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- W4318833229 endingPage "2332" @default.
- W4318833229 startingPage "2322" @default.
- W4318833229 abstract "The Arctic region is experiencing notable warming as well as more lightning. Lightning is the dominant source of upper tropospheric nitrogen oxides (NOx), which are precursors for ozone and hydroxyl radicals. In this study, we combine the nitrogen dioxide (NO2) observations from the TROPOspheric Monitoring Instrument (TROPOMI) with Vaisala Global Lightning Dataset 360 to evaluate lightning NO2 (LNO2) production in the Arctic. By analyzing consecutive TROPOMI NO2 observations, we determine the lifetime and production efficiency of LNO2 during the summers of 2019-2021. Our results show that the LNO2 production efficiency over the ocean is ∼6 times higher than over continental regions. Additionally, we find that a higher LNO2 production efficiency is often correlated with lower lightning rates. The summertime lightning NOx emission in the Arctic (north of 70° N) is estimated to be 219 ± 116 Mg of N, which is equal to 5% of anthropogenic NOx emissions. However, for the span of a few hours, the Arctic LNO2 density can even be comparable to anthropogenic NO2 emissions in the region. These new findings suggest that LNO2 can play an important role in the upper-troposphere/lower-stratosphere atmospheric chemical processes in the Arctic, particularly during the summer." @default.
- W4318833229 created "2023-02-02" @default.
- W4318833229 creator A5003646058 @default.
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- W4318833229 creator A5080642569 @default.
- W4318833229 date "2023-02-01" @default.
- W4318833229 modified "2023-10-12" @default.
- W4318833229 title "Spaceborne Observations of Lightning NO<sub>2</sub> in the Arctic" @default.
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