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024 7 _ |2 DOI
|a 10.1126/science.1164566
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|a 1095-9203
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037 _ _ |a PreJuSER-62345
041 _ _ |a eng
082 _ _ |a 500
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|a Multidisciplinary Sciences
100 1 _ |a Hofzumahaus, A.
|b 0
|u FZJ
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245 _ _ |a Amplified trace gas removal in the troposphere
260 _ _ |c 2009
|a Washington, DC [u.a.]
|b American Association for the Advancement of Scienc
300 _ _ |a 1702 - 1704
336 7 _ |a Journal Article
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336 7 _ |a article
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440 _ 0 |a Science
|x 0036-8075
|0 5432
|v 324
500 _ _ |a We thank the PRiDe PRD 2006 campaign team (2002CB410801), especially L. J. Zhong, M. Hu, N. Takegawa, Y. Miyazaki, M. Koike, R. Haseler, and A. Oebel, for technical help and support at the field site, and J. L. Wang for help in the in situ measurement of VOCs. C.C. thanks Academic Sinica, Taiwan, for financial support of this work. Discussions with S. C. Liu and D. H. Ehhalt are gratefully acknowledged.
500 _ _ |a Record converted from VDB: 12.11.2012
520 _ _ |a The degradation of trace gases and pollutants in the troposphere is dominated by their reaction with hydroxyl radicals (OH). The importance of OH rests on its high reactivity, its ubiquitous photochemical production in the sunlit atmosphere, and most importantly on its regeneration in the oxidation chain of the trace gases. In the current understanding, the recycling of OH proceeds through HO2 reacting with NO, thereby forming ozone. A recent field campaign in the Pearl River Delta, China, quantified tropospheric OH and HO2 concentrations and turnover rates by direct measurements. We report that concentrations of OH were three to five times greater than expected, and we propose the existence of a pathway for the regeneration of OH independent of NO, which amplifies the degradation of pollutants without producing ozone.
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700 1 _ |a Rohrer, F.
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700 1 _ |a Lu, K.
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700 1 _ |a Bohn, B.
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700 1 _ |a Brauers, T.
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700 1 _ |a Chang, C.-C.
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700 1 _ |a Fuchs, H.
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700 1 _ |a Holland, F.
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700 1 _ |a Kita, K.
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700 1 _ |a Kondo, Y.
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700 1 _ |a Li, X.
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700 1 _ |a Lou, S.
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700 1 _ |a Shao, M.
|b 12
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700 1 _ |a Zeng, L.
|b 13
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700 1 _ |a Wahner, A.
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700 1 _ |a Zhang, Y.
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773 _ _ |0 PERI:(DE-600)2066996-3
|a 10.1126/science.1164566
|g Vol. 324, p. 1702 - 1704
|p 1702 - 1704
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|t Science
|v 324
|x 0036-8075
|y 2009
|n 5935
856 7 _ |u http://dx.doi.org/10.1126/science.1164566
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