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Long-term cloud con...
Long-term cloud condensation nuclei number concentration, particle number size distribution and chemical composition measurements at regionally representative observatories
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- Schmale, Julia (författare)
- Paul Scherrer Institute
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- Henning, Silvia (författare)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Decesari, Stefano (författare)
- CNR Institute of Atmospheric Sciences and Climate (CNR-ISAC)
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- Henzing, Bas (författare)
- Netherlands Organisation for Applied Scientific Research (Utrecht)
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- Keskinen, Helmi (författare)
- University of Helsinki
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- Sellegri, Karine (författare)
- University of Auvergne
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- Ovadnevaite, Jurgita (författare)
- National University of Ireland Galway
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- Pöhlker, Mira (författare)
- Max Planck Institute for Chemistry
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- Brito, Joel (författare)
- University of Auvergne,University of São Paulo
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- Bougiatioti, Aikaterini (författare)
- University of Crete
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- Kristensson, Adam (författare)
- Lund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Kalivitis, Nikos (författare)
- University of Crete
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- Stavroulas, Iasonas (författare)
- University of Crete
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- Carbone, Samara (författare)
- University of São Paulo
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- Jefferson, Anne (författare)
- National Oceanic and Atmospheric Administration (NOAA)
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- Park, Minsu (författare)
- Yonsei University
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- Schlag, Patrick (författare)
- Jülich Research Centre,Utrecht University
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- Iwamoto, Yoko (författare)
- Hiroshima University,Kanazawa University
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- Aalto, Pasi (författare)
- University of Helsinki
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- Äijälä, Mikko (författare)
- University of Helsinki
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- Bukowiecki, Nicolas (författare)
- Paul Scherrer Institute
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- Ehn, Mikael (författare)
- University of Helsinki
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- Fröhlich, Roman (författare)
- Paul Scherrer Institute
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- Frumau, Arnoud (författare)
- Energy Research Centre of the Netherlands
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- Herrmann, Erik (författare)
- Paul Scherrer Institute
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- Herrmann, Hartmut (författare)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Holzinger, Rupert (författare)
- Utrecht University
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- Kos, Gerard (författare)
- Energy Research Centre of the Netherlands
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- Kulmala, Markku (författare)
- University of Helsinki
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- Mihalopoulos, Nikolaos (författare)
- University of Crete,National Observatory of Athens
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- Nenes, Athanasios (författare)
- National Observatory of Athens,Georgia Institute of Technology,Foundation for Research and Technology - Hellas
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- O'Dowd, Colin (författare)
- National University of Ireland Galway
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- Petäjä, Tuukka (författare)
- University of Helsinki
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- Picard, David (författare)
- University of Auvergne
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- Pöhlker, Christopher (författare)
- Max Planck Institute for Chemistry
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- Pöschl, Ulrich (författare)
- Max Planck Institute for Chemistry
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- Poulain, Laurent (författare)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Swietlicki, Erik (författare)
- Lund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Andreae, Meinrat (författare)
- Max Planck Institute for Chemistry
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- Artaxo, Paulo (författare)
- University of São Paulo
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- Wiedensohler, Alfred (författare)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Ogren, John (författare)
- National Oceanic and Atmospheric Administration (NOAA)
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- Matsuki, Atsushi (författare)
- Kanazawa University
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- Soo Yum, Seong (författare)
- Yonsei University
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- Stratmann, Frank (författare)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Baltensperger, Urs (författare)
- Paul Scherrer Institute
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- Gysel, Martin (författare)
- Paul Scherrer Institute
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- Frank, Göran (författare)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Environmental and Climate Science (CEC),Faculty of Science,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- 2018-02-28
- 2018
- Engelska 29 s.
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Ingår i: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 18:4, s. 2853-2881
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://www.atmos-ch...
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https://lup.lub.lu.s...
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https://doi.org/10.5...
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Abstract
Ämnesord
Stäng
- Aerosol-cloud interactions (ACI) constitute the single largest uncertainty in anthropogenic radiative forcing. To reduce the uncertainties and gain more confidence in the simulation of ACI, models need to be evaluated against observations, in particular against measurements of cloud condensation nuclei (CCN). Here we present a data set - ready to be used for model validation - of long-term observations of CCN number concentrations, particle number size distributions and chemical composition from 12 sites on 3 continents. Studied environments include coastal background, rural background, alpine sites, remote forests and an urban surrounding. Expectedly, CCN characteristics are highly variable across site categories. However, they also vary within them, most strongly in the coastal background group, where CCN number concentrations can vary by up to a factor of 30 within one season. In terms of particle activation behaviour, most continental stations exhibit very similar activation ratios (relative to particles 20nm) across the range of 0.1 to 1.0% supersaturation. At the coastal sites the transition from particles being CCN inactive to becoming CCN active occurs over a wider range of the supersaturation spectrum. Several stations show strong seasonal cycles of CCN number concentrations and particle number size distributions, e.g. at Barrow (Arctic haze in spring), at the alpine stations (stronger influence of polluted boundary layer air masses in summer), the rain forest (wet and dry season) or Finokalia (wildfire influence in autumn). The rural background and urban sites exhibit relatively little variability throughout the year, while short-term variability can be high especially at the urban site. The average hygroscopicity parameter, calculated from the chemical composition of submicron particles was highest at the coastal site of Mace Head (0.6) and lowest at the rain forest station ATTO (0.2-0.3). We performed closure studies based on -Köhler theory to predict CCN number concentrations. The ratio of predicted to measured CCN concentrations is between 0.87 and 1.4 for five different types of . The temporal variability is also well captured, with Pearson correlation coefficients exceeding 0.87. Information on CCN number concentrations at many locations is important to better characterise ACI and their radiative forcing. But long-term comprehensive aerosol particle characterisations are labour intensive and costly. Hence, we recommend operating migrating-CCNCs to conduct collocated CCN number concentration and particle number size distribution measurements at individual locations throughout one year at least to derive a seasonally resolved hygroscopicity parameter. This way, CCN number concentrations can only be calculated based on continued particle number size distribution information and greater spatial coverage of long-term measurements can be achieved.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
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Schmale, Julia
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Henning, Silvia
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Decesari, Stefan ...
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Henzing, Bas
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Keskinen, Helmi
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Sellegri, Karine
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visa fler...
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Ovadnevaite, Jur ...
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Pöhlker, Mira
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Brito, Joel
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Bougiatioti, Aik ...
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Kristensson, Ada ...
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Kalivitis, Nikos
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Stavroulas, Iaso ...
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Carbone, Samara
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Jefferson, Anne
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Park, Minsu
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Schlag, Patrick
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Iwamoto, Yoko
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Aalto, Pasi
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Äijälä, Mikko
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Bukowiecki, Nico ...
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Ehn, Mikael
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Fröhlich, Roman
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Frumau, Arnoud
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Herrmann, Erik
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Herrmann, Hartmu ...
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Holzinger, Ruper ...
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Kos, Gerard
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Kulmala, Markku
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Mihalopoulos, Ni ...
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Nenes, Athanasio ...
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O'Dowd, Colin
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Petäjä, Tuukka
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Picard, David
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Pöhlker, Christo ...
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Pöschl, Ulrich
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Poulain, Laurent
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Swietlicki, Erik
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Andreae, Meinrat
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Artaxo, Paulo
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Wiedensohler, Al ...
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Ogren, John
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Matsuki, Atsushi
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Soo Yum, Seong
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Stratmann, Frank
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Baltensperger, U ...
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Gysel, Martin
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Frank, Göran
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