Characteristics of trace metals in marine aerosols and their source identification over the Southern Ocean

作     者：ZHAO Shuhui CHEN Liqi LIN Hongmei 

作者机构：Key Lab of Global Change and Marine Atmospheric Chemistry SOA Third Institute of OceanographyState Oceanic Administration 

出 版 物：《Advances in Polar Science》 (极地科学进展（英文版）)

年 卷 期：2015年第26卷第3期

页      面：203-214页

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the National Natural Science Foundation of China (Grant nos. 41305133, 41230529, and 41476172) the Chinese Polar Environment Comprehensive Investigation& Assessment Programs (Grant no. CHINARE2012-15 for 01-04-02, 0201, and 03-04-02) Chinese International Cooperation Projects, Chinese Arctic and Antarctic Adminstration (Grant nos. 2015DFG22010, IC201201, IC201308, and IC201513) 

主　　题：aerosol trace element multivariate analysis Southern Ocean marine 

摘      要：Atmospheric trace metals （Cu, Zn, Cd, Pb, Fe, V, and Cr）, As, A1 and Na in marine aerosols were studied over the Southern Ocean during the 28th Chinese National Antarctic Research Expedition. Fe was the most abundant of the analyzed trace metals, with an average concentration of 28.824 ng.m3. V and Zn concentrations were also high, and their average concentrations were 5.541 ng.m^3 and 2.584 ng.m^-3, respectively. Although sea spray significantly influenced the marine aerosol particles measured （Na had the highest concentrations of the analyzed elements, with an average concentration of 2.65 μg.m^-3）, multivariate analyses （enrichment factor and principal components analysis） indicated that most of the elements were not associated with oceanic sources. Over the Southern Ocean, Fe, Cd, As, AI and Cr in the aerosols mainly originated from crustal sources, while Cu, Pb, V and Zn originated from crustal sources and anthropogenic emissions. The enrichment factors （EFcrust） for most elements （Fe, Al, As, Cr, Cd, Cu and V） were much lower in the northern latitudes, indicating that when the sampling occurred closer to land the concentrations of these elements in aerosols were strongly affected by terrestrial crustal sources.