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apps Other research product2020 English Funded by:AKA | Mechanisms, pathways and ..., EC | PEGASOS, AKA | ‘Centre of Excellence in ... +3 projectsAKA| Mechanisms, pathways and patchiness of the Arctic ecosystem responses and adaptation to changing climate / Consortium: ClimEco ,EC| PEGASOS ,AKA| ‘Centre of Excellence in Atmospheric Science - From Molecular and Biolocigal processes to The Global Climate’ ,EC| ACTRIS-2 ,EC| ATM-GTP ,AKA| Mechanisms, pathways and patchiness of the Arctic ecosystem responses and adaptation to changing climate / Consortium: ClimEcoLampilahti, Janne; Manninen, Hanna Elina; Leino, Katri; Väänänen, Riikka; Manninen, Antti; Buenrostro Mazon, Stephany; Nieminen, Tuomo; Leskinen, Matti; Enroth, Joonas; Bister, Marja; Zilitinkevich, Sergej; Kangasluoma, Juha; Järvinen, Heikki; Kerminen, Veli-Matti; Petäjä, Tuukka; Kulmala, Markku;Recent studies have shown the importance of new particle formation (NPF) to global cloud condensation nuclei (CCN) production, as well as to air pollution in megacities. In addition to the necessary presence of low-volatility vapors that can form new aerosol particles, both numerical and observational studies have shown that the dynamics of the planetary boundary layer (BL) plays an important role in NPF. Evidence from field observations suggests that roll vortices might be favorable for inducing NPF in a convective BL. However, direct observations and estimates of the potential importance of this phenomenon to the production of new aerosol particles are lacking. Here we show that rolls frequently induce NPF bursts along the horizontal circulations and that the small clusters and particles originating from these localized bursts grow in size similar to particles typically ascribed to atmospheric NPF that occur almost homogeneously at a regional scale. We outline a method to identify roll-induced NPF from measurements and, based on the collected data, estimate the impact of roll vortices on the overall aerosol particle production due to NPF at a boreal forest site (83 % ± 34 % and 26 % ± 8 % overall enhancement in particle formation for 3 and 10 nm particles, respectively). We conclude that the formation of roll vortices should be taken into account when estimating particle number budgets in the atmospheric BL.
Atmospheric Chemistr... arrow_drop_down Copernicus Publications; Atmospheric Chemistry and Physics (ACP)Other ORP type . 2020Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::dda9ff8662aec157d6c7eedb30c3544b&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Atmospheric Chemistr... arrow_drop_down Copernicus Publications; Atmospheric Chemistry and Physics (ACP)Other ORP type . 2020Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::dda9ff8662aec157d6c7eedb30c3544b&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euapps Other research productkeyboard_double_arrow_right Other ORP type 2018 English Funded by:EC | ERA-PLANET, EC | BACCHUS, AKA | ‘Centre of Excellence in ... +2 projectsEC| ERA-PLANET ,EC| BACCHUS ,AKA| ‘Centre of Excellence in Atmospheric Science - From Molecular and Biolocigal processes to The Global Climate’ ,AKA| NanoBioMass - Natural Secreted Nano Vesicles as a Source of Novel Biomass Products for Circular Economy / Consortium: NanoBiomass ,EC| ATM-GTPLeino, Katri; Lampilahti, Janne; Poutanen, Pyry; Väänänen, Riikka; Manninen, Antti; Buenrostro Mazon, Stephany; Dada, Lubna; Franck, Anna; Wimmer, Daniela; Aalto, Pasi P.; Ahonen, Lauri R.; Enroth, Joonas; Kangasluoma, Juha; Keronen, Petri; Korhonen, Frans; Laakso, Heikki; Matilainen, Teemu; Siivola, Erkki; Manninen, Hanna E.; Lehtipalo, Katrianne; Kerminen, Veli-Matti; Petäjä, Tuukka; Kulmala, Markku;This work presents airborne observations of sub-3 nm particles in the lower troposphere and investigates new particle formation (NPF) within an evolving boundary layer (BL). We studied particle concentrations together with supporting gas and meteorological data inside the planetary BL over a boreal forest site in Hyytiälä, southern Finland. The analysed data were collected during three flight measurement campaigns: May–June 2015, August 2015 and April–May 2017, including 27 morning and 26 afternoon vertical profiles. As a platform for the instrumentation, we used a Cessna 172 aircraft. The analysed flight data were collected horizontally within a 30 km distance from SMEAR II in Hyytiälä and vertically from 100 m above ground level up to 2700 m. The number concentration of 1.5–3 nm particles was observed to be, on average, the highest near the forest canopy top and to decrease with increasing altitude during the mornings of NPF event days. This indicates that the precursor vapours emitted by the forest play a key role in NPF in Hyytiälä. During daytime, newly formed particles were observed to grow in size and the particle population became more homogenous within the well-mixed BL in the afternoon. During undefined days with respect to NPF, we also detected an increase in concentration of 1.5–3 nm particles in the morning but not their growth in size, which indicates an interrupted NPF process during these undefined days. Vertical mixing was typically stronger during the NPF event days than during the undefined or non-event days. The results shed light on the connection between boundary layer dynamics and NPF.
