【摘要】 针对海洋大气气溶胶沉降中磷(Phosphorus, P)可溶部分对表层海水中浮游植物生长的重要支持作用，为明确黄、渤海海域气溶胶中P浓度及溶解度的时空分布特征，本研究利用2013—2018年间在黄、渤海五个航次中采集的53个大气总悬浮颗粒物(Total suspended particle, TSP)样品，分析了其中总P(Totle phosphorus, TP)和溶解态P(Dissolved phosphorus, DP)浓度。结果显示，黄、渤海大气气溶胶中TP浓度在1.5～135.2 ng/m~3,DP浓度在1.3～39.9 ng/m~3,P溶解度在12.5%～88.9%。P浓度及溶解度呈显著的时空分布特征：TP浓度呈现春季>秋季>夏季，DP浓度呈现春、秋季基本相当且均显著高于夏季，P溶解度呈现夏季>秋季>春季；空间上，渤海大气中TP和DP浓度高于黄海，但P溶解度低于黄海(气团来源和大气酸化是造成这种时空分布的重要因素);在气团来自受沙尘影响的北方陆源(Northern continental sources affected by sand dust, NCS-DS)的气溶胶样品中，TP浓度最高；在受北方陆源(包括NCS-DS和不受沙尘影响的北方陆源(Northern continental sources unaffected by sand dust, NCS-NDS))影响的气溶胶样品中，DP浓度高于受海洋源(Marine sources, MS)和南方陆源(Southern continental sources, SCS)影响的样品，P溶解度呈现MS>SCS>NCS-NDS>NCS-DS;大气酸化效应可使气溶胶中P溶解度提升10%～27%。更多还原

【Abstract】 Aiming to clarify the critical supporting role of soluble phosphorus(P) in marine atmospheric aerosol deposition on the growth of phytoplankton in surface seawater, this study focuses on elucidating the spatiotemporal distribution characteristics of aerosol P concentration and solubility in the Yellow Sea and Bohai Sea, in this study, 53 atmospheric total suspended particulate(TSP) samples collected during five shared cruises in the Yellow Sea and the Bohai Sea during 2013-2018 were used to analyze the concentrations of total P(TP) and dissolved P(DP), and to investigate the characteristics of the spatial and temporal distributions of the P concentration and solubility in the aerosol, as well as the effects of the source of the air mass and the atmospheric acidification process. The results show that the atmospheric aerosol concentrations of TP in the Yellow Sea and the Bohai Sea range from 1.5 to 135.2 ng/m~3, the concentrations of DP range from 1.3 to 39.9 ng/m~3, and the solubility of P ranges from 12.5% to 88.9%. P concentration and solubility showed significant spatial and temporal distributions.TP concentration showed the characteristics of spring>autumn>summer, DP showed the characteristics of spring and autumn were basically equivalent and both significantly higher than summer, while P solubility was summer>autumn>spring. The spatial distribution shows that the atmospheric TP and DP concentrations in the Bohai Sea are higher than those in the Yellow Sea, but the P solubility is lower than that in the Yellow Sea. The source of air masses and atmospheric acidification are important factors for this spatial and temporal distribution. The TP concentration is the highest in aerosols from northern continental sources and under the influence of sand and dust(NCS-DS), while the DP concentration is higher in aerosols under the influence of northern continental sources(both sand and dust and non-sand NCS-NDS) than that under the influence of marine sources(MS) and southern continental sources(SCS), and the P solubility is MS>SCS>NCS-NDS>NCS-DS. Atmospheric acidification effects can increase P solubility in aerosols by 10%～27%.更多还原