African dust aerosols as atmospheric ice nuclei
African dust aerosols as atmospheric ice nuclei
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DOI：
10.1029/2003gl017410
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发表时间：
2003-07-17
影响因子：
5.2
通讯作者：
Kreidenweis, SM
中科院分区：
文献类型：
--
作者：
DeMott, PJ;Sassen, K;Kreidenweis, SM
[1]对佛罗里达上空来源为北非的气团中气溶胶粒子成冰能力的测量支持了尘埃气溶胶对间接影响云特性和气候的潜在重要性。小于1微米的尘埃层中的冰核浓度超过了1厘米(-3)；在比均匀冰冻条件下更温暖的温度下，我们的设备报告了有史以来最高的冰核浓度。这些测量增加了以前关于沙漠尘埃气溶胶成冰效率的直接和间接证据，但也证实了它们对远离源区的冰核种群的贡献。
[1] Measurements of the ice nucleating ability of aerosol particles in air masses over Florida having sources from North Africa support the potential importance of dust aerosols for indirectly affecting cloud properties and climate. The concentrations of ice nuclei within dust layers at particle sizes below 1 mum exceeded 1 cm(-3); the highest ever reported with our device at temperatures warmer than homogeneous freezing conditions. These measurements add to previous direct and indirect evidence of the ice nucleation efficiency of desert dust aerosols, but also confirm their contribution to ice nuclei populations at great distances from source regions.