An assessment of direct NO2 emissions from Oklaunion power generation facility during TexAQS 2006
Abstract
Airborne measurements of NO, NO2, O3, and NOy were taken from the NOAA WP-3D during TexAQS 2006. We use two independent NO2 measurements (photolysis-chemiluminescence (CL) and cavity rindgown absorption spectroscopy (CaRDS)) aboard the aircraft to quantify the fraction of NO2 directly emitted from the Oklaunion power generation facility, providing the first quantitative estimate of NO2 emissions from a power generation facility using ambient data. On the night of October 10, 2006, several transects were flown downwind of Oklaunion, a coal-burning electric generation unit with one stack. These transects range from 18 to 73 km downwind of Oklaunion, with transportation times ranging from 36 (± 5) minutes to 2.5 (± 0.3) hours. Excess odd oxygen at the stack (NO2/NOx) is measured downwind as the excess of odd oxygen (NO2 + O3) over NOx (NO2 + NO) against a background of odd oxygen (O3 only, because NOx ~ 0 outside the plume). Excess odd oxygen from Oklaunion calculated using the CL NO2 instrument and the CaRDS NO2 instrument are in quantitative agreement, and will be presented.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2009
- Bibcode:
- 2009AGUFM.A31B0100P
- Keywords:
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- 0345 ATMOSPHERIC COMPOSITION AND STRUCTURE / Pollution: urban and regional;
- 0365 ATMOSPHERIC COMPOSITION AND STRUCTURE / Troposphere: composition and chemistry