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Author |
Tackett, P.J.; Cavender, A.E.; Keil, A.D.; Shepson, P.B.; Bottenheim, J.W.; Morin, S.; Deary, J.; Steffen, A.; Doerge, C. |
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Title |
A study of the vertical scale of halogen chemistry in the Arctic troposphere during Polar Sunrise at Barrow, Alaska |
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Journal Article |
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Year  |
2007 |
Publication |
Journal of geophysical research-atmospheres |
Abbreviated Journal |
J. Geophys. Res. |
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Volume |
112 |
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Keywords |
Arctic; halogen chemistry; vertical profiles; 0365 Atmospheric Composition and Structure: Troposphere: composition and chemistry; 0736 Cryosphere: Snow; 0738 Cryosphere: Ice; 0312 Atmospheric Composition and Structure: Air/sea constituent fluxes; 0322 Atmospheric Composition and Structure: Constituent sources and sinks |
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Abstract |
The vertical extent and impact of halogen chemistry in the Arctic springtime was investigated through balloon-based measurement of several atmospheric chemical components. Various chemical species, including volatile organic compounds (VOCs), ozone, and elemental mercury, that are modified by halogen chemistry were measured from the surface to ?300 m during late March through mid-April 2005 in Barrow, Alaska. It is observed that the halogen chemistry appears to be most active in the lowest 100–200 m of the atmosphere. The Hg vertical concentration profiles are consistent with destruction by chemistry that evolves from a species emitted from the snowpack, most likely Br2 and BrCl, and the VOC profiles also demonstrate the limited vertical scale of halogen-initiated chemistry taking place above the Arctic snowpack. |
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Programme |
457 |
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Publisher |
American Geophysical Union |
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ISSN |
0148-0227 |
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Approved |
yes |
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Call Number |
IPEV @ Thierry.Lemaire @ |
Serial |
5635 |
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