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apps Other research product2020 English Funded by:AKA | Mechanisms, pathways and ..., EC | PEGASOS, AKA | ‘Centre of Excellence in ... +3 projectsAKA| Mechanisms, pathways and patchiness of the Arctic ecosystem responses and adaptation to changing climate / Consortium: ClimEco ,EC| PEGASOS ,AKA| ‘Centre of Excellence in Atmospheric Science - From Molecular and Biolocigal processes to The Global Climate’ ,EC| ACTRIS-2 ,EC| ATM-GTP ,AKA| Mechanisms, pathways and patchiness of the Arctic ecosystem responses and adaptation to changing climate / Consortium: ClimEcoLampilahti, Janne; Manninen, Hanna Elina; Leino, Katri; Väänänen, Riikka; Manninen, Antti; Buenrostro Mazon, Stephany; Nieminen, Tuomo; Leskinen, Matti; Enroth, Joonas; Bister, Marja; Zilitinkevich, Sergej; Kangasluoma, Juha; Järvinen, Heikki; Kerminen, Veli-Matti; Petäjä, Tuukka; Kulmala, Markku;Recent studies have shown the importance of new particle formation (NPF) to global cloud condensation nuclei (CCN) production, as well as to air pollution in megacities. In addition to the necessary presence of low-volatility vapors that can form new aerosol particles, both numerical and observational studies have shown that the dynamics of the planetary boundary layer (BL) plays an important role in NPF. Evidence from field observations suggests that roll vortices might be favorable for inducing NPF in a convective BL. However, direct observations and estimates of the potential importance of this phenomenon to the production of new aerosol particles are lacking. Here we show that rolls frequently induce NPF bursts along the horizontal circulations and that the small clusters and particles originating from these localized bursts grow in size similar to particles typically ascribed to atmospheric NPF that occur almost homogeneously at a regional scale. We outline a method to identify roll-induced NPF from measurements and, based on the collected data, estimate the impact of roll vortices on the overall aerosol particle production due to NPF at a boreal forest site (83 % ± 34 % and 26 % ± 8 % overall enhancement in particle formation for 3 and 10 nm particles, respectively). We conclude that the formation of roll vortices should be taken into account when estimating particle number budgets in the atmospheric BL.
Atmospheric Chemistr... arrow_drop_down Copernicus Publications; Atmospheric Chemistry and Physics (ACP)Other ORP type . 2020Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::dda9ff8662aec157d6c7eedb30c3544b&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Atmospheric Chemistr... arrow_drop_down Copernicus Publications; Atmospheric Chemistry and Physics (ACP)Other ORP type . 2020Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::dda9ff8662aec157d6c7eedb30c3544b&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euapps Other research productkeyboard_double_arrow_right Other ORP type 2018 English Funded by:EC | ERA-PLANET, EC | BACCHUS, AKA | ‘Centre of Excellence in ... +2 projectsEC| ERA-PLANET ,EC| BACCHUS ,AKA| ‘Centre of Excellence in Atmospheric Science - From Molecular and Biolocigal processes to The Global Climate’ ,AKA| NanoBioMass - Natural Secreted Nano Vesicles as a Source of Novel Biomass Products for Circular Economy / Consortium: NanoBiomass ,EC| ATM-GTPLeino, Katri; Lampilahti, Janne; Poutanen, Pyry; Väänänen, Riikka; Manninen, Antti; Buenrostro Mazon, Stephany; Dada, Lubna; Franck, Anna; Wimmer, Daniela; Aalto, Pasi P.; Ahonen, Lauri R.; Enroth, Joonas; Kangasluoma, Juha; Keronen, Petri; Korhonen, Frans; Laakso, Heikki; Matilainen, Teemu; Siivola, Erkki; Manninen, Hanna E.; Lehtipalo, Katrianne; Kerminen, Veli-Matti; Petäjä, Tuukka; Kulmala, Markku;This work presents airborne observations of sub-3 nm particles in the lower troposphere and investigates new particle formation (NPF) within an evolving boundary layer (BL). We studied particle concentrations together with supporting gas and meteorological data inside the planetary BL over a boreal forest site in Hyytiälä, southern Finland. The analysed data were collected during three flight measurement campaigns: May–June 2015, August 2015 and April–May 2017, including 27 morning and 26 afternoon vertical profiles. As a platform for the instrumentation, we used a Cessna 172 aircraft. The analysed flight data were collected horizontally within a 30 km distance from SMEAR II in Hyytiälä and vertically from 100 m above ground level up to 2700 m. The number concentration of 1.5–3 nm particles was observed to be, on average, the highest near the forest canopy top and to decrease with increasing altitude during the mornings of NPF event days. This indicates that the precursor vapours emitted by the forest play a key role in NPF in Hyytiälä. During daytime, newly formed particles were observed to grow in size and the particle population became more homogenous within the well-mixed BL in the afternoon. During undefined days with respect to NPF, we also detected an increase in concentration of 1.5–3 nm particles in the morning but not their growth in size, which indicates an interrupted NPF process during these undefined days. Vertical mixing was typically stronger during the NPF event days than during the undefined or non-event days. The results shed light on the connection between boundary layer dynamics and NPF.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=copernicuspu::9128f3284b10cf6a1f1aa1c2853df5c2&type=result"></script>'); --> </script>
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