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contributor authorLangford, A. O.
contributor authorSenff, C. J.
contributor authorAlvarez, R. J.
contributor authorBanta, R. M.
contributor authorHardesty, R. M.
contributor authorParrish, D. D.
contributor authorRyerson, T. B.
date accessioned2017-06-09T17:23:52Z
date available2017-06-09T17:23:52Z
date copyright2011/10/01
date issued2011
identifier issn0739-0572
identifier otherams-84507.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227851
description abstracthe NOAA airborne ozone lidar system [Tunable Optical Profiler for Aerosol and Ozone (TOPAZ)] is compared with the fast-response chemiluminescence sensor flown aboard the NOAA WP-3D during the 2006 Texas Air Quality Study (TexAQS). TOPAZ measurements made from the NOAA Twin Otter, flying at an altitude of ~3300 m MSL in the Houston, Texas, area on 31 August, and the Dallas, Texas, area on 13 September, show that the overall uncertainty in the 10-s (~600-m horizontal resolution) TOPAZ profiles is dominated by statistical uncertainties (1σ) of ~8 ppbv (6%?10%) at ranges of ~2300 m from the aircraft (~1000 m MSL), and ~11?27 ppbv (12%?30%) at ranges of ~2800 m (~500 m MSL). These uncertainties are substantially reduced by spatial averaging, and the averages of 11 profiles (of 110 s or 6.6-km horizontal resolution) at ~1000 m MSL are in excellent agreement (±2%) with the in situ measurements at ~500 m MSL. The TOPAZ measurements at lower altitudes on 31 August exhibit a negative bias of up to ~15%, however, when the lidar signals were strongly attenuated by very high ozone levels in the plume from the Houston Ship Channel. This bias appears to result from nonlinear behavior in the TOPAZ signal amplifiers, which is described in the companion paper by Alvarez et al. An empirical correction is presented.
publisherAmerican Meteorological Society
titleComparison between the TOPAZ Airborne Ozone Lidar and In Situ Measurements during TexAQS 2006
typeJournal Paper
journal volume28
journal issue10
journal titleJournal of Atmospheric and Oceanic Technology
identifier doi10.1175/JTECH-D-10-05043.1
journal fristpage1243
journal lastpage1257
treeJournal of Atmospheric and Oceanic Technology:;2011:;volume( 028 ):;issue: 010
contenttypeFulltext


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