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No2 Profile Retrieval Using Airborne Multi Axis Uv-visible Skylight Absorption Measurements Over Central Europe : Volume 6, Issue 10 (24/07/2006)

By Bruns, M.

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Book Id: WPLBN0003994513
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: No2 Profile Retrieval Using Airborne Multi Axis Uv-visible Skylight Absorption Measurements Over Central Europe : Volume 6, Issue 10 (24/07/2006)  
Author: Bruns, M.
Volume: Vol. 6, Issue 10
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2006
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Buehler, S. A., Burrows, J. P., Wang, P., Rozanov, A., Pundt, I., Wagner, T.,...Platt, U. (2006). No2 Profile Retrieval Using Airborne Multi Axis Uv-visible Skylight Absorption Measurements Over Central Europe : Volume 6, Issue 10 (24/07/2006). Retrieved from http://community.ebooklibrary.org/


Description
Description: Institute of Environmental Physics, University of Bremen, P.O. Box 33 04 40, 28 359 Bremen, Germany. A recent development in ground-based remote sensing of atmospheric constituents by UV/visible absorption measurements of scattered light is the simultaneous use of several directions with small elevation angles in addition to the traditional zenith-sky pointing. The different light paths through the atmosphere enable the vertical distribution of some atmospheric absorbers such as NO2, BrO or O3 to be retrieved.

In this study, the amount of profile information that can be retrieved from such measurements on aircraft is investigated for the trace gas NO2. A Sensitivity study on synthetic data is performed for a combination of four lines of sight (LOS) (0°(nadir), 88°, 92°, and 180° (zenith)) and three wavelength regions [center wavelengths: 362.5 nm, 437.5 nm, and 485.0 nm]. The method used in this work is a combination of two previously established methods described in Petritoli et al. (2002) and Wang et al. (2004). The investigation presented here demonstrates the potential of this LOS/wavelengths setup to retrieve a significant amount of profile information from airborne multiax is differential optical absorption spectrometer (AMAXDOAS) measurements with a vertical resolution of 3.0 to 4.5 km in the lower troposphere and 2.0 to 3.5 km near flight altitude. Above 13 km the profile information content of AMAXDOAS measurements is sparse. The retrieval algorithm used in this work is the AMAXDOAS profile retrievalalgorithm (APROVAL).

Further, retrieved profiles with a significant amount (up to 3.2 ppbv) of NO2 in the boundary layer over the Po-valley (Italy) are presented. Airborne multiaxis measurements are thus a promising tool for atmospheric studies in the troposphere.

Summary
NO2 Profile retrieval using airborne multi axis UV-visible skylight absorption measurements over central Europe

Excerpt
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