The polar stratospheric cloud event of January 24: Part 2, PHotochemistry

R. L. Jones; S. Solomon; D. S. McKenna; L. R. Poole; W. H. Brune; D. W. Toohey; J. G. Anderson; D. W. Fahey

doi:10.1029/GL017i004p00541

The polar stratospheric cloud event of January 24: Part 2, PHotochemistry

R. L. Jones, S. Solomon, D. S. McKenna, L. R. Poole, W. H. Brune, D. W. Toohey, J. G. Anderson, D. W. Fahey

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Abstract

During the 1988/89 Airborne Arctic Stratospheric Expedition (AASE), observations of the chemical composition, aerosol characteristics and atmospheric state were obtained from two aircraft, a NASA ER‐2 and a DC‐8. In this paper we present a diagnosis of observations obtained using the ER‐2 on January 24, 1989, using a Lagrangian coupled microphysical‐photochemical model. We interpret the high chlorine monoxide mixing ratios observed from the ER‐2 on the afternoon of January 24, 1989 as a result of in situ heterogeneous release of reactive chlorine from the reservoirs HCl and ClONO₂ on type 1 polar stratospheric cloud particles observed to be present at that time. This essential element in theories of polar ozone depletion has never before been observed directly in the stratosphere.

Original language	English (US)
Pages (from-to)	541-544
Number of pages	4
Journal	Geophysical Research Letters
Volume	17
Issue number	4
DOIs	https://doi.org/10.1029/GL017i004p00541
State	Published - Mar 1990

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Geophysics
Earth and Planetary Sciences(all)

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title = "The polar stratospheric cloud event of January 24: Part 2, PHotochemistry",

abstract = "During the 1988/89 Airborne Arctic Stratospheric Expedition (AASE), observations of the chemical composition, aerosol characteristics and atmospheric state were obtained from two aircraft, a NASA ER‐2 and a DC‐8. In this paper we present a diagnosis of observations obtained using the ER‐2 on January 24, 1989, using a Lagrangian coupled microphysical‐photochemical model. We interpret the high chlorine monoxide mixing ratios observed from the ER‐2 on the afternoon of January 24, 1989 as a result of in situ heterogeneous release of reactive chlorine from the reservoirs HCl and ClONO2 on type 1 polar stratospheric cloud particles observed to be present at that time. This essential element in theories of polar ozone depletion has never before been observed directly in the stratosphere.",

author = "Jones, {R. L.} and S. Solomon and McKenna, {D. S.} and Poole, {L. R.} and Brune, {W. H.} and Toohey, {D. W.} and Anderson, {J. G.} and Fahey, {D. W.}",

year = "1990",

month = mar,

doi = "10.1029/GL017i004p00541",

language = "English (US)",

volume = "17",

pages = "541--544",

journal = "Geophysical Research Letters",

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T1 - The polar stratospheric cloud event of January 24

T2 - Part 2, PHotochemistry

AU - Jones, R. L.

AU - Solomon, S.

AU - McKenna, D. S.

AU - Poole, L. R.

AU - Brune, W. H.

AU - Toohey, D. W.

AU - Anderson, J. G.

AU - Fahey, D. W.

PY - 1990/3

Y1 - 1990/3

N2 - During the 1988/89 Airborne Arctic Stratospheric Expedition (AASE), observations of the chemical composition, aerosol characteristics and atmospheric state were obtained from two aircraft, a NASA ER‐2 and a DC‐8. In this paper we present a diagnosis of observations obtained using the ER‐2 on January 24, 1989, using a Lagrangian coupled microphysical‐photochemical model. We interpret the high chlorine monoxide mixing ratios observed from the ER‐2 on the afternoon of January 24, 1989 as a result of in situ heterogeneous release of reactive chlorine from the reservoirs HCl and ClONO2 on type 1 polar stratospheric cloud particles observed to be present at that time. This essential element in theories of polar ozone depletion has never before been observed directly in the stratosphere.

AB - During the 1988/89 Airborne Arctic Stratospheric Expedition (AASE), observations of the chemical composition, aerosol characteristics and atmospheric state were obtained from two aircraft, a NASA ER‐2 and a DC‐8. In this paper we present a diagnosis of observations obtained using the ER‐2 on January 24, 1989, using a Lagrangian coupled microphysical‐photochemical model. We interpret the high chlorine monoxide mixing ratios observed from the ER‐2 on the afternoon of January 24, 1989 as a result of in situ heterogeneous release of reactive chlorine from the reservoirs HCl and ClONO2 on type 1 polar stratospheric cloud particles observed to be present at that time. This essential element in theories of polar ozone depletion has never before been observed directly in the stratosphere.

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The polar stratospheric cloud event of January 24: Part 2, PHotochemistry

Abstract

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