Measurements of the entrainment of hydrogen peroxide into cloud systems

M. W. Gallagher; T. W. Choularton; R. Downer; B. J. Tyler; I. M. Stromberg; C. S. Mill; S. A. Penkett; B. Bandy; G. J. Dollard; T. J. Davies; B. M R Jones

Measurements of the entrainment of hydrogen peroxide into cloud systems

M. W. Gallagher, T. W. Choularton, R. Downer, B. J. Tyler, I. M. Stromberg, C. S. Mill, S. A. Penkett, B. Bandy, G. J. Dollard, T. J. Davies, B. M R Jones

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Abstract

Detailed measurements from an aircraft of the vertical structure of hydrogen peroxide with detailed ground-based measurements of the chemistry of an airstream entering a hill cap cloud are presented together with measurements of the microphysics and chemistry of the cloud. Two case studies have been selected in which the cloud is being affected by the entrainment of air from outside its boundaries. The major findings are: (1) when the boundary layer is polluted the concentration of gas-phase hydrogen peroxide was observed to increase markedly with altitude in the lower troposphere; (2) the maximum concentrations of hydrogen peroxide were found close to the surfaces of clouds and were up to 10 times greater than concentrations in the boundary layer on the same day and (3) the entrainment of this hydrogen peroxide into the cap cloud had a profound effect on the chemistry of the cloud.

Original language	English
Pages (from-to)	2029-2038
Number of pages	9
Journal	Atmospheric Environment - Part A General Topics
Volume	25
Issue number	9
Publication status	Published - 1991

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@article{b30cf4fbc30343febd5cb0a120e0df28,

title = "Measurements of the entrainment of hydrogen peroxide into cloud systems",

abstract = "Detailed measurements from an aircraft of the vertical structure of hydrogen peroxide with detailed ground-based measurements of the chemistry of an airstream entering a hill cap cloud are presented together with measurements of the microphysics and chemistry of the cloud. Two case studies have been selected in which the cloud is being affected by the entrainment of air from outside its boundaries. The major findings are: (1) when the boundary layer is polluted the concentration of gas-phase hydrogen peroxide was observed to increase markedly with altitude in the lower troposphere; (2) the maximum concentrations of hydrogen peroxide were found close to the surfaces of clouds and were up to 10 times greater than concentrations in the boundary layer on the same day and (3) the entrainment of this hydrogen peroxide into the cap cloud had a profound effect on the chemistry of the cloud.",

author = "Gallagher, {M. W.} and Choularton, {T. W.} and R. Downer and Tyler, {B. J.} and Stromberg, {I. M.} and Mill, {C. S.} and Penkett, {S. A.} and B. Bandy and Dollard, {G. J.} and Davies, {T. J.} and Jones, {B. M R}",

year = "1991",

language = "English",

volume = "25",

pages = "2029--2038",

journal = "Atmospheric Environment - Part A General Topics",

issn = "0004-6981",

publisher = "Elsevier BV",

number = "9",

}

TY - JOUR

T1 - Measurements of the entrainment of hydrogen peroxide into cloud systems

AU - Gallagher, M. W.

AU - Choularton, T. W.

AU - Downer, R.

AU - Tyler, B. J.

AU - Stromberg, I. M.

AU - Mill, C. S.

AU - Penkett, S. A.

AU - Bandy, B.

AU - Dollard, G. J.

AU - Davies, T. J.

AU - Jones, B. M R

PY - 1991

Y1 - 1991

N2 - Detailed measurements from an aircraft of the vertical structure of hydrogen peroxide with detailed ground-based measurements of the chemistry of an airstream entering a hill cap cloud are presented together with measurements of the microphysics and chemistry of the cloud. Two case studies have been selected in which the cloud is being affected by the entrainment of air from outside its boundaries. The major findings are: (1) when the boundary layer is polluted the concentration of gas-phase hydrogen peroxide was observed to increase markedly with altitude in the lower troposphere; (2) the maximum concentrations of hydrogen peroxide were found close to the surfaces of clouds and were up to 10 times greater than concentrations in the boundary layer on the same day and (3) the entrainment of this hydrogen peroxide into the cap cloud had a profound effect on the chemistry of the cloud.

AB - Detailed measurements from an aircraft of the vertical structure of hydrogen peroxide with detailed ground-based measurements of the chemistry of an airstream entering a hill cap cloud are presented together with measurements of the microphysics and chemistry of the cloud. Two case studies have been selected in which the cloud is being affected by the entrainment of air from outside its boundaries. The major findings are: (1) when the boundary layer is polluted the concentration of gas-phase hydrogen peroxide was observed to increase markedly with altitude in the lower troposphere; (2) the maximum concentrations of hydrogen peroxide were found close to the surfaces of clouds and were up to 10 times greater than concentrations in the boundary layer on the same day and (3) the entrainment of this hydrogen peroxide into the cap cloud had a profound effect on the chemistry of the cloud.

M3 - Article

SN - 0004-6981

VL - 25

SP - 2029

EP - 2038

JO - Atmospheric Environment - Part A General Topics

JF - Atmospheric Environment - Part A General Topics

IS - 9

ER -

Measurements of the entrainment of hydrogen peroxide into cloud systems

Abstract

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