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Characterization of Soluble Bromide Measurements and a Case Study of Bro Observations During Arctas : Volume 11, Issue 9 (29/09/2011)

By Liao, J.

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Book Id: WPLBN0003995652
Format Type: PDF Article :
File Size: Pages 32
Reproduction Date: 2015

Title: Characterization of Soluble Bromide Measurements and a Case Study of Bro Observations During Arctas : Volume 11, Issue 9 (29/09/2011)  
Author: Liao, J.
Volume: Vol. 11, Issue 9
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Dibb, J. E., Scheuer, E., Anderson, B., Tanner, D. J., Kurosu, T., Canty, T.,...Huey, L. G. (2011). Characterization of Soluble Bromide Measurements and a Case Study of Bro Observations During Arctas : Volume 11, Issue 9 (29/09/2011). Retrieved from

Description: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA. A focus of the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) mission was examination of bromine photochemistry in the spring time, high latitude troposphere based on aircraft and satellite measurements of BrO and related species. The NASA DC-8 aircraft utilized a chemical ionization mass spectrometry (CIMS) instrument to measure BrO and a mist chamber (MC) to measure soluble bromide. We have determined that the MC detection efficiency to molecular bromine (Br2), hypobromous acid (HOBr), bromine oxide (BrO), and hydrogen bromide (HBr) as soluble bromide (Br) was 0.9±0.1, 1.06±0.30, 0.4±0.1, and 0.95±0.1, respectively. These efficiency factors were used to estimate soluble bromide levels along the DC-8 flight track of 17 April 2008 from photochemical calculations constrained to in situ BrO measured by CIMS. During this flight, the highest levels of soluble bromide and BrO were observed and atmospheric conditions were ideal for the space-borne observation of BrO. The good agreement (R2 = 0.76; slope = 0.98; intercept = −3.5 pptv) between modeled and observed soluble bromide, when BrO was above detection limit (>2 pptv) under unpolluted conditions (NO < 100 pptv), indicates that the CIMS BrO measurements were consistent with the MC soluble bromide. Tropospheric BrO vertical column densities (BROTROPVCD) derived from CIMS BrO observations compare well with BROTROPVCD from OMI on 17 April 2008.

Characterization of soluble bromide measurements and a case study of BrO observations during ARCTAS

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