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- W2094570095 abstract "As part of the July 1976 Midwest Interstate Sulfur Transformation and Transport experiment (MISTT) in St. Louis, Missouri U.S.A., the long-range transport of SO2 and other pollutants emitted from the 216 m stack of a 2000 Mw coal-fired power plant have been documented during both day and night summer conditions. Aircraft measurements and trajectory analyses showed that SO2 emitted during the late morning hours of 18 July, 1976, underwent rapid mixing near the plant. Once mixed through the mixing layer, however, the plume maintained its identity. In the evening, a surface radiation inversion formed, thermally driven mixing ceased and the lapse rate aloft became more stable. Although winds less than 4ms−1 existed at the surface, from 300 to 800 m msl, the winds were 8–15 m s−1 for most of the night. SO2 emitted during the day became decoupled from the ground and was shown to be transported more than 300 km by midnight in the high wind speed region aloft. The SO2 emitted at night remained decoupled from the ground and experienced much less dilution. At 75 km in the night-emitted plume, the peak SO2 concentration was greater than 0.8S ppm. The high wind speeds seen aloft in stable air on the night of 18 July are a common occurrence in the U.S. and presumably in other parts of the world during the summer months. In July 1976, conditions were favorable for the long-range transport of SO2 in layers aloft on at least 18 out of 31 nights. The stable night regime is important for the long-range transport of sulfur compounds in the air. Without the ground as a sink, or solar heating to drive mixing, the SO2 can be transported hundreds of kilometers. Accumulation and transport of SO2 and its reaction products is a synoptic scale, multiday problem." @default.
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- W2094570095 date "1978-01-01" @default.
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- W2094570095 title "Transport of so2 in power plant plumes: Day and night" @default.
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- W2094570095 doi "https://doi.org/10.1016/0004-6981(78)90240-8" @default.
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