CCN Activity, Variability and Influence on Droplet Formation during the HygrA-Cd Campaign in Athens

被引:10
作者
Bougiatioti, Aikaterini [1 ,2 ]
Argyrouli, Athina [2 ]
Solomos, Stavros [3 ]
Vratolis, Stergios [2 ,4 ]
Eleftheriadis, Konstantinos [4 ]
Papayannis, Alexandros [2 ]
Nenes, Athanasios [1 ,5 ,6 ,7 ]
机构
[1] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
[2] Natl Tech Univ Athens, Laser Remote Sensing Lab, Athens 15780, Greece
[3] Natl Observ Athens, IAASARS, Athens 15236, Greece
[4] Natl Ctr Sci Res Demokritos, Environm Radioact Lab, Inst Nucl & Radiol Sci & Technol Energy & Safety, Athens 15310, Greece
[5] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA
[6] Natl Observ Athens, Inst Environm Res & Sustainable Dev, Athens 15236, Greece
[7] Fdn Res & Technol Hellas, Inst Chem Engn Sci, Patras 26504, Greece
关键词
CCN activity; droplet formation; cloud maximum supersaturation; relative contribution of updraft velocity; MARINE BOUNDARY-LAYER; AEROSOL MIXING STATE; ACTIVATION PARAMETERIZATION; HYGROSCOPIC GROWTH; CLOUD-MICROPHYSICS; KINETICS; PRECIPITATION; PARTICLES; NUCLEUS; LIQUID;
D O I
10.3390/atmos8060108
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Measurements of cloud condensation nuclei (CCN) concentrations (cm(-3)) at five levels of supersaturation between 0.2-1%, together with remote sensing profiling and aerosol size distributions, were performed at an urban background site of Athens during the Hygroscopic Aerosols to Cloud Droplets (HygrA-CD) campaign. The site is affected by local emissions and long-range transport, as portrayed by the aerosol size, hygroscopicity and mixing state. Application of a state-of-the-art droplet parameterization is used to link the observed size distribution measurements, bulk composition, and modeled boundary layer dynamics with potential supersaturation, droplet number, and sensitivity of these parameters for clouds forming above the site. The sensitivity is then used to understand the source of potential droplet number variability. We find that the importance of aerosol particle concentration levels associated with the background increases as vertical velocities increase. The updraft velocity variability was found to contribute 58-90% (68.6% on average) to the variance of the cloud droplet number, followed by the variance in aerosol number (6-32%, average 23.2%). Therefore, although local sources may strongly modulate CCN concentrations, their impact on droplet number is limited by the atmospheric dynamics expressed by the updraft velocity regime.
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页数:13
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共 44 条
  • [1] Aerosol-cloud-precipitation interactions. Part 1. The nature and sources of cloud-active aerosols
    Andreae, M. O.
    Rosenfeld, D.
    [J]. EARTH-SCIENCE REVIEWS, 2008, 89 (1-2) : 13 - 41
  • [2] [Anonymous], 2012, P 26 INT LAS RAD C 2
  • [3] Argyrouli A., 2017, ATMOS CHEM PHYS PREP
  • [4] Investigation of molar volume and surfactant characteristics of water-soluble organic compounds in biomass burning aerosol
    Asa-Awuku, A.
    Sullivan, A. P.
    Hennigan, C. J.
    Weber, R. J.
    Nenes, A.
    [J]. ATMOSPHERIC CHEMISTRY AND PHYSICS, 2008, 8 (04) : 799 - 812
  • [5] Relating CCN activity, volatility, and droplet growth kinetics of β-caryophyllene secondary organic aerosol
    Asa-Awuku, A.
    Engelhart, G. J.
    Lee, B. H.
    Pandis, S. N.
    Nenes, A.
    [J]. ATMOSPHERIC CHEMISTRY AND PHYSICS, 2009, 9 (03) : 795 - 812
  • [6] Impact of WRF model PBL schemes on air quality simulations over Catalonia, Spain
    Banks, R. F.
    Baldasano, J. M.
    [J]. SCIENCE OF THE TOTAL ENVIRONMENT, 2016, 572 : 98 - 113
  • [7] Development of two-moment cloud microphysics for liquid and ice within the NASA Goddard Earth Observing System Model (GEOS-5)
    Barahona, D.
    Molod, A.
    Bacmeister, J.
    Nenes, A.
    Gettelman, A.
    Morrison, H.
    Phillips, V.
    Eichmann, A.
    [J]. GEOSCIENTIFIC MODEL DEVELOPMENT, 2014, 7 (04) : 1733 - 1766
  • [8] Comprehensively accounting for the effect of giant CCN in cloud activation parameterizations
    Barahona, D.
    West, R. E. L.
    Stier, P.
    Romakkaniemi, S.
    Kokkola, H.
    Nenes, A.
    [J]. ATMOSPHERIC CHEMISTRY AND PHYSICS, 2010, 10 (05) : 2467 - 2473
  • [9] Droplet activation parameterization: the population-splitting concept revisited
    Betancourt, R. Morales
    Nenes, A.
    [J]. GEOSCIENTIFIC MODEL DEVELOPMENT, 2014, 7 (05) : 2345 - 2357
  • [10] Organic, elemental and water-soluble organic carbon in size segregated aerosols, in the marine boundary layer of the Eastern Mediterranean
    Bougiatioti, A.
    Zarmpas, P.
    Koulouri, E.
    Antoniou, M.
    Theodosi, C.
    Kouvarakis, G.
    Saarikoski, S.
    Makela, T.
    Hillamo, R.
    Mihalopoulos, N.
    [J]. ATMOSPHERIC ENVIRONMENT, 2013, 64 : 251 - 262