Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol
The oxidation of biogenic volatile organic compounds (BVOCs) gives a range of products, from semi-volatile to extremely low-volatility compounds. To treat the interaction of these secondary organic vapours with the particle phase, global aerosol microphysics models generally use either a thermodynam...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/175022 2024-01-07T09:40:47+01:00 Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol Scott, C. E. Spracklen, D. V. Pierce, J. R. Riipinen, I. D'Andrea, S. D. Rap, A. Carslaw, K. S. Forster, P. M. Artaxo, P. Kulmala, M. Rizzo, L. V. Swietlicki, E. Mann, G. W. Pringle, K. J. Department of Physics 2017-02-09T14:14:01Z 13 application/pdf http://hdl.handle.net/10138/175022 eng eng COPERNICUS GESELLSCHAFT MBH 10.5194/acp-15-12989-2015 We acknowledge support from NERC (NE/H524673/1, NE/J004723/1, NE/G015015/1, NE/K015966/1), EPSRC (EP/I014721/1), ERC (227463-ATMNUCLE). Aerosol measurements at Hyytiala were supported by the Academy of Finland Centre of Excellence (1118615 and 1127372), and the Cryosphere-Atmosphere Interactions in a Changing Arctic Climate (CRAICC) programme. Aerosol measurements in the Amazon were supported by Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP - AEROCLIMA 08/58100-2), Conselho Nacional de Desenvolvimento Cientifico (CNPq) and European Integrated FP6 Project on Aerosol Cloud Climate and Air Quality Interactions (EUCAARI - 34684), under the scope of LBA experiment; we thank INPA (Instituto Nacional de Pesquisas da Amazonia) for the coordination work of the LBA Experiment. Scott , C E , Spracklen , D V , Pierce , J R , Riipinen , I , D'Andrea , S D , Rap , A , Carslaw , K S , Forster , P M , Artaxo , P , Kulmala , M , Rizzo , L V , Swietlicki , E , Mann , G W & Pringle , K J 2015 , ' Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol ' , Atmospheric Chemistry and Physics , vol. 15 , no. 22 , pp. 12989-13001 . https://doi.org/10.5194/acp-15-12989-2015 84948187324 6644d4dc-8e63-4a41-b653-3671dd352049 http://hdl.handle.net/10138/175022 000365977100017 cc_by openAccess info:eu-repo/semantics/openAccess NUCLEATION MODE PARTICLES CHEMICAL-TRANSPORT MODEL CLOUD DROPLET FORMATION GLOBAL CLIMATE MODELS NUMBER CONCENTRATIONS CCN CONCENTRATIONS BOUNDARY-LAYER SULFURIC-ACID GLOMAP-MODE GROWTH 114 Physical sciences Article publishedVersion 2017 ftunivhelsihelda 2023-12-14T00:04:27Z The oxidation of biogenic volatile organic compounds (BVOCs) gives a range of products, from semi-volatile to extremely low-volatility compounds. To treat the interaction of these secondary organic vapours with the particle phase, global aerosol microphysics models generally use either a thermodynamic partitioning approach (assuming instant equilibrium between semi-volatile oxidation products and the particle phase) or a kinetic approach (accounting for the size dependence of condensation). We show that model treatment of the partitioning of biogenic organic vapours into the particle phase, and consequent distribution of material across the size distribution, controls the magnitude of the first aerosol indirect effect (AIE) due to biogenic secondary organic aerosol (SOA). With a kinetic partitioning approach, SOA is distributed according to the existing condensation sink, enhancing the growth of the smallest particles, i.e. those in the nucleation mode. This process tends to increase cloud droplet number concentrations in the presence of biogenic SOA. By contrast, an approach that distributes SOA according to pre-existing organic mass restricts the growth of the smallest particles, limiting the number that are able to form cloud droplets. With an organically mediated new particle formation mechanism, applying a mass-based rather than a kinetic approach to partitioning reduces our calculated global mean AIE due to biogenic SOA by 24 %. Our results suggest that the mechanisms driving organic partitioning need to be fully understood in order to accurately describe the climatic effects of SOA. Peer reviewed Article in Journal/Newspaper Arctic The Cryosphere HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
NUCLEATION MODE PARTICLES CHEMICAL-TRANSPORT MODEL CLOUD DROPLET FORMATION GLOBAL CLIMATE MODELS NUMBER CONCENTRATIONS CCN CONCENTRATIONS BOUNDARY-LAYER SULFURIC-ACID GLOMAP-MODE GROWTH 114 Physical sciences |
spellingShingle |
