High summertime aerosol organic functional group concentrations from marine and seabird sources at Ross Island, Antarctica, during AWARE
Observations of the organic components of the natural aerosol are scarce in Antarctica, which limits our understanding of natural aerosols and their connection to seasonal and spatial patterns of cloud albedo in the region. From November 2015 to December 2016, the ARM West Antarctic Radiation Ex...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-06-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/18/8571/2018/acp-18-8571-2018.pdf |
| _version_ | 1798045431204151296 |
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| author | J. Liu J. Dedrick J. Dedrick L. M. Russell G. I. Senum J. Uin C. Kuang S. R. Springston W. R. Leaitch A. C. Aiken D. Lubin |
| author_facet | J. Liu J. Dedrick J. Dedrick L. M. Russell G. I. Senum J. Uin C. Kuang S. R. Springston W. R. Leaitch A. C. Aiken D. Lubin |
| author_sort | J. Liu |
| collection | DOAJ |
| description | Observations of the organic components of the natural aerosol are scarce in
Antarctica, which limits our understanding of natural aerosols and their
connection to seasonal and spatial patterns of cloud albedo in the region.
From November 2015 to December 2016, the ARM West Antarctic Radiation
Experiment (AWARE) measured submicron aerosol properties near McMurdo Station
at the southern tip of Ross Island. Submicron organic mass (OM), particle
number, and cloud condensation nuclei concentrations were higher in summer
than other seasons. The measurements included a range of compositions and
concentrations that likely reflected both local anthropogenic emissions and
natural background sources. We isolated the natural organic components by
separating a natural factor and a local combustion factor. The natural OM was
150 times higher in summer than in winter. The local anthropogenic emissions
were not hygroscopic and had little contribution to the CCN concentrations.
Natural sources that included marine sea spray and seabird emissions
contributed 56 % OM in summer but only 3 % in winter. The natural OM
had high hydroxyl group fraction (55 %), 6 % alkane, and 6 %
amine group mass, consistent with marine organic composition. In addition,
the Fourier transform infrared (FTIR) spectra showed the natural sources of
organic aerosol were characterized by amide group absorption, which may be
from seabird populations. Carboxylic acid group contributions were high in
summer and associated with natural sources, likely forming by secondary
reactions. |
| first_indexed | 2024-04-11T23:22:02Z |
| format | Article |
| id | doaj.art-50b8c9df24c64dea8d00fae37dd21e94 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-11T23:22:02Z |
| publishDate | 2018-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-50b8c9df24c64dea8d00fae37dd21e942022-12-22T03:57:26ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242018-06-01188571858710.5194/acp-18-8571-2018High summertime aerosol organic functional group concentrations from marine and seabird sources at Ross Island, Antarctica, during AWAREJ. Liu0J. Dedrick1J. Dedrick2L. M. Russell3G. I. Senum4J. Uin5C. Kuang6S. R. Springston7W. R. Leaitch8A. C. Aiken9D. Lubin10Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USAScripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USAnow at: Texas A&M University, 400 Bizzell St, College Station, TX 77843, USAScripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USAEnvironmental & Climate Sciences Department, Brookhaven National Laboratory, Building 815-E, Upton, NY 11973-5000, USAEnvironmental & Climate Sciences Department, Brookhaven National Laboratory, Building 815-E, Upton, NY 11973-5000, USAEnvironmental & Climate Sciences Department, Brookhaven National Laboratory, Building 815-E, Upton, NY 11973-5000, USAEnvironmental & Climate Sciences Department, Brookhaven National Laboratory, Building 815-E, Upton, NY 11973-5000, USAEnvironment and Climate Change Canada (ECCC), Toronto, ON, CanadaEarth and Environmental Science, Earth Systems Observations, Los Alamos National Laboratory, Los Alamos, New Mexico, USAScripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USAObservations of the organic components of the natural aerosol are scarce in Antarctica, which limits our understanding of natural aerosols and their connection to seasonal and spatial patterns of cloud albedo in the region. From November 2015 to December 2016, the ARM West Antarctic Radiation Experiment (AWARE) measured submicron aerosol properties near McMurdo Station at the southern tip of Ross Island. Submicron organic mass (OM), particle number, and cloud condensation nuclei concentrations were higher in summer than other seasons. The measurements included a range of compositions and concentrations that likely reflected both local anthropogenic emissions and natural background sources. We isolated the natural organic components by separating a natural factor and a local combustion factor. The natural OM was 150 times higher in summer than in winter. The local anthropogenic emissions were not hygroscopic and had little contribution to the CCN concentrations. Natural sources that included marine sea spray and seabird emissions contributed 56 % OM in summer but only 3 % in winter. The natural OM had high hydroxyl group fraction (55 %), 6 % alkane, and 6 % amine group mass, consistent with marine organic composition. In addition, the Fourier transform infrared (FTIR) spectra showed the natural sources of organic aerosol were characterized by amide group absorption, which may be from seabird populations. Carboxylic acid group contributions were high in summer and associated with natural sources, likely forming by secondary reactions.https://www.atmos-chem-phys.net/18/8571/2018/acp-18-8571-2018.pdf |
| spellingShingle | J. Liu J. Dedrick J. Dedrick L. M. Russell G. I. Senum J. Uin C. Kuang S. R. Springston W. R. Leaitch A. C. Aiken D. Lubin High summertime aerosol organic functional group concentrations from marine and seabird sources at Ross Island, Antarctica, during AWARE Atmospheric Chemistry and Physics |
| title | High summertime aerosol organic functional group concentrations from marine and seabird sources at Ross Island, Antarctica, during AWARE |
| title_full | High summertime aerosol organic functional group concentrations from marine and seabird sources at Ross Island, Antarctica, during AWARE |
| title_fullStr | High summertime aerosol organic functional group concentrations from marine and seabird sources at Ross Island, Antarctica, during AWARE |
| title_full_unstemmed | High summertime aerosol organic functional group concentrations from marine and seabird sources at Ross Island, Antarctica, during AWARE |
| title_short | High summertime aerosol organic functional group concentrations from marine and seabird sources at Ross Island, Antarctica, during AWARE |
| title_sort | high summertime aerosol organic functional group concentrations from marine and seabird sources at ross island antarctica during aware |
| url | https://www.atmos-chem-phys.net/18/8571/2018/acp-18-8571-2018.pdf |
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