51 Lightning NO X Distribution and Its Impact on Ozone …
327
Fig. 51.4 Mean vertical O 3 profiles from ozone-sonde observations and model simulations at
Beltsville and Edgewood, MD on days when significant lightning impact was observed near each
location
warmer months is present, thus it is important to count LNO X emissions in regional
air quality model simulations to improve the accuracy of air quality predictions.
Question and Answer
Questioner: Jack Chen
Question: Does the NLDN observations of lightning flash data have different flash
type by in-cloud, cloud-ground? If so, are they handled differently in the model?
Answer: No. the NLDN observations only contain cloud-to-ground flashes. We used
the satellite-based climatological intracloud to cloud-to-ground flash ratios to estimate gridded hourly total LNO x .
Acknowledgements We sincerely thank Vaisala for making the NLDN data available to us.
Disclaimer The views expressed in this paper are those of the authors and do not necessarily
represent the views or policies of the U.S. EPA. Mention of trade names or commercial products
does not constitute endorsement or recommendation for use.
327
Fig. 51.4 Mean vertical O 3 profiles from ozone-sonde observations and model simulations at
Beltsville and Edgewood, MD on days when significant lightning impact was observed near each
location
warmer months is present, thus it is important to count LNO X emissions in regional
air quality model simulations to improve the accuracy of air quality predictions.
Question and Answer
Questioner: Jack Chen
Question: Does the NLDN observations of lightning flash data have different flash
type by in-cloud, cloud-ground? If so, are they handled differently in the model?
Answer: No. the NLDN observations only contain cloud-to-ground flashes. We used
the satellite-based climatological intracloud to cloud-to-ground flash ratios to estimate gridded hourly total LNO x .
Acknowledgements We sincerely thank Vaisala for making the NLDN data available to us.
Disclaimer The views expressed in this paper are those of the authors and do not necessarily
represent the views or policies of the U.S. EPA. Mention of trade names or commercial products
does not constitute endorsement or recommendation for use.