PM₁₀ measurements at McMurdo Station, Antarctica

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• 作者：Mazzera ; David M. ; Lowenthal ; Douglas H. ; Chow ; Judith C. ; Watson ; John G. ; Grubisí ; c ; Vanda
• 关键词：PM₁₀ aerosol ; Air pollution ; Antarctica ; Methanesulfonate
• 刊名：Atmospheric Environment
• 出版年：2001
• 期刊代码：11_13522310
• 类别：env
• 出版时间：April, 2001
• 卷：35
• 期：10
• 页码：1891-1902
• 文件大小：337 K

摘要

PM₁₀ aerosols at McMurdo Station, Antarctica were sampled continuously during the austral summers of 1995–1996 and 1996–1997. PM₁₀ (particles with aerodynamic diameters less than 10μm) mass concentrations at Hut Point, located less than 1km from downtown McMurdo, averaged 3.4μgm⁻³, more than an order of magnitude lower than the USEPA annual average National Ambient Air Quality Standard (NAAQS) of 50μgm⁻³. Concentrations of methanesulfonate and nitrate were similar to those measured at other Antarctic coastal sites. Non-sea-salt sulfate (NSS) concentrations on Ross Island were higher than those found at other coastal locations. The average elemental carbon concentration (129ngm⁻³) downwind of the station was two orders of magnitude higher than those measured at remote coastal and inland Antarctic sites during summer. Average sulfur dioxide concentrations (746ngm⁻³) were 3–44 times higher than those reported for coastal Antarctica. Concentrations of Pb and Zn were 17 and 46 times higher than those reported for the South Pole. A methanesulfonate to biogenic sulfate ratio (R) of 0.47 was derived that is consistent with the proposed temperature dependence of R.