An Analysis of Aerosol-Cloud Relationship Using MODIS and NCEP/NCAR Reanalysis Data around Korea

Kim, Yoo-Jun; Lee, Jinhwa; Kim, Byung-Gon

doi:10.5572/kosae.2011.27.2.152

Cited by 3 publications

(4 citation statements)

References 22 publications

(6 reference statements)

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“…As this is the first vertical measurements made over the inland of Korean Peninsula, this study focuses on analyzing the vertical structure of aerosols measured over the Yellow Sea, Seoul, Gangneung and East Sea by the aircraft transects from east to west in the Korean Peninsula. Previous studies [19,21] have shown the east-west aerosol gradients across the Korean Peninsula; thus, this study further verifies the east-west gradients of the total aerosol number concentrations (N cn ).…”

Section: Introductionsupporting

confidence: 79%

“…According to Figure 6, the aerosol concentrations in the PBL recorded from the ocean-leg (blue, open symbols) were lower than those from the land-leg (blue, filled symbols), even though the origins of the airmass were similar. The lower aerosol concentrations over the East Sea in previous studies [19,21] could not be relates to the continental outflows but occurred because the airmass stayed over the ocean a couple of hours before being sampled.…”

Section: Discussionmentioning

confidence: 78%

“…The lower Countries in continental outflow regions are dominantly affected by aerosols of upwind areas. A previous study has shown the east-west contrast of AOD over the Korean Peninsula with the highest AOD over China, then the Yellow Sea, followed by AOD in the middle of the Korean Peninsula, then the eastern part of Korea [21]. Reference [19] also showed that aerosol concentrations in the PBL were higher over the Yellow Sea than over the East Sea based on airborne measurements.…”

Section: Discussionmentioning

confidence: 93%

“…Korea is in the continental outflow regions and is affected by various kinds of aerosols. Aerosol studies in and around the Korean Peninsula have been conducted using groundand ship-based measurements [10,[17][18][19][20], satellite-based aerosol optical depth (AOD) [21], lidar retrieval of aerosol mass concentrations [22] and aircraft measurements [19,23,24]. In contrast to the remote sensor, an aircraft can directly probe aerosol properties using in situ instruments.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Aerosol Properties within and above the Planetary Boundary Layer across the Korean Peninsula during December 2016

Jung

Seo²,

Chang

et al. 2021

Atmosphere

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During December 2016, airborne aerosol measurements were taken at multiple heights across the Korean Peninsula to examine the vertical properties of aerosols. This study showed that aerosols above the planetary boundary layer (PBL) show similar concentrations and particle size distributions (PSDs), regardless of the relative locations in Korea. On the other hand, aerosols within the PBL differ depending on the geographical location, origin and path of the air mass. The concentrations are the highest in Seoul, followed by Gangneung, East Sea and the Yellow Sea. The known east–west aerosol gradient did not appear and the reasons are discussed in this paper. The study further shows that the aerosols of upwind regions affect the aerosols above the PBL, whereas aerosols in the PBL are affected by local sources and atmospheric conditions in addition to aerosols of upwind areas.

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Section: Introductionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Aerosol Properties within and above the Planetary Boundary Layer across the Korean Peninsula during December 2016

Jung

Seo²,

Chang

et al. 2021

Atmosphere

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On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula

et al. 2014

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Abstract. Total number concentrations of particles having a diameter larger than 10 nm (N CN ), cloud condensation nuclei at several supersaturation (S) values (N CCN ) and number size distributions of particles with 10-414 nm diameter were measured in Seoul between 2004 and 2010. Overall average values of N CN and geometric mean diameter were 17 811 ± 5581 cm −3 and 48 ± 6 nm. Average N CCN at 0.4, 0.6 and 0.8 % S were 4145 ± 2016, 5323 ± 2453 and 6067 ± 2780 cm −3 and corresponding N CCN / N CN 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. N CN and N CCN are also found to depend on the volume of traffic and the height of the planetary boundary layer, respectively.During aircraft campaigns in 2009 and 2011, N CN and N CCN at 0.6 % S (N 0.6 % ) were measured in and around the Korean Peninsula. During the 2011 campaign, the aerosol scattering coefficient was also measured. N CN and N 0.6 % 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. N CN and N 0.6 % generally show a positive correlation with aerosol scattering coefficients but this correspondence tends to vary with altitude. Occasional instances of low (< 0.3) N 0.6 % / N CN 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.With the combination of the current and several relevant previous studies, a composite map of N CN and N CCN 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.

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On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula

Kim¹,

Yum²,

Shim³

et al. 2014

Preprint

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Abstract. Total number concentrations of particles having diameter larger than 10 nm (NCN), cloud condensation nuclei at several supersaturation (S) values (NCCN), and the number size distribution of particles for 10–414 nm particle diameter range were measured in Seoul between 2004 and 2010. Overall average values of NCN and geometric mean diameter are 17 811 ± 5581 cm−3 and 48 ± 6 nm, respectively. Average NCCN at 0.4, 0.6, and 0.8% S are 4145 ± 2016, 5323 ± 2453 and 6067 ± 2780 cm−3, respectively and corresponding NCCN / NCN are 0.26 ± 0.11, 0.33 ± 0.11 and 0.37 ± 0.12. There is a clear seasonal variation of aerosol concentration, which seems to be due to the monsoon. NCN and NCCN are also found to be dependent on the volume of traffic and the height of planetary boundary layer, respectively. During the two aircraft campaigns in 2009 and 2011, NCN and NCCN at 0.6% S were measured in and around the Korean Peninsula. During the 2011 campaign, aerosol scattering coefficient was also measured. NCN and NCCN 0.6 in the lower altitudes were generally higher than at higher altitudes, except for the cases when particle formation and growth events are thought to occur at higher altitudes. NCN and NCCN 0.6 show generally a positive correlation with aerosol scattering coefficients but its correspondence tends to vary with altitude. Occasional instances of low (< 0.3) NCCN 0.6 / NCN 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 indeed occurred on a flight day over the Yellow Sea and the areal extent of the event is estimated to be greater than 100 km × 450 km. With the combination of the current and several relevant previous studies, a composite map of NCN and NCCN in and around the Korean Peninsula is produced. Overall, the exhibited concentrations are typical of the values measured over the polluted regions elsewhere in 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.

show abstract

An Analysis of Aerosol-Cloud Relationship Using MODIS and NCEP/NCAR Reanalysis Data around Korea

Cited by 3 publications

References 22 publications

Aerosol Properties within and above the Planetary Boundary Layer across the Korean Peninsula during December 2016

Aerosol Properties within and above the Planetary Boundary Layer across the Korean Peninsula during December 2016

On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula

On the submicron aerosol distributions and CCN number concentrations in and around the Korean Peninsula

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