Global phosgene observations from the atmospheric chemistry experiment (ACE) mission

Dejian Fu; Chris D. Boone; Peter F. Bernath; Kaley A. Walker; Ray Nassar; Gloria L. Manney; Sean D. McLeod

doi:10.1029/2007GL029942

Global phosgene observations from the atmospheric chemistry experiment (ACE) mission

Dejian Fu, Chris D. Boone, Peter F. Bernath, Kaley A. Walker, Ray Nassar, Gloria L. Manney, Sean D. McLeod

Chemistry

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

Abstract

The first study of the global distribution of atmospheric phosgene (COCl2) has been performed using solar occultation measurements from the Atmospheric Chemistry Experiment ( ACE) satellite mission. A total of 5614 measured profiles spanning the period February 2004 through May 2006 were used in the study. The phosgene concentrations display a zonally symmetric pattern with the maximum concentration located approximately over the equator at about 25 km in altitude and the concentration decreases towards the poles. A layer of enhanced concentration of phosgene spans the lower stratosphere over all latitudes, with volume mixing ratios of 20-60 pptv. The ACE observations show lower phosgene concentrations in the stratosphere than were obtained from previous observations in the 1980s and 1990s. This has been attributed to a significant decrease in its source species, particularly two major sources CH3CCl3 and CCl4, since the introduction of restrictions required by the Montreal Protocol and its amendments.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Geophysical Research Letters
Volume	34
Issue number	17
DOIs	https://doi.org/10.1029/2007GL029942
Publication status	Published - 14 Sep 2007

Keywords

STRATOSPHERIC CHLORINE
HALOCARBONS
TROPOSPHERE
PACIFIC
AIR

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10.1029/2007GL029942

http://onlinelibrary.wiley.com/doi/10.1029/2007GL029942/abstract

Cite this

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title = "Global phosgene observations from the atmospheric chemistry experiment (ACE) mission",

abstract = "The first study of the global distribution of atmospheric phosgene (COCl2) has been performed using solar occultation measurements from the Atmospheric Chemistry Experiment ( ACE) satellite mission. A total of 5614 measured profiles spanning the period February 2004 through May 2006 were used in the study. The phosgene concentrations display a zonally symmetric pattern with the maximum concentration located approximately over the equator at about 25 km in altitude and the concentration decreases towards the poles. A layer of enhanced concentration of phosgene spans the lower stratosphere over all latitudes, with volume mixing ratios of 20-60 pptv. The ACE observations show lower phosgene concentrations in the stratosphere than were obtained from previous observations in the 1980s and 1990s. This has been attributed to a significant decrease in its source species, particularly two major sources CH3CCl3 and CCl4, since the introduction of restrictions required by the Montreal Protocol and its amendments.",

keywords = "STRATOSPHERIC CHLORINE, HALOCARBONS, TROPOSPHERE, PACIFIC, AIR",

author = "Dejian Fu and Boone, {Chris D.} and Bernath, {Peter F.} and Walker, {Kaley A.} and Ray Nassar and Manney, {Gloria L.} and McLeod, {Sean D.}",

year = "2007",

month = sep,

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doi = "10.1029/2007GL029942",

language = "English",

volume = "34",

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T1 - Global phosgene observations from the atmospheric chemistry experiment (ACE) mission

AU - Fu, Dejian

AU - Boone, Chris D.

AU - Bernath, Peter F.

AU - Walker, Kaley A.

AU - Nassar, Ray

AU - Manney, Gloria L.

AU - McLeod, Sean D.

PY - 2007/9/14

Y1 - 2007/9/14

N2 - The first study of the global distribution of atmospheric phosgene (COCl2) has been performed using solar occultation measurements from the Atmospheric Chemistry Experiment ( ACE) satellite mission. A total of 5614 measured profiles spanning the period February 2004 through May 2006 were used in the study. The phosgene concentrations display a zonally symmetric pattern with the maximum concentration located approximately over the equator at about 25 km in altitude and the concentration decreases towards the poles. A layer of enhanced concentration of phosgene spans the lower stratosphere over all latitudes, with volume mixing ratios of 20-60 pptv. The ACE observations show lower phosgene concentrations in the stratosphere than were obtained from previous observations in the 1980s and 1990s. This has been attributed to a significant decrease in its source species, particularly two major sources CH3CCl3 and CCl4, since the introduction of restrictions required by the Montreal Protocol and its amendments.

AB - The first study of the global distribution of atmospheric phosgene (COCl2) has been performed using solar occultation measurements from the Atmospheric Chemistry Experiment ( ACE) satellite mission. A total of 5614 measured profiles spanning the period February 2004 through May 2006 were used in the study. The phosgene concentrations display a zonally symmetric pattern with the maximum concentration located approximately over the equator at about 25 km in altitude and the concentration decreases towards the poles. A layer of enhanced concentration of phosgene spans the lower stratosphere over all latitudes, with volume mixing ratios of 20-60 pptv. The ACE observations show lower phosgene concentrations in the stratosphere than were obtained from previous observations in the 1980s and 1990s. This has been attributed to a significant decrease in its source species, particularly two major sources CH3CCl3 and CCl4, since the introduction of restrictions required by the Montreal Protocol and its amendments.

KW - STRATOSPHERIC CHLORINE

KW - HALOCARBONS

KW - TROPOSPHERE

KW - PACIFIC

KW - AIR

U2 - 10.1029/2007GL029942

DO - 10.1029/2007GL029942

M3 - Article

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SP - 1

EP - 5

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 17

ER -