The immersion mode ice nucleation behavior of mineral dusts: A comparison of different pure and surface modified dusts
The immersion mode ice nucleation behavior of mineral dusts: A comparison of different pure and surface modified dusts
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DOI：
10.1002/2014gl061317
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发表时间：
2014-10-28
影响因子：
5.2
通讯作者：
Stratmann, F.
中科院分区：
文献类型：
--
作者：
Augustin-Bauditz, S.;Wex, H.;Stratmann, F.
在这项研究中，我们提出的结果，从浸入式冷冻实验与尺寸隔离矿物粉尘颗粒。除了两个已经存在的数据集亚利桑那州测试粉尘（ATD），和Fluka高岭石，我们显示了两个新的数据集伊利石-NX，其中主要包括伊利石，粘土矿物，长石，一种常见的地壳材料。实验是用莱比锡气溶胶云相互作用模拟器进行的。通过对不同粉尘样品的比较，发现粉尘的冻结能力与钾长石含量呈正相关。此外，ATD，伊利石，NX和长石样品的组成的比较表明，在钾长石，微斜长石是更多的冰成核活性比正长石。硫酸涂层会导致所有矿物粉尘的冰成核能力下降，其中长石样品的效果更为明显。
In this study we present results from immersion freezing experiments with size-segregated mineral dust particles. Besides two already existing data sets for Arizona Test Dust (ATD), and Fluka kaolinite, we show two new data sets for illite-NX, which consists mainly of illite, a clay mineral, and feldspar, a common crustal material. The experiments were carried out with the Leipzig Aerosol Cloud Interaction Simulator. After comparing the different dust samples, it became obvious that the freezing ability was positively correlated with the K-feldspar content. Furthermore, a comparison of the composition of the ATD, illite-NX, and feldspar samples suggests that within the K-feldspars, microcline is more ice nucleation active than orthoclase. A coating with sulfuric acid leads to a decrease in the ice nucleation ability of all mineral dusts, with the effect being more pronounced for the feldspar sample.