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DOI | 10.5194/acp-17-1713-2017 |
Classical nucleation theory of immersion freezing: sensitivity of contact angle schemes to thermodynamic and kinetic parameters | |
Ickes, Luisa1,2; Welti, Andre1,3; Lohmann, Ulrike1 | |
2017-02-03 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Sweden; Germany |
英文摘要 | Heterogeneous ice formation by immersion freezing in mixed-phase clouds can be parameterized in general circulation models (GCMs) by classical nucleation theory (CNT). CNT parameterization schemes describe immersion freezing as a stochastic process, including the properties of insoluble aerosol particles in the droplets. There are different ways to parameterize the properties of aerosol particles (i.e., contact angle schemes), which are compiled and tested in this paper. The goal of this study is to find a parameterization scheme for GCMs to describe immersion freezing with the ability to shift and adjust the slope of the freezing curve compared to homogeneous freezing to match experimental data. We showed in a previous publication that the resulting freezing curves from CNT are very sensitive to unconstrained kinetic and thermodynamic parameters in the case of homogeneous freezing. Here we investigate how sensitive the outcome of a parameter estimation for contact angle schemes from experimental data is to unconstrained kinetic and thermodynamic parameters. We demonstrate that the parameters describing the contact angle schemes can mask the uncertainty in thermodynamic and kinetic parameters. Different CNT formulations are fitted to an extensive immersion freezing dataset consisting of size-selected measurements as a function of temperature and time for different mineral dust types, namely kaolinite, illite, montmorillonite, microcline (K-feldspar), and Arizona test dust. We investigated how accurate different CNT formulations (with estimated fit parameters for different contact angle schemes) reproduce the measured freezing data, especially the time and particle size dependence of the freezing process. The results are compared to a simplified deterministic freezing scheme. In this context, we evaluated which CNT-based parameterization scheme able to represent particle properties is the best choice to describe immersion freezing in a GCM. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395097100004 |
WOS关键词 | HETEROGENEOUS ICE NUCLEATION ; DELIQUESCENT MIXED CCN ; MINERAL DUST ; KAOLINITE PARTICLES ; ACTIVATION-ENERGY ; WATER DROPLETS ; PHASE CLOUDS ; DESERT DUST ; MODEL ; CLIMATE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30654 |
专题 | 地球科学 |
作者单位 | 1.Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, Zurich, Switzerland; 2.Stockholm Univ, Dept Meteorol, Stockholm, Sweden; 3.Leibniz Inst Tropospher Res, Leipzig, Germany |
推荐引用方式 GB/T 7714 | Ickes, Luisa,Welti, Andre,Lohmann, Ulrike. Classical nucleation theory of immersion freezing: sensitivity of contact angle schemes to thermodynamic and kinetic parameters[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(3). |
APA | Ickes, Luisa,Welti, Andre,&Lohmann, Ulrike.(2017).Classical nucleation theory of immersion freezing: sensitivity of contact angle schemes to thermodynamic and kinetic parameters.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(3). |
MLA | Ickes, Luisa,et al."Classical nucleation theory of immersion freezing: sensitivity of contact angle schemes to thermodynamic and kinetic parameters".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.3(2017). |
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