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metadata.dc.type: | Artigo de Periódico |
Title: | Measurements of sulfur dioxide, ozone and ammonia concentrations in Asia, Africa, and South America using passive samplers |
Other Titles: | Atmospheric Environment |
Authors: | Carmichael, Gregory R. Ferm, Martin Thongboonchoo, Narisara Jung-Hun, Woo Chan, L. Y. Murano, Kentaro Viet, Pham Hung Mossberg, Carl Bala, Rajasekhlar Boonjawat, Jariya Upatum, Pramote Mohan, Manju Adhikary, Sharad P. Shrestha, Arun B. Pienaar, J.J. |
metadata.dc.creator: | Carmichael, Gregory R. Ferm, Martin Thongboonchoo, Narisara Jung-Hun, Woo Chan, L. Y. Murano, Kentaro Viet, Pham Hung Mossberg, Carl Bala, Rajasekhlar Boonjawat, Jariya Upatum, Pramote Mohan, Manju Adhikary, Sharad P. Shrestha, Arun B. Pienaar, J.J. |
Abstract: | Measurements of gaseous SO2, NH3, and O3 using IVL passive sampler technology were obtained during a pilot measurement program initiated as a key component of the newly established WMO/GAW Urban Research Meteorology and Environment (GURME) project. Monthly measurements were obtained at 50 stations in Asia, Africa, South America, and Europe. The median SO2 concentrations vary from a high of 13 ppb at Linan, China, to <0.03 ppb at four stations. At 30 of 50 regional stations, the observed median concentrations are <1 ppb. Median ammonia concentrations range from 20 ppb at Dhangadi, India, to <1 ppb at nine stations. At 27 of regional stations, the ambient ammonia levels exceed 1 ppb. The median ozone concentrations vary from a maximum of 45 ppb at Waliguan Mountain, China, to 8 ppb in Petit Saut, French Guiana. In general, the highest ozone values are found in the mid-latitudes, with the Northern hemisphere mid-latitude values exceeding the Southern hemisphere mid-latitude levels, and the lowest values are typically found in the tropical regions. |
Keywords: | Diffusive samplers Sulfur dioxide Ammonia Ozone Asia África |
metadata.dc.rights: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/14338 |
Issue Date: | 2003 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
Files in This Item:
File | Description | Size | Format | |
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Gregory R Carmichael.pdf | 1,22 MB | Adobe PDF | View/Open |
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