The free troposphere as a potential source of arctic boundary layer aerosol particles
Abstract This study investigates aerosol particle transport from the free troposphere to the boundary layer in the summertime high Arctic. Observations from the Arctic Summer Cloud Ocean Study field campaign show several occurrences of high aerosol particle concentrations above the boundary layer to...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2017GL073808 |
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| author | Adele L. Igel Annica M. L. Ekman Caroline Leck Michael Tjernström Julien Savre Joseph Sedlar |
| author_facet | Adele L. Igel Annica M. L. Ekman Caroline Leck Michael Tjernström Julien Savre Joseph Sedlar |
| author_sort | Adele L. Igel |
| collection | DOAJ |
| description | Abstract This study investigates aerosol particle transport from the free troposphere to the boundary layer in the summertime high Arctic. Observations from the Arctic Summer Cloud Ocean Study field campaign show several occurrences of high aerosol particle concentrations above the boundary layer top. Large‐eddy simulations suggest that when these enhanced aerosol concentrations are present, they can be an important source of aerosol particles for the boundary layer. Most particles are transported to the boundary layer by entrainment. However, it is found that mixed‐phase stratocumulus clouds, which often extend into the inversion layer, also can mediate the transport of particles into the boundary layer by activation at cloud top and evaporation below cloud base. Finally, the simulations also suggest that aerosol properties at the surface sometimes may not be good indicators of aerosol properties in the cloud layer. |
| format | Article |
| id | doaj-art-40fdee300b4e4f13802478a4f0458cd0 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2017-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-40fdee300b4e4f13802478a4f0458cd02025-08-20T03:49:46ZengWileyGeophysical Research Letters0094-82761944-80072017-07-0144137053706010.1002/2017GL073808The free troposphere as a potential source of arctic boundary layer aerosol particlesAdele L. Igel0Annica M. L. Ekman1Caroline Leck2Michael Tjernström3Julien Savre4Joseph Sedlar5Department of Atmospheric Science Colorado State University Fort Collins Colorado USADepartment of Meteorology and Bolin Centre for Climate Research Stockholm University Stockholm SwedenDepartment of Meteorology and Bolin Centre for Climate Research Stockholm University Stockholm SwedenDepartment of Meteorology and Bolin Centre for Climate Research Stockholm University Stockholm SwedenDepartment of Geography and Centre for Atmospheric Sciences University of Cambridge Cambridge UKDepartment of Meteorology and Bolin Centre for Climate Research Stockholm University Stockholm SwedenAbstract This study investigates aerosol particle transport from the free troposphere to the boundary layer in the summertime high Arctic. Observations from the Arctic Summer Cloud Ocean Study field campaign show several occurrences of high aerosol particle concentrations above the boundary layer top. Large‐eddy simulations suggest that when these enhanced aerosol concentrations are present, they can be an important source of aerosol particles for the boundary layer. Most particles are transported to the boundary layer by entrainment. However, it is found that mixed‐phase stratocumulus clouds, which often extend into the inversion layer, also can mediate the transport of particles into the boundary layer by activation at cloud top and evaporation below cloud base. Finally, the simulations also suggest that aerosol properties at the surface sometimes may not be good indicators of aerosol properties in the cloud layer.https://doi.org/10.1002/2017GL073808Arctic aerosolsmixed‐phase cloudsboundary layer |
| spellingShingle | Adele L. Igel Annica M. L. Ekman Caroline Leck Michael Tjernström Julien Savre Joseph Sedlar The free troposphere as a potential source of arctic boundary layer aerosol particles Geophysical Research Letters Arctic aerosols mixed‐phase clouds boundary layer |
| title | The free troposphere as a potential source of arctic boundary layer aerosol particles |
| title_full | The free troposphere as a potential source of arctic boundary layer aerosol particles |
| title_fullStr | The free troposphere as a potential source of arctic boundary layer aerosol particles |
| title_full_unstemmed | The free troposphere as a potential source of arctic boundary layer aerosol particles |
| title_short | The free troposphere as a potential source of arctic boundary layer aerosol particles |
| title_sort | free troposphere as a potential source of arctic boundary layer aerosol particles |
| topic | Arctic aerosols mixed‐phase clouds boundary layer |
| url | https://doi.org/10.1002/2017GL073808 |
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