Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events
Field observations of new particle formation and the subsequent particle growth are typically only possible at a fixed measurement location, and hence do not follow the temporal evolution of an air parcel in a Lagrangian sense. Standard analysis for determining formation and growth rates requires th...
Published in: | Tellus B: Chemical and Physical Meteorology |
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Main Authors: | , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Taylor & Francis
2016
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Online Access: | http://hdl.handle.net/10138/163119 |
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Open Polar |
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HELDA – University of Helsinki Open Repository |
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ftunivhelsihelda |
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English |
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new particle formation spatial variation interpretation of measurements SIZE DISTRIBUTION LONG-TERM MEASUREMENT SITES NORTHERN FINLAND VERTICAL EXTENT GROWTH NUCLEATION DISTRIBUTIONS ATMOSPHERE DYNAMICS 114 Physical sciences |
spellingShingle |
new particle formation spatial variation interpretation of measurements SIZE DISTRIBUTION LONG-TERM MEASUREMENT SITES NORTHERN FINLAND VERTICAL EXTENT GROWTH NUCLEATION DISTRIBUTIONS ATMOSPHERE DYNAMICS 114 Physical sciences Kivekäs, Niku Carpman, Jimmie Roldin, Pontus Leppa, Johannes O'Connor, Ewan Kristensson, Adam Asmi, Eija Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events |
topic_facet |
new particle formation spatial variation interpretation of measurements SIZE DISTRIBUTION LONG-TERM MEASUREMENT SITES NORTHERN FINLAND VERTICAL EXTENT GROWTH NUCLEATION DISTRIBUTIONS ATMOSPHERE DYNAMICS 114 Physical sciences |
description |
Field observations of new particle formation and the subsequent particle growth are typically only possible at a fixed measurement location, and hence do not follow the temporal evolution of an air parcel in a Lagrangian sense. Standard analysis for determining formation and growth rates requires that the time-dependent formation rate and growth rate of the particles are spatially invariant; air parcel advection means that the observed temporal evolution of the particle size distribution at a fixed measurement location may not represent the true evolution if there are spatial variations in the formation and growth rates. Here we present a zero-dimensional aerosol box model coupled with one-dimensional atmospheric flow to describe the impact of advection on the evolution of simulated new particle formation events. Wind speed, particle formation rates and growth rates are input parameters that can vary as a function of time and location, using wind speed to connect location to time. The output simulates measurements at a fixed location; formation and growth rates of the particle mode can then be calculated from the simulated observations at a stationary point for different scenarios and be compared with the 'true' input parameters. Hence, we can investigate how spatial variations in the formation and growth rates of new particles would appear in observations of particle number size distributions at a fixed measurement site. We show that the particle size distribution and growth rate at a fixed location is dependent on the formation and growth parameters upwind, even if local conditions do not vary. We also show that different input parameters used may result in very similar simulated measurements. Erroneous interpretation of observations in terms of particle formation and growth rates, and the time span and areal extent of new particle formation, is possible if the spatial effects are not accounted for. Peer reviewed |
author2 |
Department of Physics |
format |
Article in Journal/Newspaper |
author |
Kivekäs, Niku Carpman, Jimmie Roldin, Pontus Leppa, Johannes O'Connor, Ewan Kristensson, Adam Asmi, Eija |
author_facet |
Kivekäs, Niku Carpman, Jimmie Roldin, Pontus Leppa, Johannes O'Connor, Ewan Kristensson, Adam Asmi, Eija |
author_sort |
Kivekäs, Niku |
title |
Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events |
title_short |
Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events |
title_full |
Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events |
title_fullStr |
Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events |
title_full_unstemmed |
Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events |
title_sort |
coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events |
publisher |
Taylor & Francis |
publishDate |
2016 |
url |
http://hdl.handle.net/10138/163119 |
genre |
Arctic Northern Finland |
genre_facet |
Arctic Northern Finland |
op_relation |
