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024 7 _ |a 10.1029/2006JD007347
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024 7 _ |a WOS:000246838900001
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024 7 _ |a 0141-8637
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024 7 _ |a 2128/20437
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037 _ _ |a PreJuSER-52238
041 _ _ |a eng
082 _ _ |a 550
084 _ _ |2 WoS
|a Meteorology & Atmospheric Sciences
100 1 _ |a Chatfield, R.
|b 0
|0 P:(DE-HGF)0
245 _ _ |a Mechanisms for the Intraseasonal Variability of Tropospheric Ozone over the Indian Ocean during the Winter Monsoon
260 _ _ |c 2007
|a Washington, DC
|b Union
300 _ _ |a D10303
336 7 _ |a Journal Article
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336 7 _ |a article
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440 _ 0 |a Journal of Geophysical Research D: Atmospheres
|x 0148-0227
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500 _ _ |a Record converted from VDB: 12.11.2012
520 _ _ |a [1] We synthesize daily sonde (vertical) information and daily satellite ( horizontal) information to provide an empirical description of ozone origins over the northern Indian Ocean during the INDOEX ( Indian Ocean Experiment) field campaign ( February - March 1999). This area is shown to be a significant portion of the "high-ozone tropics''. East-west O-3 features and their flow are identified, and ozone origins are compared to other tropical regions, using water vapor as a second tracer. In the study period, multiple processes contribute to O-3 column enhancements, their importance varying strongly by latitude: ( 1) Low-altitude O-3 pollution over the northern Indian Ocean mainly originates from the Indian subcontinent and is traceable to high emission areas. Convective activity south of Sri Lanka helps direct ozone outflow from the northern Indian subcontinent. ( 2) Middle tropospheric O-3 maxima over the northern Indian Ocean originate from various sources, often transitioning within a few hours. Convective venting of Asian pollutants can add 20 - 30 ppbv to the middle troposphere at 5 degrees N - 10 degrees N, alternating with stratospheric influence. ( 3) A number of cases suggest that strong mixing-in of stratospheric air along the subtropical jet raised tropospheric O-3 in early March by similar to 40 - 50 ppbv, especially poleward of similar to 10 degrees N. ( 4) Influences of lightning and large-scale biomass burning were not strong during this period, in contrast to the situation in Africa and the South Atlantic or locally in Southeast Asia. This work illustrates successes and limitations in approaches to synthesizing disparate information on trace-gas distributions taken from satellite retrieval products and ozonesondes.
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700 1 _ |a Guan, H.
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700 1 _ |a Thompson, A.
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700 1 _ |a Smit, H. G. J.
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773 _ _ |0 PERI:(DE-600)2016800-7
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|q 112|t Journal of Geophysical Research
|v 112
|x 0148-0227
|y 2007
|t Journal of geophysical research / Atmospheres
856 7 _ |u http://dx.doi.org/10.1029/2006JD007347
856 4 _ |u https://juser.fz-juelich.de/record/52238/files/2006JD007347.pdf
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