In situ observations of BrO over Antarctica: ER-2 aircraft results from 54 degree S to 72 degree S latitude

Journal Article · Thu Nov 30 04:00:00 EST 1989 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JD094iD14p16639· OSTI ID:7251842

Brune, W H; Anderson, J G ^[1]; Chan, K R ^[2]

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1. Harvard Univ., Cambridge, MA (United States)
2. NASA Ames Research Center, Mountain View, CA (United States)

Bromine monoxide was observed in situ during nine flights of the NASA ER-2 aircraft from Punta Arenas, Chile (54{degree}S latitude), to 72{degree}S latitude over the Palmer Peninsula, Antarctica. The first flight for the BrO detection system was on August 28. The distribution of BrO inside the chemically perturbed region defined by greatly elevated ClO abundances was different from that found just outside. Inside, the BrO mixing ratio was 6.1 {plus minus} 1.1 pptv above the 440 K potential temperature surface. At high latitudes outside the chemically perturbed region, the BrO mixing ratio was 5.4 {plus minus} 1.4 pptv near the 450 K surface, but decreased to 2.9 {plus minus} 1.2 pptv at the 420 K surface. The abundance of BrO showed no discernable temporal trend during the course of the nine flights. Away from the south polar region, at latitudes between 47{degree}S and 37{degree}N and potential temperatures between 435 and 500 K (18.5- to 20.7-km altitude), the BrO mixing ratio was 0.5-3.0 pptv.

• OSTI ID: 7251842
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 94:D14; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
290301 -- Energy Planning & Policy-- Environment
Health
& Safety-- Regional & Global Environmental Aspects-- (1992-)
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIRCRAFT
ANTARCTIC REGIONS
ANTARCTICA
ATMOSPHERIC CHEMISTRY
BROMINE COMPOUNDS
BROMINE OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHILE
CHLORINE COMPOUNDS
CHLORINE OXIDES
DEVELOPING COUNTRIES
DISTRIBUTION
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
GEOGRAPHICAL VARIATIONS
HALOGEN COMPOUNDS
LATIN AMERICA
LATITUDE EFFECT
MIXING
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
POLAR REGIONS
SOUTH AMERICA
STRATOSPHERE
VARIATIONS