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Overview of the Po valley fog experiment 1994 (CHEMDROP)

Fuzzi, Sandro; Laj, Paolo; Ricci, Loretta; Orsi, Giordano; Heintzenberg, Jost; Wendisch, Manfred; Yuskiewicz, Brett; Mertes, Stephan; Orsini, Douglas and Schwanz, Marina, et al. (1998) In Contributions to Atmospheric Physics 71(1). p.3-19
Abstract

The paper presents an outline of the CHEMDROP field experiment, carried out in November 1994 at the field station of S. Pietro Capofiume in the Po Valley, Italy. The main objective of the project was to address the issue of the size-dependent chemical composition of fog droplets, by experimentally investigating the following processes, which are expected to affect (or be affected by) the chemical composition of fog droplets as a function of size: a) the connection of the size-dependent chemical composition of CCN to the size-dependent composition of fog droplets; b) the gas/liquid partitioning of the gaseous species NH3, SO2, HCHO, HNO3 in fog; c) the Fe(II)/Fe(III) redox cycle in fog water. Some general... (More)

The paper presents an outline of the CHEMDROP field experiment, carried out in November 1994 at the field station of S. Pietro Capofiume in the Po Valley, Italy. The main objective of the project was to address the issue of the size-dependent chemical composition of fog droplets, by experimentally investigating the following processes, which are expected to affect (or be affected by) the chemical composition of fog droplets as a function of size: a) the connection of the size-dependent chemical composition of CCN to the size-dependent composition of fog droplets; b) the gas/liquid partitioning of the gaseous species NH3, SO2, HCHO, HNO3 in fog; c) the Fe(II)/Fe(III) redox cycle in fog water. Some general results and overall conclusions of the experiment are reported in this paper, while more specific scientific questions are discussed in other companion papers in this issue. CHEMDROP results show that several processes concur in determining the size-dependence of fog droplets chemical composition: nucleation scavenging of pre-existing CCN, fog dynamical evolution and gas/liquid exchange between interstitial air and fog droplets. Chemical transformations in the liquid phase can cause further changes in the chemical composition of the droplets. Only by taking into account the combination of all these processes, is it possible to explain the inhomogeneities in fog droplet chemical composition.

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Contributions to Atmospheric Physics
volume
71
issue
1
pages
17 pages
publisher
Deutsche Meteorologische Gesellschaft / Friedr. Vieweg & Sohn Verlagsgesellschaft mbh
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  • scopus:0031746987
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0005-8173
language
English
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yes
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b1bfe057-68bc-4b1b-bb34-006c83cf7d84
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2019-05-16 09:12:37
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2019-08-18 04:58:24
@article{b1bfe057-68bc-4b1b-bb34-006c83cf7d84,
  abstract     = {<p>The paper presents an outline of the CHEMDROP field experiment, carried out in November 1994 at the field station of S. Pietro Capofiume in the Po Valley, Italy. The main objective of the project was to address the issue of the size-dependent chemical composition of fog droplets, by experimentally investigating the following processes, which are expected to affect (or be affected by) the chemical composition of fog droplets as a function of size: a) the connection of the size-dependent chemical composition of CCN to the size-dependent composition of fog droplets; b) the gas/liquid partitioning of the gaseous species NH<sub>3</sub>, SO<sub>2</sub>, HCHO, HNO<sub>3</sub> in fog; c) the Fe(II)/Fe(III) redox cycle in fog water. Some general results and overall conclusions of the experiment are reported in this paper, while more specific scientific questions are discussed in other companion papers in this issue. CHEMDROP results show that several processes concur in determining the size-dependence of fog droplets chemical composition: nucleation scavenging of pre-existing CCN, fog dynamical evolution and gas/liquid exchange between interstitial air and fog droplets. Chemical transformations in the liquid phase can cause further changes in the chemical composition of the droplets. Only by taking into account the combination of all these processes, is it possible to explain the inhomogeneities in fog droplet chemical composition.</p>},
  author       = {Fuzzi, Sandro and Laj, Paolo and Ricci, Loretta and Orsi, Giordano and Heintzenberg, Jost and Wendisch, Manfred and Yuskiewicz, Brett and Mertes, Stephan and Orsini, Douglas and Schwanz, Marina and Wiedensohler, Alfred and Stratmann, Frank and Berg, Olle H. and Swietlicki, Erik and Frank, Göran and Martinsson, Bengt G. and Günther, Armin and Dierssen, Jens Peter and Schell, Dieter and Jaeschke, Wolfgang and Berner, Axel and Dusek, Ulrike and Galambos, Zsuzsanna and Kruisz, Christian and Mesfin, Nigatu S. and Wobrock, Wolfram and Arends, Beate and Brink, H. Ten},
  issn         = {0005-8173},
  language     = {eng},
  month        = {02},
  number       = {1},
  pages        = {3--19},
  publisher    = {Deutsche Meteorologische Gesellschaft / Friedr. Vieweg & Sohn Verlagsgesellschaft mbh},
  series       = {Contributions to Atmospheric Physics},
  title        = {Overview of the Po valley fog experiment 1994 (CHEMDROP)},
  volume       = {71},
  year         = {1998},
}