Technical note: Frenkel, Halsey and Hill analysis of water on clay minerals: toward closure between cloud condensation nuclei activity and water adsorption
Technical note: Frenkel, Halsey and Hill analysis of water on clay minerals: toward closure between cloud condensation nuclei activity and water adsorption
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DOI：
10.5194/acp-19-13581-2019
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发表时间：
2019-11
影响因子：
6.3
通讯作者：
C. Hatch;Paul R. Tumminello;M. Cassingham;Ann L. Greenaway;R. Meredith;M. J. Christie
中科院分区：
文献类型：
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作者：
C. Hatch;Paul R. Tumminello;M. Cassingham;Ann L. Greenaway;R. Meredith;M. J. Christie
抽象的。不溶性大气气溶胶，如矿物粉尘，已被认为是云滴数浓度和间接气候效应的重要贡献者。然而，在使用FHH活化理论(FHH-AT)评估不溶性气溶胶对气候的影响时，经验得出的Frenkel-Halsey-Hill(FHH)水吸附参数仍然是最大的不确定性来源。此外，以前报道的伊利石和蒙脱石的FHH水吸附参数由100%RH以下的吸水率测量确定，与FHH-AT分析实验云凝结核(CCN)过饱和条件下的值不令人满意地一致。这里报告的工作使用了之前报道的伊利石和蒙脱石粘土的水吸附实验测量(Hatch等人，2012,2014)，表明有必要改进考虑表面微结构的分析方法，以获得水吸附FHH参数与实验CCN得出的FHH参数之间的更好一致性。
Abstract. Insoluble atmospheric aerosol, such as mineral dust, has been identified as an important contributor to the cloud droplet number concentration and indirect climate effect. However, empirically derived Frenkel–Halsey–Hill (FHH) water adsorption parameters remain the largest source of uncertainty in assessing the effect of insoluble aerosol on climate using the FHH activation theory (FHH-AT). Furthermore, previously reported FHH water adsorption parameters for illite and montmorillonite determined from water adsorption measurements below 100 % RH do not satisfactorily agree with values determined from FHH-AT analysis of experimental cloud condensation nuclei (CCN) measurements under supersaturated conditions. The work reported here uses previously reported experimental water adsorption measurements for illite and montmorillonite clays (Hatch et al., 2012, 2014) to show that improved analysis methods that account for the surface microstructure are necessary to obtain better agreement of FHH parameters between water adsorption and experimental CCN-derived FHH parameters.