On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula
Total number concentrations of particles having a diameter larger than 10 nm (<i>N</i><sub>CN</sub>), cloud condensation nuclei at several supersaturation (<i>S</i>) values (<i>N</i><sub>CCN</sub>) and number size distributions of particles...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2014-08-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/14/8763/2014/acp-14-8763-2014.pdf |
| _version_ | 1819072883044909056 |
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| author | J. H. Kim S. S. Yum S. Shim W. J. Kim M. Park J.-H. Kim M.-H. Kim S.-C. Yoon |
| author_facet | J. H. Kim S. S. Yum S. Shim W. J. Kim M. Park J.-H. Kim M.-H. Kim S.-C. Yoon |
| author_sort | J. H. Kim |
| collection | DOAJ |
| description | Total number concentrations of particles having a diameter larger than 10 nm
(<i>N</i><sub>CN</sub>), cloud condensation nuclei at several supersaturation (<i>S</i>) values
(<i>N</i><sub>CCN</sub>) and number size distributions of particles with 10–414 nm
diameter were measured in Seoul between 2004 and 2010. Overall average
values of <i>N</i><sub>CN</sub> and geometric mean diameter were
17 811 ± 5581 cm<sup>−3</sup> and 48 ± 6 nm. Average <i>N</i><sub>CCN</sub> at 0.4, 0.6 and 0.8% S
were 4145 ± 2016, 5323 ± 2453 and 6067 ± 2780 cm<sup>−3</sup> and
corresponding <i>N</i><sub>CCN</sub> / <i>N</i><sub>CN</sub> were 0.26 ± 0.11, 0.33 ± 0.11 and
0.37 ± 0.12. There is a clear seasonal variation in aerosol
concentration, which seems to be due to the monsoon. <i>N</i><sub>CN</sub> and <i>N</i><sub>CCN</sub>
are also found to depend on the volume of traffic and the height of the
planetary boundary layer, respectively.
<br><br>
During aircraft campaigns in 2009 and 2011, <i>N</i><sub>CN</sub> and <i>N</i><sub>CCN</sub> at
0.6% S (<i>N</i><sub>0.6%</sub>) were measured in and around the Korean Peninsula.
During the 2011 campaign, the aerosol scattering coefficient was also measured.
<i>N</i><sub>CN</sub> and <i>N</i><sub>0.6%</sub> in the lower altitudes were generally higher than
at higher altitudes, except for cases when particle formation and growth
events were thought to occur at higher altitudes. <i>N</i><sub>CN</sub> and <i>N</i><sub>0.6%</sub>
generally show a positive correlation with aerosol scattering coefficients
but this correspondence tends to vary with altitude. Occasional instances of
low (< 0.3) <i>N</i><sub>0.6%</sub> / <i>N</i><sub>CN</sub> in the boundary layer are
demonstrated to be associated with particle formation and growth events.
With the support of ground measurements, it is confirmed that a particle
formation and growth event did indeed occur over the Yellow Sea on a flight
day, and the areal extent of this event is estimated to be greater than 100 km × 450 km.
