Smart balloon observations over the North Atlantic: O3 data analysis and modeling ...
The temporal and spatial variations of ozone (O3) in polluted continental outflow over the North Atlantic were investigated during the International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) field campaign in July–August 2004. Our analysis utilized measurements of...
| Main Authors: | , , , , , |
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| Format: | Text |
| Language: | English |
| Published: |
AGU
2006
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.13016/m2dq4a-v5je https://mdsoar.org/handle/11603/35086 |
| Summary: | The temporal and spatial variations of ozone (O3) in polluted continental outflow over the North Atlantic were investigated during the International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) field campaign in July–August 2004. Our analysis utilized measurements of O3 from three smart balloons traveling at 0.5–3 km altitude in combination with simulations using the MM5/SMOKE/CMAQ air quality modeling system. Model results for over and within 300 km off North America were corroborated by comparison to a suite of measurements from ground stations, ozonesondes, and the NOAA ship Ronald H. Brown cruising in the Gulf of Maine. A prominent feature of the O3 distribution was the high mixing ratios over the North Atlantic, reaching a peak value of 171 ppbv, compared to the northeastern United States (100 ppbv). The enhanced O3 levels over ocean, mostly observed at night, appeared to be the result of four factors: (1) a supply of precursors in prevailing flow off the polluted U.S. ... |
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