NUCLEATION MODE PARTICLES CHEMICAL-TRANSPORT MODEL CLOUD DROPLET FORMATION GLOBAL CLIMATE MODELS NUMBER CONCENTRATIONS CCN CONCENTRATIONS BOUNDARY-LAYER SULFURIC-ACID GLOMAP-MODE GROWTH 114 Physical sciences Scott, C. E. Spracklen, D. V. Pierce, J. R. Riipinen, I. D'Andrea, S. D. Rap, A. Carslaw, K. S. Forster, P. M. Artaxo, P. Kulmala, M. Rizzo, L. V. Swietlicki, E. Mann, G. W. Pringle, K. J. Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol |
topic_facet |
NUCLEATION MODE PARTICLES CHEMICAL-TRANSPORT MODEL CLOUD DROPLET FORMATION GLOBAL CLIMATE MODELS NUMBER CONCENTRATIONS CCN CONCENTRATIONS BOUNDARY-LAYER SULFURIC-ACID GLOMAP-MODE GROWTH 114 Physical sciences |
description |
The oxidation of biogenic volatile organic compounds (BVOCs) gives a range of products, from semi-volatile to extremely low-volatility compounds. To treat the interaction of these secondary organic vapours with the particle phase, global aerosol microphysics models generally use either a thermodynamic partitioning approach (assuming instant equilibrium between semi-volatile oxidation products and the particle phase) or a kinetic approach (accounting for the size dependence of condensation). We show that model treatment of the partitioning of biogenic organic vapours into the particle phase, and consequent distribution of material across the size distribution, controls the magnitude of the first aerosol indirect effect (AIE) due to biogenic secondary organic aerosol (SOA). With a kinetic partitioning approach, SOA is distributed according to the existing condensation sink, enhancing the growth of the smallest particles, i.e. those in the nucleation mode. This process tends to increase cloud droplet number concentrations in the presence of biogenic SOA. By contrast, an approach that distributes SOA according to pre-existing organic mass restricts the growth of the smallest particles, limiting the number that are able to form cloud droplets. With an organically mediated new particle formation mechanism, applying a mass-based rather than a kinetic approach to partitioning reduces our calculated global mean AIE due to biogenic SOA by 24 %. Our results suggest that the mechanisms driving organic partitioning need to be fully understood in order to accurately describe the climatic effects of SOA. Peer reviewed |
author2 |
Department of Physics |
format |
Article in Journal/Newspaper |
author |
Scott, C. E. Spracklen, D. V. Pierce, J. R. Riipinen, I. D'Andrea, S. D. Rap, A. Carslaw, K. S. Forster, P. M. Artaxo, P. Kulmala, M. Rizzo, L. V. Swietlicki, E. Mann, G. W. Pringle, K. J. |
author_facet |
Scott, C. E. Spracklen, D. V. Pierce, J. R. Riipinen, I. D'Andrea, S. D. Rap, A. Carslaw, K. S. Forster, P. M. Artaxo, P. Kulmala, M. Rizzo, L. V. Swietlicki, E. Mann, G. W. Pringle, K. J. |
author_sort |
Scott, C. E. |
title |
Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol |
title_short |
Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol |
title_full |
Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol |
title_fullStr |
Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol |
title_full_unstemmed |
Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol |
title_sort |
impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2017 |
url |
http://hdl.handle.net/10138/175022 |
genre |
Arctic The Cryosphere |
genre_facet |
Arctic The Cryosphere |
op_relation |
10.5194/acp-15-12989-2015 We acknowledge support from NERC (NE/H524673/1, NE/J004723/1, NE/G015015/1, NE/K015966/1), EPSRC (EP/I014721/1), ERC (227463-ATMNUCLE). Aerosol measurements at Hyytiala were supported by the Academy of Finland Centre of Excellence (1118615 and 1127372), and the Cryosphere-Atmosphere Interactions in a Changing Arctic Climate (CRAICC) programme. Aerosol measurements in the Amazon were supported by Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP - AEROCLIMA 08/58100-2), Conselho Nacional de Desenvolvimento Cientifico (CNPq) and European Integrated FP6 Project on Aerosol Cloud Climate and Air Quality Interactions (EUCAARI - 34684), under the scope of LBA experiment; we thank INPA (Instituto Nacional de Pesquisas da Amazonia) for the coordination work of the LBA Experiment. Scott , C E , Spracklen , D V , Pierce , J R , Riipinen , I , D'Andrea , S D , Rap , A , Carslaw , K S , Forster , P M , Artaxo , P , Kulmala , M , Rizzo , L V , Swietlicki , E , Mann , G W & Pringle , K J 2015 , ' Impact of gas-to-particle partitioning approaches on the simulated radiative effects of biogenic secondary organic aerosol ' , Atmospheric Chemistry and Physics , vol. 15 , no. 22 , pp. 12989-13001 . https://doi.org/10.5194/acp-15-12989-2015 84948187324 6644d4dc-8e63-4a41-b653-3671dd352049 http://hdl.handle.net/10138/175022 000365977100017 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
_version_ |
1787421580748390400 |