The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic
We present an aerosol cloud condensation nuclei (CCN) closure study over the north-east Atlantic Ocean using six approximating methods. The CCN number concentrations (N-CCN) were measured at four discrete supersaturations (SSs; 0.25 %, 0.5 %, 0.75% and 1.0 %). Concurrently, aerosol number size distr...
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COPERNICUS GESELLSCHAFT MBH
2021
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ftchinacascieeca:oai:ir.ieecas.cn:361006/16770 2023-06-11T04:15:08+02:00 The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic Xu, Wei Fossum, Kirsten N. Ovadnevaite, Jurgita Lin, Chunshui Huang, Ru-Jin O'Dowd, Colin Ceburnis, Darius 2021-06-08 http://ir.ieecas.cn/handle/361006/16770 https://doi.org/10.5194/acp-21-8655-2021 英语 eng COPERNICUS GESELLSCHAFT MBH ATMOSPHERIC CHEMISTRY AND PHYSICS http://ir.ieecas.cn/handle/361006/16770 doi:10.5194/acp-21-8655-2021 SINGLE-PARAMETER REPRESENTATION BOREAL FOREST ENVIRONMENT ATMOSPHERIC AEROSOL CCN ACTIVITY CHEMICAL-COMPOSITION MACE HEAD NUMBER CONCENTRATION GROWTH PARTICLES CHEMISTRY Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Environmental Sciences 期刊论文 2021 ftchinacascieeca https://doi.org/10.5194/acp-21-8655-2021 2023-05-08T13:25:19Z We present an aerosol cloud condensation nuclei (CCN) closure study over the north-east Atlantic Ocean using six approximating methods. The CCN number concentrations (N-CCN) were measured at four discrete supersaturations (SSs; 0.25 %, 0.5 %, 0.75% and 1.0 %). Concurrently, aerosol number size distribution, sub-saturation hygroscopic growth factor and bulk PM1 chemical composition were obtained at matching time resolution and after a careful data validation exercise. Method A used a constant bulk hygroscopicity parameter kappa of 0.3; method B used bulk PM1 chemical composition measured by an aerosol mass spectrometer (AMS); method C utilised a single growth factor (GF) size (165 nm) measured by a humidified tandem differential mobility analyser (HTDMA); method D utilised size-dependent GFs measured at 35, 50, 75, 110 and 165 nm; method E divided the aerosol population into three hygroscopicity modes (near-hydrophobic, more-hygroscopic and sea-salt modes), and the total CCN number in each mode was cumulatively added up; method F used the full-size-scale GF probability density function (GF-PDF) in the most complex approach. The studied periods included high-biological-activity and low-biological-activity seasons in clean marine and polluted continental air masses to represent and discuss the most contrasting aerosol populations. Overall, a good agreement was found between estimated and measured NCCN with linear regression slopes ranging from 0.64 to 1.6. The temporal variability was captured very well, with Pearson's R value ranging from 0.76 to 0.98 depending on the method and air mass type. We further compared the results of using different methods to quantify the impact of size-dependent hygroscopicity and mixing state and found that ignoring size-dependent hygroscopicity induced overestimation of N-CCN by up to 12 %, and ignoring a mixing state induced overestimation of NCCN by up to 15 %. The error induced by assuming an internal mixing in highly polluted cases was largely eliminated by dividing the full ... Report North East Atlantic Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) Mace ENVELOPE(155.883,155.883,-81.417,-81.417) Atmospheric Chemistry and Physics 21 11 8655 8675 |
institution |
Open Polar |
collection |
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascieeca |
language |
English |
topic |
SINGLE-PARAMETER REPRESENTATION BOREAL FOREST ENVIRONMENT ATMOSPHERIC AEROSOL CCN ACTIVITY CHEMICAL-COMPOSITION MACE HEAD NUMBER CONCENTRATION GROWTH PARTICLES CHEMISTRY Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Environmental Sciences |
spellingShingle |
