Instrumentation and Measurement Strategy for the NOAA SENEX Aircraft Campaign as Part of the Southeast Atmosphere Study 2013 [post]

carsten warneke
2016 unpublished
40 Natural emissions of ozone-and-aerosol-precursor gases such as isoprene and 41 monoterpenes are high in the southeast of the US. In addition, anthropogenic emissions 42 are significant in the Southeast US and summertime photochemistry is rapid. The NOAA-43 led SENEX (Southeast Nexus) aircraft campaign was one of the major components of the 44 Southeast Atmosphere Study (SAS) and was focused on studying the interactions between 45 biogenic and anthropogenic emissions to form secondary
more » ... ts. During SENEX, the 46 NOAA WP-3D aircraft conducted 20 research flights between 27 May and 10 July 2013 47 based out of Smyrna, TN. 48 Here we describe the experimental approach, the science goals and early results of the 49 NOAA SENEX campaign. The aircraft, its capabilities and standard measurements are 50 described. The instrument payload is summarized including detection limits, accuracy, 51 precision and time resolutions for all gas-and-aerosol phase instruments. The inter-52 comparisons of compounds measured with multiple instruments on the NOAA WP-3D are 53 presented and were all within the stated uncertainties, except two of the three NO2 54 measurements. 55 The SENEX flights included day-and nighttime flights in the Southeast as well as flights 56 over areas with intense shale gas extraction (Marcellus, Fayetteville and Haynesville 57 shale). We present one example flight on 16 June 2013, which was a daytime flight over 58 the Atlanta region, where several crosswind transects of plumes from the city and nearby 59 point sources, such as power plants, paper mills and landfills, were flown. The area around 60 Atlanta has large biogenic isoprene emissions, which provided an excellent case for 61 studying the interactions between biogenic and anthropogenic emissions. In this example 62 flight, chemistry in and outside the Atlanta plumes was observed for several hours after 63 emission. The analysis of this flight showcases the strategies implemented to answer some 64 of the main SENEX science questions. 65 66 67 3
doi:10.5194/amt-2015-388-ac1 fatcat:tztiwlld4rc6lkocmlop4lzrtu