10.3402/tellusb.v68.29706 This work was supported by the Academy of Finland through The Centre of Excellence in Atmospheric Science - From Molecular and Biological processes to The Global Climate, the Nordic top-level research initiative CRAICC (Cryosphere-atmosphere interactions in a changing Arctic climate), and by the Maj and Tor Nessling Foundation. The study is also a contribution to the Lund University Strategic Research Areas: Modeling the Regional and Global Earth System (MERGE). J. Leppa would like to acknowledge the funding received from the Magnus Ehrnrooth Foundation, the Jane and Aatos Erkko Foundation and the Emil Aaltonen Foundation. P. Roldin would like to acknowledge the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning FORMAS (Project No. 214-2014-1445). Kivekäs , N , Carpman , J , Roldin , P , Leppa , J , O'Connor , E , Kristensson , A & Asmi , E 2016 , ' Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events ' , Tellus. Series B: Chemical and Physical Meteorology , vol. 68 , 29706 . https://doi.org/10.3402/tellusb.v68.29706 85010934005 6d67361f-57e1-41c1-a108-8382a8e14e52 http://hdl.handle.net/10138/163119 000375876100001 |
op_rights |
cc_by_nc openAccess info:eu-repo/semantics/openAccess |
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Tellus B: Chemical and Physical Meteorology |
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68 |
container_issue |
1 |
container_start_page |
29706 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/163119 2024-01-07T09:40:47+01:00 Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events Kivekäs, Niku Carpman, Jimmie Roldin, Pontus Leppa, Johannes O'Connor, Ewan Kristensson, Adam Asmi, Eija Department of Physics 2016-06-02T07:09:01Z 14 application/pdf http://hdl.handle.net/10138/163119 eng eng Taylor & Francis 10.3402/tellusb.v68.29706 This work was supported by the Academy of Finland through The Centre of Excellence in Atmospheric Science - From Molecular and Biological processes to The Global Climate, the Nordic top-level research initiative CRAICC (Cryosphere-atmosphere interactions in a changing Arctic climate), and by the Maj and Tor Nessling Foundation. The study is also a contribution to the Lund University Strategic Research Areas: Modeling the Regional and Global Earth System (MERGE). J. Leppa would like to acknowledge the funding received from the Magnus Ehrnrooth Foundation, the Jane and Aatos Erkko Foundation and the Emil Aaltonen Foundation. P. Roldin would like to acknowledge the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning FORMAS (Project No. 214-2014-1445). Kivekäs , N , Carpman , J , Roldin , P , Leppa , J , O'Connor , E , Kristensson , A & Asmi , E 2016 , ' Coupling an aerosol box model with one-dimensional flow : a tool for understanding observations of new particle formation events ' , Tellus. Series B: Chemical and Physical Meteorology , vol. 68 , 29706 . https://doi.org/10.3402/tellusb.v68.29706 85010934005 6d67361f-57e1-41c1-a108-8382a8e14e52 http://hdl.handle.net/10138/163119 000375876100001 cc_by_nc openAccess info:eu-repo/semantics/openAccess new particle formation spatial variation interpretation of measurements SIZE DISTRIBUTION LONG-TERM MEASUREMENT SITES NORTHERN FINLAND VERTICAL EXTENT GROWTH NUCLEATION DISTRIBUTIONS ATMOSPHERE DYNAMICS 114 Physical sciences Article publishedVersion 2016 ftunivhelsihelda 2023-12-14T00:14:10Z Field observations of new particle formation and the subsequent particle growth are typically only possible at a fixed measurement location, and hence do not follow the temporal evolution of an air parcel in a Lagrangian sense. Standard analysis for determining formation and growth rates requires that the time-dependent formation rate and growth rate of the particles are spatially invariant; air parcel advection means that the observed temporal evolution of the particle size distribution at a fixed measurement location may not represent the true evolution if there are spatial variations in the formation and growth rates. Here we present a zero-dimensional aerosol box model coupled with one-dimensional atmospheric flow to describe the impact of advection on the evolution of simulated new particle formation events. Wind speed, particle formation rates and growth rates are input parameters that can vary as a function of time and location, using wind speed to connect location to time. The output simulates measurements at a fixed location; formation and growth rates of the particle mode can then be calculated from the simulated observations at a stationary point for different scenarios and be compared with the 'true' input parameters. Hence, we can investigate how spatial variations in the formation and growth rates of new particles would appear in observations of particle number size distributions at a fixed measurement site. We show that the particle size distribution and growth rate at a fixed location is dependent on the formation and growth parameters upwind, even if local conditions do not vary. We also show that different input parameters used may result in very similar simulated measurements. Erroneous interpretation of observations in terms of particle formation and growth rates, and the time span and areal extent of new particle formation, is possible if the spatial effects are not accounted for. Peer reviewed Article in Journal/Newspaper Arctic Northern Finland HELDA – University of Helsinki Open Repository Tellus B: Chemical and Physical Meteorology 68 1 29706 |