<br><br>
With the combination of the current and several relevant previous studies, a
composite map of <i>N</i><sub>CN</sub> and <i>N</i><sub>CCN</sub> in and around the Korean Peninsula
is produced. Overall, the exhibited concentrations are typical of values
measured over polluted regions elsewhere on the globe. Moreover, there is a
generally decreasing trend from west to east over the region, implying that
the region is constantly under the dominant influence of continental
outflow. |
| first_indexed | 2024-12-21T17:44:48Z |
| format | Article |
| id | doaj.art-837a25409cc8430495720b8391f723b4 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-21T17:44:48Z |
| publishDate | 2014-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-837a25409cc8430495720b8391f723b42022-12-21T18:55:32ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242014-08-0114168763877910.5194/acp-14-8763-2014On the submicron aerosol distributions and CCN number concentrations in and around the Korean PeninsulaJ. H. Kim0S. S. Yum1S. Shim2W. J. Kim3M. Park4J.-H. Kim5M.-H. Kim6S.-C. Yoon7Department of Atmospheric Sciences, Yonsei University, Seoul, South KoreaDepartment of Atmospheric Sciences, Yonsei University, Seoul, South KoreaDepartment of Atmospheric Sciences, Yonsei University, Seoul, South KoreaDepartment of Atmospheric Sciences, Yonsei University, Seoul, South KoreaDepartment of Atmospheric Sciences, Yonsei University, Seoul, South KoreaSchool of Earth and Environmental Sciences, Seoul National University, Seoul, South KoreaSchool of Earth and Environmental Sciences, Seoul National University, Seoul, South KoreaSchool of Earth and Environmental Sciences, Seoul National University, Seoul, South KoreaTotal number concentrations of particles having a diameter larger than 10 nm (<i>N</i><sub>CN</sub>), cloud condensation nuclei at several supersaturation (<i>S</i>) values (<i>N</i><sub>CCN</sub>) and number size distributions of particles with 10–414 nm diameter were measured in Seoul between 2004 and 2010. Overall average values of <i>N</i><sub>CN</sub> and geometric mean diameter were 17 811 ± 5581 cm<sup>−3</sup> and 48 ± 6 nm. Average <i>N</i><sub>CCN</sub> at 0.4, 0.6 and 0.8% S were 4145 ± 2016, 5323 ± 2453 and 6067 ± 2780 cm<sup>−3</sup> and corresponding <i>N</i><sub>CCN</sub> / <i>N</i><sub>CN</sub> were 0.26 ± 0.11, 0.33 ± 0.11 and 0.37 ± 0.12. There is a clear seasonal variation in aerosol concentration, which seems to be due to the monsoon. <i>N</i><sub>CN</sub> and <i>N</i><sub>CCN</sub> are also found to depend on the volume of traffic and the height of the planetary boundary layer, respectively. <br><br> During aircraft campaigns in 2009 and 2011, <i>N</i><sub>CN</sub> and <i>N</i><sub>CCN</sub> at 0.6% S (<i>N</i><sub>0.6%</sub>) were measured in and around the Korean Peninsula. During the 2011 campaign, the aerosol scattering coefficient was also measured. <i>N</i><sub>CN</sub> and <i>N</i><sub>0.6%</sub> in the lower altitudes were generally higher than at higher altitudes, except for cases when particle formation and growth events were thought to occur at higher altitudes. <i>N</i><sub>CN</sub> and <i>N</i><sub>0.6%</sub> generally show a positive correlation with aerosol scattering coefficients but this correspondence tends to vary with altitude. Occasional instances of low (< 0.3) <i>N</i><sub>0.6%</sub> / <i>N</i><sub>CN</sub> in the boundary layer are demonstrated to be associated with particle formation and growth events. With the support of ground measurements, it is confirmed that a particle formation and growth event did indeed occur over the Yellow Sea on a flight day, and the areal extent of this event is estimated to be greater than 100 km × 450 km. <br><br> With the combination of the current and several relevant previous studies, a composite map of <i>N</i><sub>CN</sub> and <i>N</i><sub>CCN</sub> in and around the Korean Peninsula is produced. Overall, the exhibited concentrations are typical of values measured over polluted regions elsewhere on the globe. Moreover, there is a generally decreasing trend from west to east over the region, implying that the region is constantly under the dominant influence of continental outflow.http://www.atmos-chem-phys.net/14/8763/2014/acp-14-8763-2014.pdf |
| spellingShingle | J. H. Kim S. S. Yum S. Shim W. J. Kim M. Park J.-H. Kim M.-H. Kim S.-C. Yoon On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula Atmospheric Chemistry and Physics |
| title | On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula |
| title_full | On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula |
| title_fullStr | On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula |
| title_full_unstemmed | On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula |
| title_short | On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula |
| title_sort | on the submicron aerosol distributions and ccn number concentrations in and around the korean peninsula |
| url | http://www.atmos-chem-phys.net/14/8763/2014/acp-14-8763-2014.pdf |
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