Frost flowers as a source of fractionated sea salt aerosol in the polar regions
Frost flowers as a source of fractionated sea salt aerosol in the polar regions
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DOI：
10.1029/2000gl011771
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发表时间：
2000-11
影响因子：
5.2
通讯作者：
Andrew M. Rankin;V. Auld;Eric W. Wolff
中科院分区：
文献类型：
--
作者：
Andrew M. Rankin;V. Auld;Eric W. Wolff
从南极洲布伦特冰架附近的新海冰表面收集的霜花显示，相对于其他海水离子，硫酸盐和钠的消耗。这与霜花生长的盐水形成过程中芒硝（Na2SO4）的损失一致。从霜花产生的气溶胶将有较高的钠：硫酸盐比从海水产生的气溶胶。这可以解释在南极沿海地区冬季气溶胶中遇到的非海盐硫酸盐的低值，以及冰芯中的冬季层。计算证实，与沿海地区的开放水源相比，霜花水源应该是重要的。
Frost flowers collected from the surface of new sea ice near the Brunt Ice Shelf, Antarctica, show depletion in sulphate and sodium relative to other sea water ions. This is consistent with loss of mirabilite (Na2SO4) during formation of the brine from which the frost flowers grow. Aerosol generated from frost flowers would have higher sodium:sulphate ratios than aerosol generated from sea water. This would explain low values of non‐sea‐salt sulphate encountered in winter aerosol, and winter layers in ice cores, at coastal Antarctic sites. Calculations confirm that the frost flower source should be significant compared to an open water source for coastal regions.