Recent decline of methyl bromide in the troposphere

• Published in: Atmospheric environment (1994) Vol. 36; no. 32; pp. 4985 - 4989
• Main Authors: Yokouchi, Y, Toom-Sauntry, D, Yazawa, K, Inagaki, T, Tamaru, T
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-10-2002; Elsevier Science
• Subjects: Applied sciences; Atmospheric pollution; Chemical composition and interactions. Ionic interactions and processes; Earth, ocean, space; Exact sciences and technology; External geophysics; Meteorology; methyl bromide; Montreal Protocol; Pollutants physicochemistry study: properties, effects, reactions, transport and distribution; Pollution; Arctic Region; Northern Hemisphere; Arctic; Surveillance; Pollution prevention; Content; Troposphere; Bromocarbon; Air pollution; Air quality; Bromine Organic compounds; Methyl bromide
• ISSN: 1352-2310; 1873-2844
• DOI: 10.1016/S1352-2310(02)00650-7

Atmospheric methyl bromide (CH
3Br) measured at a remote ground station in the Arctic (mid-1996 to early 2002) and in the free troposphere at mid-latitude (early 1999 to early 2002) showed a steady annual average decrease of 4–6%. The trend was consistent with a simulation of the response to the phase-out schedule of anthropogenic emissions under the Montreal Protocol and its amendments, suggesting that a decrease in CH
3Br abundance in the Northern Hemisphere of as much as 40% from the level of the early 1990s would be possible by the completion date of the program.