SINGLE-PARAMETER REPRESENTATION BOREAL FOREST ENVIRONMENT ATMOSPHERIC AEROSOL CCN ACTIVITY CHEMICAL-COMPOSITION MACE HEAD NUMBER CONCENTRATION GROWTH PARTICLES CHEMISTRY Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Environmental Sciences Xu, Wei Fossum, Kirsten N. Ovadnevaite, Jurgita Lin, Chunshui Huang, Ru-Jin O'Dowd, Colin Ceburnis, Darius The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic |
topic_facet |
SINGLE-PARAMETER REPRESENTATION BOREAL FOREST ENVIRONMENT ATMOSPHERIC AEROSOL CCN ACTIVITY CHEMICAL-COMPOSITION MACE HEAD NUMBER CONCENTRATION GROWTH PARTICLES CHEMISTRY Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Environmental Sciences |
description |
We present an aerosol cloud condensation nuclei (CCN) closure study over the north-east Atlantic Ocean using six approximating methods. The CCN number concentrations (N-CCN) were measured at four discrete supersaturations (SSs; 0.25 %, 0.5 %, 0.75% and 1.0 %). Concurrently, aerosol number size distribution, sub-saturation hygroscopic growth factor and bulk PM1 chemical composition were obtained at matching time resolution and after a careful data validation exercise. Method A used a constant bulk hygroscopicity parameter kappa of 0.3; method B used bulk PM1 chemical composition measured by an aerosol mass spectrometer (AMS); method C utilised a single growth factor (GF) size (165 nm) measured by a humidified tandem differential mobility analyser (HTDMA); method D utilised size-dependent GFs measured at 35, 50, 75, 110 and 165 nm; method E divided the aerosol population into three hygroscopicity modes (near-hydrophobic, more-hygroscopic and sea-salt modes), and the total CCN number in each mode was cumulatively added up; method F used the full-size-scale GF probability density function (GF-PDF) in the most complex approach. The studied periods included high-biological-activity and low-biological-activity seasons in clean marine and polluted continental air masses to represent and discuss the most contrasting aerosol populations. Overall, a good agreement was found between estimated and measured NCCN with linear regression slopes ranging from 0.64 to 1.6. The temporal variability was captured very well, with Pearson's R value ranging from 0.76 to 0.98 depending on the method and air mass type. We further compared the results of using different methods to quantify the impact of size-dependent hygroscopicity and mixing state and found that ignoring size-dependent hygroscopicity induced overestimation of N-CCN by up to 12 %, and ignoring a mixing state induced overestimation of NCCN by up to 15 %. The error induced by assuming an internal mixing in highly polluted cases was largely eliminated by dividing the full ... |
format |
Report |
author |
Xu, Wei Fossum, Kirsten N. Ovadnevaite, Jurgita Lin, Chunshui Huang, Ru-Jin O'Dowd, Colin Ceburnis, Darius |
author_facet |
Xu, Wei Fossum, Kirsten N. Ovadnevaite, Jurgita Lin, Chunshui Huang, Ru-Jin O'Dowd, Colin Ceburnis, Darius |
author_sort |
Xu, Wei |
title |
The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic |
title_short |
The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic |
title_full |
The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic |
title_fullStr |
The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic |
title_full_unstemmed |
The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic |
title_sort |
impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east atlantic |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2021 |
url |
http://ir.ieecas.cn/handle/361006/16770 https://doi.org/10.5194/acp-21-8655-2021 |
long_lat |
ENVELOPE(155.883,155.883,-81.417,-81.417) |
geographic |
Mace |
geographic_facet |
Mace |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
ATMOSPHERIC CHEMISTRY AND PHYSICS http://ir.ieecas.cn/handle/361006/16770 doi:10.5194/acp-21-8655-2021 |
op_doi |
https://doi.org/10.5194/acp-21-8655-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
11 |
container_start_page |
8655 |
op_container_end_page |
8675 |
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1768371714877554688 |