| The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic | |
| Xu, Wei1,2,3; Fossum, Kirsten N.1; Ovadnevaite, Jurgita1; Lin, Chunshui1,2,3; Huang, Ru-Jin2,3; O'Dowd, Colin1; Ceburnis, Darius1 | |
| Corresponding Author | Huang, Ru-Jin(rujin.huang@ieecas.cn) ; O'Dowd, Colin(colin.odowd@nuigalway.ie) |
| 2021-06-08 | |
| Source Publication | ATMOSPHERIC CHEMISTRY AND PHYSICS
 |
| ISSN | 1680-7316 |
| Volume | 21Issue:11Pages:8655-8675 |
| Abstract | 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 GF-PDF into three conventional hygroscopic modes, while assuming an internal mixing in clean marine aerosol did not induce significant error. |
| DOI | 10.5194/acp-21-8655-2021 |
| WOS Keyword | SINGLE-PARAMETER REPRESENTATION ; BOREAL FOREST ENVIRONMENT ; ATMOSPHERIC AEROSOL ; CCN ACTIVITY ; CHEMICAL-COMPOSITION ; MACE HEAD ; NUMBER CONCENTRATION ; GROWTH ; PARTICLES ; CHEMISTRY |
| Indexed By | SCI ; SCI |
| Language | 英语 |
| Funding Project | China Scholarship Council[201706310154] ; Environmental Protection Agency[AEROSOURCE] ; Environmental Protection Agency[2016-CCRP-MS31] ; COST Action (COLOSSAL)[CA16109] ; Science Foundation Ireland (Research Centre for Energy, Climate and Marine research and innovation)[12/RC/2302_P2] |
| WOS Research Area | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| Funding Organization | China Scholarship Council ; Environmental Protection Agency ; COST Action (COLOSSAL) ; Science Foundation Ireland (Research Centre for Energy, Climate and Marine research and innovation) |
| WOS Subject | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| WOS ID | WOS:000661354600003 |
| Publisher | COPERNICUS GESELLSCHAFT MBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ieecas.cn/handle/361006/16772 |
| Collection | 粉尘与环境研究室 |
| Corresponding Author | Huang, Ru-Jin; O'Dowd, Colin |
| Affiliation | 1.Natl Univ Ireland Galway, Ryan Inst, Sch Phys, Ctr Climate & Air Pollut Studies, Galway, Ireland 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian, Peoples R China |
| Recommended Citation GB/T 7714 | Xu, Wei,Fossum, Kirsten N.,Ovadnevaite, Jurgita,et al. The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2021,21(11):8655-8675. |
| APA | Xu, Wei.,Fossum, Kirsten N..,Ovadnevaite, Jurgita.,Lin, Chunshui.,Huang, Ru-Jin.,...&Ceburnis, Darius.(2021).The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11),8655-8675. |
| MLA | Xu, Wei,et al."The impact of aerosol size-dependent hygroscopicity and mixing state on the cloud condensation nuclei potential over the north-east Atlantic".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021):8655-8675. |
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