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Gong, Xianda; Wex, Heike; Müller, Thomas; Wiedensohler, Alfred; Höhler, Kristina; Kandler, Konrad; Ma, Nan; Dietel, Barbara; Schiebel, Thea; Möhler, Ottmar; Stratmann, Frank (2019): Ground-based measurements on aerosol particles at Paphos, Cyprus, in March-April 2017. PANGAEA, https://doi.org/10.1594/PANGAEA.904758, Supplement to: Gong, X et al. (2019): Characterization of aerosol properties at Cyprus, focusing on cloud condensation nuclei and ice-nucleating particles. Atmospheric Chemistry and Physics, 19(16), 10883-10900, https://doi.org/10.5194/acp-19-10883-2019

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Abstract:
As part of the A-LIFE (Absorbing aerosol layers in a changing climate: aging, lifetime and dynamics) campaign, ground-based measurements were carried out in Paphos, Cyprus, for characterizing the abundance, properties and sources of aerosol particles in general, and cloud condensation nuclei (CCN) and ice nucleating particles (INP), in particular. New particle formation (NPF) events with subsequent growth of the particles into the CCN size range were observed. Aitken mode particles featured κ values of 0.21 to 0.29, indicating the presence of organic materials. Accumulation mode particles featured a higher hygroscopicity parameter, with a median κ value of 0.57, suggesting the presence of sulfate, and maybe sea salt particles mixed with organic carbon. A clear downward trend of κ with increasing supersaturation and decreasing dcrit was found. Super-micron particles originated mainly from sea spray aerosol (SSA) and partly from mineral dust. INP concentrations (NINP) were measured in the temperature range from −6.5 to −26.5 ℃, using two freezing array type instruments. NINP at a particular temperature span around 1 order of magnitude below −20 ℃, and about 2 orders of magnitude at warmer temperatures (T> −18 ℃). Few samples showed elevated concentrations at temperatures > −15 ℃, which suggests a significant contribution of biological particles to the INP population, which possibly could originate from Cyprus. Both measured temperature spectra and NINP probability density functions (PDFs) indicate that the observed INP (ice active in the temperature range between −15 and −20 ℃) mainly originate from long-range transport. There was no correlation between NINP and particle number concentration in the size range >500 nm (N>500nm). Parameterizations based on N>500nm were found to overestimate NINP by about 1 to 2 orders of magnitude. There was also no correlation between NINP and particle surface area concentration. The ice active surface site density (ns) for the polluted aerosol encountered in the eastern Mediterranean in this study is about 1 to 3 orders of magnitude lower than the ns found for dust aerosol particles in previous studies. This suggests that observed NINP-PDFs as those derived here could be a better choice for modelling NINP if the aerosol particle composition is unknown or uncertain.
Keyword(s):
cloud condensation nuclei; Cyprus; Ice Nucleating Particles
Funding:
Horizon 2020 (H2020), grant/award no. 640458: Absorbing aerosol layers in a changing climate: aging, lifetime and dynamics
Coverage:
Latitude: 34.716670 * Longitude: 32.483330
Date/Time Start: 2017-03-28T00:00:00 * Date/Time End: 2017-05-01T12:44:00
Event(s):
Paphos_ALife * Latitude: 34.716670 * Longitude: 32.483330 * Location: Cyprus
Comment:
Use of the raw data requires prior OK from lead PI (Please contact Heike Wex, wex@tropos.de).
Size:
16 datasets

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Datasets listed in this publication series

  1. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 01) Meteorological observations at Paphos, Cyprus, during March-April 2017. https://doi.org/10.1594/PANGAEA.904745
  2. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 02) Log-normal particle size distribution measurements at Paphos, Cyprus, during March-April 2017. https://doi.org/10.1594/PANGAEA.904746
  3. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 03) Back trajectory calculations at Paphos, Cyprus, during April 2017. https://doi.org/10.1594/PANGAEA.904747
  4. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 04) Particle number size distribution data at Paphos, Cyprus, during March-April 2017. https://doi.org/10.1594/PANGAEA.904748
  5. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 05) Cloud condensation nuclei time series at 0.08% supersaturation at Paphos, Cyprus, during April 2017. https://doi.org/10.1594/PANGAEA.904749
  6. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 05) Cloud condensation nuclei time series at 0.19% supersaturation at Paphos, Cyprus, during April 2017. https://doi.org/10.1594/PANGAEA.904750
  7. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 05) Cloud condensation nuclei time series at 0.31% supersaturation at Paphos, Cyprus, during April 2017. https://doi.org/10.1594/PANGAEA.904751
  8. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 05) Cloud condensation nuclei time series at 0.54% supersaturation at Paphos, Cyprus, during April 2017. https://doi.org/10.1594/PANGAEA.904752
  9. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 05) Cloud condensation nuclei time series at 0.77% supersaturation at Paphos, Cyprus, during April 2017. https://doi.org/10.1594/PANGAEA.904754
  10. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 05) Total cloud condensation nuclei time series at Paphos, Cyprus, during April 2017. https://doi.org/10.1594/PANGAEA.904755
  11. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 06) Average cloud condensation nuclei concentration at Paphos, Cyprus, during March-April 2017. https://doi.org/10.1594/PANGAEA.904756
  12. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 07) Ice nucleating particle spectra (INSEKT) at Paphos, Cyprus, during March-April 2017. https://doi.org/10.1594/PANGAEA.904785
  13. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 07) Ice nucleating particle spectra (LINA) at Paphos, Cyprus, during March-April 2017. https://doi.org/10.1594/PANGAEA.904787
  14. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 08) Dry deposition rates at Paphos, Cyprus, during March-April 2017. https://doi.org/10.1594/PANGAEA.904757
  15. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 09) Probability density functions. https://doi.org/10.1594/PANGAEA.904788
  16. Gong, X; Wex, H; Müller, T et al. (2019): (Supplement 10) Ice active surface site densities at Paphos, Cyprus. https://doi.org/10.1594/PANGAEA.904789