Cloud condensation nuclei closure during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign: Effects of size-resolved composition
Cloud condensation nuclei closure during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign: Effects of size-resolved composition
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DOI：
10.1029/2006jd007588
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发表时间：
2007-05
影响因子：
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通讯作者：
J. Medina;A. Nenes;R. Sotiropoulou;L. Cottrell;L. Ziemba;P. Beckman;R. Griffin
中科院分区：
文献类型：
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作者：
J. Medina;A. Nenes;R. Sotiropoulou;L. Cottrell;L. Ziemba;P. Beckman;R. Griffin
(1)在2004年ICARTT活动期间，在UNH-AirMap Thompson农场现场测量了云凝结核(CCN)、气溶胶大小分布和化学成分。这项工作的重点是分析一周的测量，在此期间，半城市和大陆的空气被采样。用“简单”的Kohler理论进行了CCN浓度的预测；随后将预测结果与过饱和度分别为0.2%、0.3%、0.37%、0.5%和0.6%的CCN测量结果进行了比较。使用大小平均的化学成分，CCN被大大高估了(35.8±28.5%)。引入大小相关的化学成分显著改善了闭合性(平均误差17.4±27.0%)。在风向变化期间，CCN的闭合较差，这表明有时可能需要在CCN预报中引入气溶胶混合状态。最后，对于描述CCN活性来说，可溶盐分数的知识是足够的。引文：Medina，J.，A.Nenes，R.-E.P.Sotiropoulou，L.D.Cottrell，L.D.Ziemba，P.J.Beckman，和R.J.Griffin(2007)，国际大气研究联盟2004年运动期间的云凝聚核关闭：大小分辨成分的影响，地球物理杂志。研究，112，D10S31，DOI：10.1029/2006JD007588。
(1) Measurements of cloud condensation nuclei (CCN), aerosol size distribution and chemical composition were obtained at the UNH-AIRMAP Thompson Farms site, during the ICARTT 2004 campaign. This work focuses on the analysis of a week of measurements, during which semiurban and continental air were sampled. Predictions of CCN concentrations were carried out using ''simple'' Kohler theory; the predictions are subsequently compared with CCN measurements at 0.2%, 0.3%, 0.37%, 0.5% and 0.6% supersaturation. Using size-averaged chemical composition, CCN are substantially overpredicted (by 35.8 ± 28.5%). Introducing size-dependent chemical composition substantially improved closure (average error 17.4 ± 27.0%). CCN closure is worse during periods of changing wind direction, suggesting that the introduction of aerosol mixing state into CCN predictions may sometimes be required. Finally, knowledge of the soluble salt fraction is sufficient for description of CCN activity. Citation: Medina, J., A. Nenes, R.-E. P. Sotiropoulou, L. D. Cottrell, L. D. Ziemba, P. J. Beckman, and R. J. Griffin (2007), Cloud condensation nuclei closure during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign: Effects of size-resolved composition, J. Geophys. Res., 112, D10S31, doi:10.1029/2006JD007588.