2014年春季黄渤海大气气溶胶、云凝结核及其活化效率的研究分析  

Study and Analysis of Atmospheric Aerosols and Cloud Condensation Nuclei and their Activation Efficiency over the Yellow Sea and Bohai Sea in Spring in 2014

作　　者：张德强 高阳 姚小红[1,2] 王俊涛 ZHANG De-Qiang;GAO Yang;YAO Xiao-Hong;WANG Jun-Tao(The Key Laboatory of Marine Enviromental Science and Technology,Ocean University of China, Qingdao 266100,China;Laboratory for Marine Ecology and Environmental Science,Polit National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China)

机构地区：[1]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100 [2]青岛海洋科学与技术(试点)国家实验室海洋生态与环境科学功能实验室,山东青岛266237

出　　处：《中国海洋大学学报（自然科学版）》2020年第11期30-37,共8页Periodical of Ocean University of China

基　　金：国家重点研究发展计划项目(2017YFC1404101);国家自然科学基金项目(41776086);中央高校基本科研业务费专项(201941006)资助。

摘　　要：2014年4~5月期间,搭乘“东方红二号”科考船(R/V)对黄海和渤海大气中凝结核数浓度(Concentrations of atmospheric particles,Ncn)、云凝结核数浓度(Concentrations of cloudcondensation nuclei,Nccn)、污染气体(SO2,O3)浓度以及大气颗粒物粒径分布进行了走航观测。观测结果显示,在整个航次期间,Ncn的变化范围为(2.7~57.6)×10^3 cm^-3,平均值为(12.6±7.0)×10^3 cm^-3。Ncn和Nccn在渤海最高,北黄海次之,南黄海最低,其中渤海的Ncn比北黄海和南黄海的Ncn分别高出41%和85%,在0.2%过饱和度(Supersaturation,SS)0.4%SS和1.0%SS下,渤海的Nccn比北黄海和南黄海的Nccn分别高出8%和17%、23%和30%以及38%和50%。南黄海在0.2%SS、0.4%SS和1.0%SS对应的活化效率(Activation ratio,AR)分别为0.25±0.08、0.52±0.14和0.56±0.14;北黄海和渤海在0.2%SS、0.4%SS和1.0%SS下对应的AR分别为0.24±0.10和0.17±0.07,0.47±0.15和0.38±0.16以及0.53±0.17和0.50±0.19。AR值在渤海最小,北黄海次之,南黄海最大,这可能是因为在不同海域气溶胶颗粒物粒径分布的差异,导致了气溶胶颗粒物活化为CCN效率的不同。此外,观测到一次新粒子生成(New particle formation,NPF)事件,当新粒子的中值粒径增长到40 nm左右时,Nccn在1.0%SS下升高127%,0.4%SS下升高36%,0.2%SS下没有变化。最后,探究了Ncn与SO2在近海大气中的关系,即:Ncn=1.7×10^3 SO2+3.4×10^3。A cruise campaign on the R/V Dong Fang Hong 2 was conducted over Yellow Sea and Bohai sea to measure the concentrations of atmospheric particles(Ncn)、the concentrations of cloud condensation nuclei(Nccn)、mixing ratios of gases(SO2,O3)and the size distribution of aerosol particles from April to May in 2014.Observation results showed that the range of Ncn was(2.7~57.6)×10^3 cm^-3,with an averaged Ncn of(12.6±7.0)×10^3 cm^-3.The Ncn and Nccn over the Bohai Sea were the largest,the secondover the North Yellow Sea,and the lowest over the South Yellow Sea,such as the Ncn of Bohai Sea was 41%and 85%larger than Ncn of North Yellow Sea and South Yellow Sea,the Nccn of Bohai Sea were 8%and 17%,23%and 30%,38%and 50%larger than Nccn of North Yellow Sea and South Yellow Sea at 0.2%SS,0.4%SS and 1.0%SS respectively.The activation ratios(AR)corresponding to 0.2%SS,0.4%SS and 1.0%SS over the South Yellow Sea were 0.25±0.08,0.52±0.14 and 0.56±0.14 respectively.Meanwhile,the AR were 0.24±0.10 and 0.17±0.07,0.47±0.15 and 0.38±0.16,0.53±0.17 and 0.50±0.19 at 0.2%SS,0.4%SS and 1.0%SS over the North Yellow Sea and Bohai Sea.The AR value over the South Yellow Sea was the largest,the AR overthe North Yellow Sea was second and the AR over the Bohai Sea was the lowest.This may be due to the difference in particle size distribution of aerosol particles in different seas,which leads to the difference in particle activation to CCN.In addition,a New Particle Formation(NPF)event was observed.It was found that when the median diameter of the new particles grew to about 40 nm,Nccn increased by 127%and 36%at 1.0%SS and 0.4%SS,respectively.Nccn did not increase at 0.2%SS.Finally,the relationship between Ncn and SO2 in the atmosphere of marginalseas was explored Ncn=1.7×10^3 SO2+3.4×10^3.

关 键 词：凝结核(CN) 云凝结核(CCN) 活化率(AR) 新粒子 SO2 

分 类 号：X142[环境科学与工程—环境科学]