Drivers of droplet formation in east Mediterranean orographic clouds
文献类型：期刊论文
| 作者 | Foskinis, Romanos4,5,6,7; Motos, Ghislain6; Gini, Maria I.7; Zografou, Olga7; Gao, Kunfeng6; Vratolis, Stergios7; Granakis, Konstantinos7,9; Vakkari, Ville2,11; Violaki, Kalliopi6; Aktypis, Andreas5 |
| 刊名 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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| 出版日期 | 2024-09-05 |
| 卷号 | 24 |
| ISSN号 | 1680-7316 |
| DOI | 10.5194/acp-24-9827-2024 |
| 通讯作者 | Papayannis, Alexandros(apdlidar@mail.ntua.gr) ; Nenes, Athanasios(athanasios.nenes@epfl.ch) |
| 英文摘要 | The purpose of this study is to understand the drivers of cloud droplet formation in orographic clouds. We used a combination of modeling, in situ, and remote sensing measurements at the high-altitude Helmos Hellenic Atmospheric Aerosol and Climate Change ((HAC)2) station, which is located at the top of Mt. Helmos (1314 m above sea level), Greece, during the Cloud-AerosoL InteractionS in the Helmos Background TropOsphere (CALISHTO) campaign in fall 2021 (https://calishto.panacea-ri.gr/, last access: 1 August 2024) to examine the origins of the aerosols (i.e., local aerosol from the planetary boundary layer (PBL) or long-range-transported aerosol from the free-tropospheric layer (FTL) contributing to the cloud condensation nuclei (CCN)), their characteristics (hygroscopicity, size distribution, and mixing state), and the vertical velocity distributions and resulting supersaturations.We found that the characteristics of the PBL aerosol were considerably different from FTL aerosol and use the aerosol particle number and equivalent mass concentration of the black carbon (eBC) in order to determine when (HAC)2 was within the FTL or PBL based on time series of the height of the PBL. During the (HAC)2 cloud events we sample a mixture of interstitial aerosol and droplet residues, which we characterize using a new approach that utilizes the in situ droplet measurements to determine time periods when the aerosol sample is purely interstitial. From the dataset we determine the properties (size distribution and hygroscopicity) of the pre-cloud, activated, and interstitial aerosol. The hygroscopicity of activated aerosol is found to be higher than that of the interstitial or pre-cloud aerosol. A series of closure studies with the droplet parameterization shows that cloud droplet concentration (Nd) and supersaturation can be predicted to within 25 % of observations when the aerosol size distributions correspond to pre-cloud conditions. The analysis of the characteristic supersaturation of each aerosol population indicates that droplet formation in clouds is aerosol-limited when formed in FTL air masses - hence droplet formation is driven by aerosol variations, while clouds formed in the PBL tend to be velocity-limited and droplet variations are driven by fluctuations in vertical velocity. Given that the cloud dynamics do not vary significantly between air masses, the variation in aerosol concentration and type is mostly responsible for these shifts in cloud microphysical state and sensitivity to aerosol. With these insights, the remote sensing of cloud droplets in such clouds can be used to infer either CCN spectra (when in the FTL) or vertical velocity (when in the PBL). In conclusion, we show that a coordinated measurement of aerosol and cloud properties, together with the novel analysis approaches presented here, allows for the determination of the drivers of droplet formation in orographic clouds and their sensitivity to aerosol and vertical velocity variations. |
| WOS关键词 | LONG-RANGE TRANSPORT ; AEROSOL-SIZE DISTRIBUTIONS ; BOUNDARY-LAYER ; PARTICLE-SIZE ; CHEMICAL-COMPOSITION ; HYGROSCOPIC GROWTH ; FREE TROPOSPHERE ; DOPPLER LIDAR ; ACTIVATION ; CCN |
| 资助项目 | H2020 European Research Council (PyroTRACH)[726165] ; Swiss National Science Foundation (AAIDI)[192292] ; Hellenic Ministry of Rural Development and Food (PANACEA)[5021516] ; European Union (Clean-Cloud)[101137639] ; National Technical University of Athens[PEVE0011/2021] |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001304629000001 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| 资助机构 | H2020 European Research Council (PyroTRACH) ; Swiss National Science Foundation (AAIDI) ; Hellenic Ministry of Rural Development and Food (PANACEA) ; European Union (Clean-Cloud) ; National Technical University of Athens |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/134972]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Papayannis, Alexandros; Nenes, Athanasios |
| 作者单位 | 1.Univ Patras, Dept Chem Engn, Patras, Greece 2.North West Univ, Atmospher Chem Res Grp, Chem Resource Beneficiat, ZA-2520 Potchefstroom, South Africa 3.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 4.Natl Tech Univ Athens, Phys Dept, Laser Remote Sensing Unit LRSU, Zografos 15780, Greece 5.Fdn Res & Technol Hellas, Inst Chem Engn Sci, Ctr Studies Air Qual & Climate Change, Patras 26504, Greece 6.Ecole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, Lab Atmospher Proc & Their Impacts, CH-1015 Lausanne, Switzerland 7.Inst Nucl & Radiol Sci & Technol Energy & Safety, Environm Radioact & Aerosol Technol Atmospher & Cl, Natl Ctr Sci Res Demokritos, Athens 15310, Greece 8.Finnish Meteorol Inst, Kuopio 70211, Finland 9.Natl & Kapodistrian Univ Athens, Dept Phys, Sect Environm Phys & Meteorol, Climate & Climat Change Grp, Athens, Greece 10.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, England |
| 推荐引用方式 GB/T 7714 | Foskinis, Romanos,Motos, Ghislain,Gini, Maria I.,et al. Drivers of droplet formation in east Mediterranean orographic clouds[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2024,24. |
| APA | Foskinis, Romanos.,Motos, Ghislain.,Gini, Maria I..,Zografou, Olga.,Gao, Kunfeng.,...&Nenes, Athanasios.(2024).Drivers of droplet formation in east Mediterranean orographic clouds.ATMOSPHERIC CHEMISTRY AND PHYSICS,24. |
| MLA | Foskinis, Romanos,et al."Drivers of droplet formation in east Mediterranean orographic clouds".ATMOSPHERIC CHEMISTRY AND PHYSICS 24(2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
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