基于2006年6月至2016年12月期间CALIPSO星载激光雷达卫星观测资料, 分析了东中国海的渤海、黄海和东海海域的气溶胶时空分布特征。结果表明: (1) 三个海域的主要气溶胶构成都是清洁海洋型、沙尘型和污染大陆型三种类型气溶胶, 三者百分比之和均达到目标海域气溶胶成分的90%, 而具体占比最大、起主导作用的气溶胶类型在不同海域并不相同; (2) 三个海域随着高度升高气溶胶整体均为指数衰减趋势, 其中4 km高度以下各气溶胶类型变化显著, 4 km以上区域均只剩下沙尘型、污染沙尘型和煤烟型的气溶胶存在; (3) 几乎所有气溶胶类型都会随着月份和季节上的更替变化而变化, 春季各海域都是沙尘型气溶胶占比最大, 夏季清洁海洋型气溶胶影响最明显, 秋季和冬季期间东海地区以清洁海洋型气溶胶为主, 而渤海和黄海均是沙尘型气溶胶为主。

Based on the CALIPSO satellite observations from June 2006 to December 2016, the aerosol spatiotemporal distribution characteristics above the East China Seas (the Bohai Sea, the Yellow Sea and the East China Sea) were analyzed. The results indicate that: (1) Aerosols in the three seas are mainly Clean Marine, Dust and Polluted Dust, and the sum of the three percentages is nearly 90%. The predominant aerosol type is different in different seas; (2) Aerosols above each sea tend to exponentially decay as the height increases. The aerosol type changes significantly in the space below 4 km, but there exists only Dust, Polluted Dust and Smoke above 4 km; (3) Temporal distribution characteristics show that almost all aerosol types vary with months and seasons. In spring, the three seas are Dust aerosols accounted for the largest proportion. In summer, Clean Marine aerosols obviously have the greatest impact for the East China Sea. In autumn and winter, the Bohai Sea and the Yellow Sea are mainly composed of Dust aerosol, while the East China Sea is Clean Marine aerosol as main component.