oceanic air and surface seawater

• Main Authors: Z. Xie, B. P. Koch, R. Sturm, R. Ebinghaus
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2011
• Subjects: Southern Ocean
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1034.1279; http://www.biogeosciences.net/8/2621/2011/bg-8-2621-2011.pdf

Abstract. Hexachlorocyclohexanes (HCHs) are ubiquitous organic pollutants derived from pesticide application. They are subject to long-range transport, persistent in the envi-ronment, and capable of accumulation in biota. Shipboard measurements of HCH isomers (α-, γ- and β-HCH) in sur-face seawater and boundary layer atmospheric samples were conducted in the Atlantic and the Southern Ocean in Oc-tober to December of 2008. 6HCHs concentrations (the sum of α-, γ- and β-HCH) in the lower atmosphere ranged from 12 to 37 pg m−3 (mean: 27 ± 11 pg m−3) in the North-ern Hemisphere (NH), and from 1.5 to 4.0 pg m−3 (mean: 2.8 ± 1.1 pg m−3) in the Southern Hemisphere (SH), respec-tively. Water concentrations were: α-HCH 0.33–47 pg l−1, γ-HCH 0.02–33 pg l−1 and β-HCH 0.11–9.5 pg l−1. Dis-solved HCH concentrations decreased from the North At-