Airborne measurements of BrO and the sum of HOBr and Br2 over the Tropical West Pacific from 1 to 15km during the CONvective TRansport of Active Species in the Tropics (CONTRAST) experiment

被引：18

作者：

Chen, Dexian ^{[1
]}

Huey, L. Gregory ^{[1
]}

Tanner, David J. ^{[1
]}

Salawitch, Ross J. ^{[2
,3
,4
]}

Anderson, Daniel C. ^{[2
]}

Wales, Pamela A. ^{[3
]}

Pan, Laura L. ^{[5
]}

Atlas, Elliot L. ^{[6
]}

Hornbrook, Rebecca S. ^{[5
]}

Apel, Eric C. ^{[5
]}

Blake, Nicola J. ^{[7
]}

Campos, Teresa L. ^{[5
]}

Donets, Valeria ^{[6
]}

Flocke, Frank M. ^{[5
]}

Hall, Samuel R. ^{[5
]}

Hanisco, Thomas F. ^{[8
]}

Hills, Alan J. ^{[5
]}

Honomichl, Shawn B. ^{[5
]}

Jensen, Jorgen B. ^{[5
]}

Kaser, Lisa ^{[5
]}

Montzka, Denise D. ^{[5
]}

Nicely, Julie M. ^{[3
,8
]}

Reeves, J. Michael ^{[5
]}

Riemer, Daniel D. ^{[6
]}

Schauffler, Sue M. ^{[5
]}

Ullmann, Kirk ^{[5
]}

Weinheimer, Andrew J. ^{[5
]}

Wolfe, Glenn M. ^{[8
,9
]}

机构：

[1] Georgia Tech, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA

[2] Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD USA

[3] Univ Maryland, Dept Chem & Biochem, College Pk, MD USA

[4] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD USA

[5] Natl Ctr Atmospher Res, Boulder, CO USA

[6] Univ Miami, Rosenstiel Sch Marine & Atmospher Chem, Coral Gables, FL USA

[7] Univ Calif Irvine, Dept Chem, Irvine, CA USA

[8] NASA Goddard Space Flight Ctr, Atmospher Chem & Dynam Lab, Greenbelt, MD USA

[9] Univ Maryland, Joint Ctr Earth Syst Technol, Baltimore, MD USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2016年 / 121卷 / 20期

基金：

美国国家科学基金会;

关键词：

bromine oxide; hypobromous acid; CONTRAST; hydrobromic acid; product gas injection; IONIZATION MASS-SPECTROMETRY; ATMOSPHERIC CHEMISTRY; STRATOSPHERIC BROMINE; DOAS MEASUREMENTS; ORGANIC BROMINE; OZONE; TROPOPAUSE; CHLORINE; TROPOSPHERE; BROMOCARBONS;

D O I：

10.1002/2016JD025561

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

A chemical ionization mass spectrometer was used to measure BrO and HOBr+Br-2 over the Tropical West Pacific Ocean within the altitude range of 1 to 15km, during the CONvective TRansport of Active Species in the Tropics (CONTRAST) campaign in 2014. Isolated episodes of elevated BrO (up to 6.6pptv) and/or HOBr+Br-2 (up to 7.3pptv) were observed in the tropical free troposphere (TFT) and were associated with biomass burning. However, most of the time we did not observe significant BrO or HOBr+Br-2 in the TFT and the tropical tropopause layer (TTL) above our limits of detection (LOD). The 1min average LOD for BrO ranged from 0.6 to 1.6pptv and for HOBr+Br-2 ranged from 1.3 to 3.5pptv. During one flight, BrO observations from the TTL to the extratropical lowermost stratosphere were used to infer a profile of inorganic bromine (Br-y). Based on this profile, we estimated the product gas injection of bromine species into the stratosphere to be 2pptv. Analysis of Br-y partitioning further indicates that BrO levels are likely very low in the TFT environment and that future studies should target the measurement of HBr or atomic Br.

引用

页码：12560 / 12578

页数：19

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