Latitudinal distribution of atmospheric methyl bromide: Measurements and modeling

Y. Yokouchi; T. Machida; L. A. Barrie; D. Toom-Sauntry; Y. Nojiri; Y. Fujinuma; Y. Inuzuka; H. J. Li; H. Akimoto; S. Aoki

doi:10.1029/1999GL010884

Latitudinal distribution of atmospheric methyl bromide: Measurements and modeling

Y. Yokouchi, T. Machida, L. A. Barrie, D. Toom-Sauntry, Y. Nojiri, Y. Fujinuma, Y. Inuzuka, H. J. Li, H. Akimoto, S. Aoki

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The global distribution of atmospheric methyl bromide (CH₃Br) obtained from extensive new measurements of atmospheric CH₃Br from latitude 82.5°N to 69.1°S, showed a small decrease from mid- to high-latitudes, a gradient between the northern and southern hemispheres with a ratio of 1.2 to 1.3, and occasional high concentrations in the tropics. The observed data and modeled distributions of industrial CH₃Br were used to apportion CH₃Br between natural and industrial components for both hemisphere. We obtained an estimated man-made contribution of 4.3 pptv and 2.3 pptv in the northern and southern hemispheres, respectively and a natural (non-industrial) background concentration in both hemispheres of 6 pptv with a slight increase in the tropics.

Original language	English
Pages (from-to)	697-700
Number of pages	4
Journal	Geophysical Research Letters
Volume	27
Issue number	5
DOIs	https://doi.org/10.1029/1999GL010884
Publication status	Published - 2000 Mar 1
Externally published	Yes

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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10.1029/1999GL010884

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title = "Latitudinal distribution of atmospheric methyl bromide: Measurements and modeling",

abstract = "The global distribution of atmospheric methyl bromide (CH3Br) obtained from extensive new measurements of atmospheric CH3Br from latitude 82.5°N to 69.1°S, showed a small decrease from mid- to high-latitudes, a gradient between the northern and southern hemispheres with a ratio of 1.2 to 1.3, and occasional high concentrations in the tropics. The observed data and modeled distributions of industrial CH3Br were used to apportion CH3Br between natural and industrial components for both hemisphere. We obtained an estimated man-made contribution of 4.3 pptv and 2.3 pptv in the northern and southern hemispheres, respectively and a natural (non-industrial) background concentration in both hemispheres of 6 pptv with a slight increase in the tropics.",

author = "Y. Yokouchi and T. Machida and Barrie, {L. A.} and D. Toom-Sauntry and Y. Nojiri and Y. Fujinuma and Y. Inuzuka and Li, {H. J.} and H. Akimoto and S. Aoki",

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TY - JOUR

T1 - Latitudinal distribution of atmospheric methyl bromide

T2 - Measurements and modeling

AU - Yokouchi, Y.

AU - Machida, T.

AU - Barrie, L. A.

AU - Toom-Sauntry, D.

AU - Nojiri, Y.

AU - Fujinuma, Y.

AU - Inuzuka, Y.

AU - Li, H. J.

AU - Akimoto, H.

AU - Aoki, S.

PY - 2000/3/1

Y1 - 2000/3/1

N2 - The global distribution of atmospheric methyl bromide (CH3Br) obtained from extensive new measurements of atmospheric CH3Br from latitude 82.5°N to 69.1°S, showed a small decrease from mid- to high-latitudes, a gradient between the northern and southern hemispheres with a ratio of 1.2 to 1.3, and occasional high concentrations in the tropics. The observed data and modeled distributions of industrial CH3Br were used to apportion CH3Br between natural and industrial components for both hemisphere. We obtained an estimated man-made contribution of 4.3 pptv and 2.3 pptv in the northern and southern hemispheres, respectively and a natural (non-industrial) background concentration in both hemispheres of 6 pptv with a slight increase in the tropics.

AB - The global distribution of atmospheric methyl bromide (CH3Br) obtained from extensive new measurements of atmospheric CH3Br from latitude 82.5°N to 69.1°S, showed a small decrease from mid- to high-latitudes, a gradient between the northern and southern hemispheres with a ratio of 1.2 to 1.3, and occasional high concentrations in the tropics. The observed data and modeled distributions of industrial CH3Br were used to apportion CH3Br between natural and industrial components for both hemisphere. We obtained an estimated man-made contribution of 4.3 pptv and 2.3 pptv in the northern and southern hemispheres, respectively and a natural (non-industrial) background concentration in both hemispheres of 6 pptv with a slight increase in the tropics.

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DO - 10.1029/1999GL010884

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VL - 27

SP - 697

EP - 700

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 5

ER -

Latitudinal distribution of atmospheric methyl bromide: Measurements and modeling

Abstract

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