New particle formation in air mass transported between two measurement sites in Northern Finland
International audience This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation events between these sites. In eastern air masses almost all events were observed to start ea...
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ftccsdartic:oai:HAL:hal-00301947v1 2023-12-03T10:27:46+01:00 New particle formation in air mass transported between two measurement sites in Northern Finland Komppula, M. Sihto, S.-L. Korhonen, H. Lihavainen, H. Kerminen, V.-M. Kulmala, M. Viisanen, Y. Finnish Meteorological Institute (FMI) Helsingin yliopisto = Helsingfors universitet = University of Helsinki 2005-11-22 https://hal.science/hal-00301947 https://hal.science/hal-00301947/document https://hal.science/hal-00301947/file/acpd-5-11929-2005.pdf en eng HAL CCSD European Geosciences Union hal-00301947 https://hal.science/hal-00301947 https://hal.science/hal-00301947/document https://hal.science/hal-00301947/file/acpd-5-11929-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301947 Atmospheric Chemistry and Physics Discussions, 2005, 5 (6), pp.11929-11963 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2005 ftccsdartic 2023-11-04T23:55:04Z International audience This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation events between these sites. In eastern air masses almost all events were observed to start earlier at the eastern station Värriö, whereas in western air masses most of the events were observed to start earlier at the western station Pallas. This demonstrates that particle formation in a certain air mass type depends not only on the diurnal variation of the parameters causing the phenomenon (such as photochemistry) but also on some properties carried by the air mass itself. The correlation in growth rates between the two sites was relatively good, which suggests that the amount of condensable vapour causing the growth must have been at about the same level in both sites. The value of condensation sink was frequently much higher at the downwind station. It seems that secondary particle formation related to biogenic sources dominate in many cases over the particle sinks during the air mass transport between the sites. Two cases of transport from Pallas to Värriö were further analysed with an aerosol dynamics model. The model was able to reproduce the observed nucleation events 250 km down-wind at Värriö but revealed some differences between the two cases. The simulated nucleation rates were in both cases similar but the organic concentration profiles that best reproduced the observations were different in the two cases indicating that divergent formation reactions may dominate under different conditions. The simulations also suggested that organic compounds were the main contributor to new particle growth, which offers a tentative hypothesis to the distinct features of new particles at the two sites: Air masses arriving from Atlantic Ocean typically spent approximately only ten hours over land before arriving at Pallas, and thus the time for the organic vapours to accumulate in the air and to interact with the ... Article in Journal/Newspaper Northern Finland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Komppula, M. Sihto, S.-L. Korhonen, H. Lihavainen, H. Kerminen, V.-M. Kulmala, M. Viisanen, Y. New particle formation in air mass transported between two measurement sites in Northern Finland |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation events between these sites. In eastern air masses almost all events were observed to start earlier at the eastern station Värriö, whereas in western air masses most of the events were observed to start earlier at the western station Pallas. This demonstrates that particle formation in a certain air mass type depends not only on the diurnal variation of the parameters causing the phenomenon (such as photochemistry) but also on some properties carried by the air mass itself. The correlation in growth rates between the two sites was relatively good, which suggests that the amount of condensable vapour causing the growth must have been at about the same level in both sites. The value of condensation sink was frequently much higher at the downwind station. It seems that secondary particle formation related to biogenic sources dominate in many cases over the particle sinks during the air mass transport between the sites. Two cases of transport from Pallas to Värriö were further analysed with an aerosol dynamics model. The model was able to reproduce the observed nucleation events 250 km down-wind at Värriö but revealed some differences between the two cases. The simulated nucleation rates were in both cases similar but the organic concentration profiles that best reproduced the observations were different in the two cases indicating that divergent formation reactions may dominate under different conditions. The simulations also suggested that organic compounds were the main contributor to new particle growth, which offers a tentative hypothesis to the distinct features of new particles at the two sites: Air masses arriving from Atlantic Ocean typically spent approximately only ten hours over land before arriving at Pallas, and thus the time for the organic vapours to accumulate in the air and to interact with the ... |
author2 |
Finnish Meteorological Institute (FMI) Helsingin yliopisto = Helsingfors universitet = University of Helsinki |
format |
Article in Journal/Newspaper |
author |
Komppula, M. Sihto, S.-L. Korhonen, H. Lihavainen, H. Kerminen, V.-M. Kulmala, M. Viisanen, Y. |
author_facet |
Komppula, M. Sihto, S.-L. Korhonen, H. Lihavainen, H. Kerminen, V.-M. Kulmala, M. Viisanen, Y. |
author_sort |
Komppula, M. |
title |
New particle formation in air mass transported between two measurement sites in Northern Finland |
title_short |
New particle formation in air mass transported between two measurement sites in Northern Finland |
title_full |
New particle formation in air mass transported between two measurement sites in Northern Finland |
title_fullStr |
New particle formation in air mass transported between two measurement sites in Northern Finland |
title_full_unstemmed |
New particle formation in air mass transported between two measurement sites in Northern Finland |
title_sort |
new particle formation in air mass transported between two measurement sites in northern finland |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00301947 https://hal.science/hal-00301947/document https://hal.science/hal-00301947/file/acpd-5-11929-2005.pdf |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301947 Atmospheric Chemistry and Physics Discussions, 2005, 5 (6), pp.11929-11963 |
op_relation |
hal-00301947 https://hal.science/hal-00301947 https://hal.science/hal-00301947/document https://hal.science/hal-00301947/file/acpd-5-11929-2005.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1784277655054450688 |