Measurements of HCFC-142b and HCFC-141b in the Cape Grim air archive: 1978-1993

D.E. Oram; C.E. Reeves; S.A. Penkett; P.J. Fraser

doi:10.1029/95GL02849

Measurements of HCFC-142b and HCFC-141b in the Cape Grim air archive: 1978-1993

D.E. Oram, C.E. Reeves, S.A. Penkett, P.J. Fraser

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Abstract

Stored air samples collected at Cape Grim, Tasmania since 1978, have been analyzed by GC-MS to investigate the change in the tropospheric concentration of HCFC-142b and HCFC-141b over the past 15 years. Between April 1978 and September 1993 the concentration of HCFC-142b rose, with the majority of this increase occurring from 1989 onwards. From 1989 to 1991 the average concentration of HCFC-141b was 0.08 ± 0.01 pptv. A very sharp increase in concentration began in 1992 however. Using a 2-D model of atmospheric chemistry, constrained by these observations, global emissions of these two compounds have been calculated and found to differ from other estimates. -from Authors

Original language	English
Pages (from-to)	2741-2744
Number of pages	4
Journal	Geophysical Research Letters
Volume	22
Issue number	20
DOIs	https://doi.org/10.1029/95GL02849
Publication status	Published - 15 Oct 1995

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abstract = "Stored air samples collected at Cape Grim, Tasmania since 1978, have been analyzed by GC-MS to investigate the change in the tropospheric concentration of HCFC-142b and HCFC-141b over the past 15 years. Between April 1978 and September 1993 the concentration of HCFC-142b rose, with the majority of this increase occurring from 1989 onwards. From 1989 to 1991 the average concentration of HCFC-141b was 0.08 ± 0.01 pptv. A very sharp increase in concentration began in 1992 however. Using a 2-D model of atmospheric chemistry, constrained by these observations, global emissions of these two compounds have been calculated and found to differ from other estimates. -from Authors",

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AU - Penkett, S.A.

AU - Fraser, P.J.

PY - 1995/10/15

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AB - Stored air samples collected at Cape Grim, Tasmania since 1978, have been analyzed by GC-MS to investigate the change in the tropospheric concentration of HCFC-142b and HCFC-141b over the past 15 years. Between April 1978 and September 1993 the concentration of HCFC-142b rose, with the majority of this increase occurring from 1989 onwards. From 1989 to 1991 the average concentration of HCFC-141b was 0.08 ± 0.01 pptv. A very sharp increase in concentration began in 1992 however. Using a 2-D model of atmospheric chemistry, constrained by these observations, global emissions of these two compounds have been calculated and found to differ from other estimates. -from Authors

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Measurements of HCFC-142b and HCFC-141b in the Cape Grim air archive: 1978-1993

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