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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/gmd-2019-290
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2019-290
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: development and technical paper 26 Nov 2019

Submitted as: development and technical paper | 26 Nov 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

H2SO4-H2O binary and H2SO4-H2O-NH3 ternary homogeneous and ion-mediated nucleation: Lookup tables for 3-D modeling application

Fangqun Yu1, Alexey B. Nadykto1,2,3, Gan Luo1, and Jason Herb1 Fangqun Yu et al.
  • 1Atmospheric Sciences Research Center, University at Albany, Albany, New York, USA
  • 2Department of Applied Mathematics, Moscow State University of Technology “Stankin”, Russia
  • 3National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Department of General Physics, Russian Federation

Abstract. Formation of new particles in the atmosphere have important implications for air quality and climate. Recently, we have developed a kinetically-based H2SO4-H2O-NH3-Ions nucleation model which captures well the absolute values of nucleation rates as well as dependencies of nucleation rates on NH3 and H2SO4 concentrations, ionization rates, temperature, and relative humidity observed in the well-controlled Cosmics Leaving OUtdoor Droplets (CLOUD) measurements. Here we employ the aforementioned recently developed kinetic nucleation model to generate nucleation rate look-up tables for H2SO4-H2O binary homogenous nucleation (BHN), H2SO4-H2O-NH3 ternary homogeneous nucleation (THN), H2SO4-H2O-Ions binary ion-mediated nucleation (BIMN), and H2SO4-H2O-NH3-Ions ternary ion-mediated nucleation (TIMN). A comparison of nucleation rates calculated using the lookup tables with CLOUD measurements of BHN, BIMN, THN, and TIMN is presented. The lookup tables cover a wide range of key parameters controlling binary, ternary and ion-mediated nucleation in the Earth’s atmosphere, and are a cost-efficient solution for multi-dimensional modeling. The lookup tables and FORTRAN codes, made available through this work, can be readily used for BHN, THN, BIMN, and TIMN simulations in 3-D modeling. The lookup tables can also be used by experimentalists involved in laboratory and field measurements for a quick assessment of nucleation involving H2SO4, H2O, NH3, and Ions.

Fangqun Yu et al.
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Lookup tables for H2SO4-H2O binary and H2SO4-H2O-NH3 ternary homogeneous and ion-mediated nucleation F. Yu https://doi.org/10.5281/zenodo.3483797

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Short summary
Secondary particles formed via nucleation have important implications for air quality and climate. Here describe nucleation rate lookup tables for four different nucleation mechanisms that can be readily used in chemistry transport and climate models. The nucleation rates predicted have been assessed against the state-of-the-art laboratory measurements. The lookup tables cover a wide range of key parameters controlling binary, ternary and ion-mediated nucleation in the Earth’s atmosphere.
Secondary particles formed via nucleation have important implications for air quality and...
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