Measurements of optical properties of atmospheric aerosols in Northern Finland
Three years of continuous measurements of aerosol optical properties and simultaneous aerosol number size distribution measurements at Pallas GAW station, a remote subarctic site in the northern border of the boreal forest zone, have been analysed. The scattering coefficient at 550 nm varied from 0....
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-6-1155-2006 https://www.atmos-chem-phys.net/6/1155/2006/ |
id |
ftcopernicus:oai:publications.copernicus.org:acp4281 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:acp4281 2023-05-15T17:05:00+02:00 Measurements of optical properties of atmospheric aerosols in Northern Finland Aaltonen, V. Lihavainen, H. Kerminen, V.-M. Komppula, M. Hatakka, J. Eneroth, K. Kulmala, M. Viisanen, Y. 2018-06-28 application/pdf https://doi.org/10.5194/acp-6-1155-2006 https://www.atmos-chem-phys.net/6/1155/2006/ eng eng doi:10.5194/acp-6-1155-2006 https://www.atmos-chem-phys.net/6/1155/2006/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-6-1155-2006 2019-12-24T09:58:55Z Three years of continuous measurements of aerosol optical properties and simultaneous aerosol number size distribution measurements at Pallas GAW station, a remote subarctic site in the northern border of the boreal forest zone, have been analysed. The scattering coefficient at 550 nm varied from 0.2 to 94.4 Mm −1 with an average of 7.1±8.6 Mm −1 . Both the scattering and backscattering coefficients had a clear seasonal cycle with an autumn minimum and a 4–5times higher summer maximum. The scattering was dominated by submicron aerosols and especially so during late summer and autumn. The Ångström exponent had a clear seasonal pattern with maximum values in late summer and minimum values during wintertime. The highest hemispheric backscattering fraction values were observed in autumn. To analyse the influence of air mass origin on the aerosol optical properties a trajectory climatology was applied to the Pallas aerosol data. The most polluted trajectory patterns represented air masses from the Kola Peninsula, Scandinavia and Russia as well as long-range transport from Britain and Eastern Europe. These air masses had the largest average scattering and backscattering coefficients for all seasons. Higher than average values of the Ångström exponent were also observed in connection with transport from these areas. Text kola peninsula Northern Finland Subarctic Copernicus Publications: E-Journals Kola Peninsula Atmospheric Chemistry and Physics 6 5 1155 1164 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Three years of continuous measurements of aerosol optical properties and simultaneous aerosol number size distribution measurements at Pallas GAW station, a remote subarctic site in the northern border of the boreal forest zone, have been analysed. The scattering coefficient at 550 nm varied from 0.2 to 94.4 Mm −1 with an average of 7.1±8.6 Mm −1 . Both the scattering and backscattering coefficients had a clear seasonal cycle with an autumn minimum and a 4–5times higher summer maximum. The scattering was dominated by submicron aerosols and especially so during late summer and autumn. The Ångström exponent had a clear seasonal pattern with maximum values in late summer and minimum values during wintertime. The highest hemispheric backscattering fraction values were observed in autumn. To analyse the influence of air mass origin on the aerosol optical properties a trajectory climatology was applied to the Pallas aerosol data. The most polluted trajectory patterns represented air masses from the Kola Peninsula, Scandinavia and Russia as well as long-range transport from Britain and Eastern Europe. These air masses had the largest average scattering and backscattering coefficients for all seasons. Higher than average values of the Ångström exponent were also observed in connection with transport from these areas. |
format |
Text |
author |
Aaltonen, V. Lihavainen, H. Kerminen, V.-M. Komppula, M. Hatakka, J. Eneroth, K. Kulmala, M. Viisanen, Y. |
spellingShingle |
Aaltonen, V. Lihavainen, H. Kerminen, V.-M. Komppula, M. Hatakka, J. Eneroth, K. Kulmala, M. Viisanen, Y. Measurements of optical properties of atmospheric aerosols in Northern Finland |
author_facet |
Aaltonen, V. Lihavainen, H. Kerminen, V.-M. Komppula, M. Hatakka, J. Eneroth, K. Kulmala, M. Viisanen, Y. |
author_sort |
Aaltonen, V. |
title |
Measurements of optical properties of atmospheric aerosols in Northern Finland |
title_short |
Measurements of optical properties of atmospheric aerosols in Northern Finland |
title_full |
Measurements of optical properties of atmospheric aerosols in Northern Finland |
title_fullStr |
Measurements of optical properties of atmospheric aerosols in Northern Finland |
title_full_unstemmed |
Measurements of optical properties of atmospheric aerosols in Northern Finland |
title_sort |
measurements of optical properties of atmospheric aerosols in northern finland |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-6-1155-2006 https://www.atmos-chem-phys.net/6/1155/2006/ |
geographic |
Kola Peninsula |
geographic_facet |
Kola Peninsula |
genre |
kola peninsula Northern Finland Subarctic |
genre_facet |
kola peninsula Northern Finland Subarctic |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-6-1155-2006 https://www.atmos-chem-phys.net/6/1155/2006/ |
op_doi |
https://doi.org/10.5194/acp-6-1155-2006 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
6 |
container_issue |
5 |
container_start_page |
1155 |
op_container_end_page |
1164 |
_version_ |
1766059363319939072 |