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Insight into generation and evolution of sea-salt aerosols from field measurements in diversified marine and coastal atmospheres
Feng, L.; Shen, H.; Zhu, Y.; Gao, H.; Yao, X. (2017). Insight into generation and evolution of sea-salt aerosols from field measurements in diversified marine and coastal atmospheres. NPG Scientific Reports 7(41260): 12 pp. http://dx.doi.org/10.1038/srep41260
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
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| Auteurs | | Top |
- Feng, L.
- Shen, H.
- Zhu, Y.
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| Abstract |
This report focuses on studying generation and/or evolution of sea-salt aerosols (SSA) on basis of measurements in the Northwest Pacific Ocean (NWPO), the marginal seas of China, at sea-beach sites and a semi-urban coastal site in 2012-2015. From measurements in the NWPO, we obtained the smallest generation function of the super-micron SSA mass ([MSSA]) by the local wind comparing to those previously reported. Vessel-caused wave-breaking was found to greatly enhance generation of SSA and increase [MSSA], which was subject to non-natural generation of SSA. However, naturally enhanced generation of SSA was indeed observed in the marginal seas and at the sea-beach site. The two enhancement mechanisms may explain the difference among this and previous studies. Size distributions of super-micron SSA exhibited two modes, i.e., 1-2 mu m mode and similar to 5 mu m mode. The 1-2 mu m mode of SSA was enhanced more and comparable to the similar to 5 mu m mode under the wind speed > 7 m/s. However, the smaller mode SSA was largely reduced from open oceans to sea-beach sites with reducing wind speed. The two super-micron modes were comparable again at a semi-urban coastal site, suggesting that the smaller super-micron mode SSA may play more important roles in atmospheres. |
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