of ocean-derived reactive nitrogen aerosols
associated with marine microbial activity.</p> |
| first_indexed | 2024-04-10T19:58:50Z |
| format | Article |
| id | doaj.art-039bc9c42b7f4ff99b2f73a2d086bd0f |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-04-10T19:58:50Z |
| publishDate | 2023-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-039bc9c42b7f4ff99b2f73a2d086bd0f2023-01-27T10:22:05ZengCopernicus PublicationsBiogeosciences1726-41701726-41892023-01-012043944910.5194/bg-20-439-2023Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North PacificT. Dobashi0T. Dobashi1Y. Miyazaki2E. Tachibana3K. Takahashi4S. Horii5S. Horii6F. Hashihama7S. Yasui-Tamura8Y. Iwamoto9S.-K. Wong10S.-K. Wong11K. Hamasaki12Graduate School of Environmental Science, Hokkaido University, Sapporo, 060-0810, JapanInstitute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, JapanInstitute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, JapanInstitute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, JapanGraduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, JapanGraduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657, Japannow at: Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Nagasaki, 851-2213, JapanDepartment of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, 108-8477, JapanDepartment of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, 108-8477, JapanGraduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, 739-8521, JapanAtmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, 277-8564, Japannow at: National Institute of Polar Research, Tokyo, 190-8518, JapanAtmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, 277-8564, Japan<p>Water-soluble organic nitrogen (WSON) in marine atmospheric aerosols affect the water solubility, acidity, and light-absorbing properties of aerosol particles, which are important parameters in assessing both the climate impact and the biogeochemical cycling of bioelements. Size-segregated aerosol and surface seawater (SSW) samples were simultaneously collected over the subtropical North Pacific to investigate the origin of WSON in the marine atmosphere. The fine-mode WSON concentration (7.5 <span class="inline-formula">±</span> 6.6 ngN m<span class="inline-formula"><sup>−3</sup></span>) at 200–240<span class="inline-formula"><sup>∘</sup></span> E along 23<span class="inline-formula"><sup>∘</sup></span> N, defined as the eastern North Pacific (ENP), was significantly higher than that (2.4 <span class="inline-formula">±</span> 1.9 ngN m<span class="inline-formula"><sup>−3</sup></span>) at 135–200<span class="inline-formula"><sup>∘</sup></span> E, defined as the western North Pacific (WNP). Analysis of the stable carbon isotope ratio of water-soluble organic carbon (WSOC; <span class="inline-formula"><i>δ</i><sup>13</sup></span>C<span class="inline-formula"><sub>WSOC</sub></span>) together with backward trajectory indicated that most of the observed WSON in the fine particles in the ENP originated from the ocean surface. We found positive relations among nitrogen-fixation rate, dissolved organic nitrogen (DON) in SSW, and the WSON concentrations. The result suggests that reactive nitrogen (DON and ammonium), produced and exuded by nitrogen-fixing microorganisms in SSW, contributed to the formation of WSON aerosols. This study provides new insights into the role of ocean-derived reactive nitrogen aerosols associated with marine microbial activity.</p>https://bg.copernicus.org/articles/20/439/2023/bg-20-439-2023.pdf |
| spellingShingle | T. Dobashi T. Dobashi Y. Miyazaki E. Tachibana K. Takahashi S. Horii S. Horii F. Hashihama S. Yasui-Tamura Y. Iwamoto S.-K. Wong S.-K. Wong K. Hamasaki Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North Pacific Biogeosciences |
| title | Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North Pacific |
| title_full | Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North Pacific |
| title_fullStr | Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North Pacific |
| title_full_unstemmed | Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North Pacific |
| title_short | Marine nitrogen fixation as a possible source of atmospheric water-soluble organic nitrogen aerosols in the subtropical North Pacific |
| title_sort | marine nitrogen fixation as a possible source of atmospheric water soluble organic nitrogen aerosols in the subtropical north pacific |
| url | https://bg.copernicus.org/articles/20/439/2023/bg-20-439-2023.pdf |
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