Chemical Composition of Sea Fog Water Along the So

Authors: Yanyu Yue Shengjie Niu Lijuan Zhao Yu Zhang Feng Xu

Publish Date: 2012/05/22

Volume: 169, Issue: 12, Pages: 2231-2249

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Abstract

The chemical and microphysical properties of sea fog were measured during a field experiment on Donghai Island Zhanjiang of China from March 15 to April 18 2010 The average pH and electrical conductivity EC value of the six sea fog cases during the experiment was 52 and 1884 μS/cm The observed total ion concentration of sea fog was four orders of magnitude higher than those in the North Pacific and other sea areas of China The dominant anion and cation in all sea fog water samples were Cl− and Na+ respectively From backward trajectory analysis and ion loading computation it can be concluded that the ions in the samples were transported either from pollutants in distant industrial cities or from local ion deposition processes The concentration of Ca2+ in the sea fog water samples in Case 2 suggested that a dust storm in the Inner Mongolia a northern region of China several thousand kilometers away could reach the South China Sea The data also showed that the sea fog droplet spectrum over the South China Sea is unimodal Through relationship analysis it is illustrated that the evolution of microphysics such as droplet concentration diameter and liquid water content during fog process could affect the chemical properties of sea fogFunding for this work was provided by the Meteorology Fund of the Ministry of Science and Technology Grant No GYHYQX2007626 by the National Natural Science Foundation of China Grant No 40775012 by A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions by the Qinglan Project for cloudfogprecipitationaerosol study in Jiangsu province and by the Graduate Student Innovation Plan in the Universities of Jiangsu Province

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