A method for estimating the extent of denitrification of Arctic polar vortex air from tracer-tracer scatter plots
A method for estimating the extent of denitrification of Arctic polar vortex air is proposed. Previous estimates of denitrification using tracer-tracer scatter plots have not allowed for mixing-induced changes in tracer-tracer relationships in a sufficiently general way. This difficulty is overcome...
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2002
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ftucl:oai:eprints.ucl.ac.uk.OAI2:82574 2023-12-24T10:13:29+01:00 A method for estimating the extent of denitrification of Arctic polar vortex air from tracer-tracer scatter plots Esler, JG Waugh, DW 2002-07 application/pdf https://discovery.ucl.ac.uk/id/eprint/82574/1/2001JD001071.pdf https://discovery.ucl.ac.uk/id/eprint/82574/ eng eng AMER GEOPHYSICAL UNION https://discovery.ucl.ac.uk/id/eprint/82574/1/2001JD001071.pdf https://discovery.ucl.ac.uk/id/eprint/82574/ open J GEOPHYS RES-ATMOS , 107 (D13) , Article 4169. (2002) Denitrification Stratosphere Scatter plots Arctic Vortex Ozone loss Stratospheric abundances Aircraft measurements Profile observations Vertical structure Atmos measurements Winter Transport N2O Photochemistry Article 2002 ftucl 2023-11-27T13:07:32Z A method for estimating the extent of denitrification of Arctic polar vortex air is proposed. Previous estimates of denitrification using tracer-tracer scatter plots have not allowed for mixing-induced changes in tracer-tracer relationships in a sufficiently general way. This difficulty is overcome by constructing an artificial "reference tracer'' from a linear combination of other long-lived tracers. The reference tracer is designed so that, as far as possible, it has a linear canonical relationship with NOy in midlatitudes. A linear relationship is unaffected by mixing, so denitrification is apparent as deviations of vortex measurements from the linear midlatitude relationship. The method is first demonstrated using data from a chemical transport model in which no denitrification processes are present. It is then applied to balloon, aircraft and shuttle-borne measurements made before and during the breakdown of the Arctic vortex in 1992-1993 and 1996-1997. In each case the method indicates that little or no denitrification had occurred in any of the vortex air encountered. When the method is applied to the southern hemisphere vortex in 1994, by contrast, denitrified air is clearly seen to be present around 19-23 km in the vortex. Article in Journal/Newspaper Arctic University College London: UCL Discovery Arctic |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Denitrification Stratosphere Scatter plots Arctic Vortex Ozone loss Stratospheric abundances Aircraft measurements Profile observations Vertical structure Atmos measurements Winter Transport N2O Photochemistry |
spellingShingle |
Denitrification Stratosphere Scatter plots Arctic Vortex Ozone loss Stratospheric abundances Aircraft measurements Profile observations Vertical structure Atmos measurements Winter Transport N2O Photochemistry Esler, JG Waugh, DW A method for estimating the extent of denitrification of Arctic polar vortex air from tracer-tracer scatter plots |
topic_facet |
Denitrification Stratosphere Scatter plots Arctic Vortex Ozone loss Stratospheric abundances Aircraft measurements Profile observations Vertical structure Atmos measurements Winter Transport N2O Photochemistry |
description |
A method for estimating the extent of denitrification of Arctic polar vortex air is proposed. Previous estimates of denitrification using tracer-tracer scatter plots have not allowed for mixing-induced changes in tracer-tracer relationships in a sufficiently general way. This difficulty is overcome by constructing an artificial "reference tracer'' from a linear combination of other long-lived tracers. The reference tracer is designed so that, as far as possible, it has a linear canonical relationship with NOy in midlatitudes. A linear relationship is unaffected by mixing, so denitrification is apparent as deviations of vortex measurements from the linear midlatitude relationship. The method is first demonstrated using data from a chemical transport model in which no denitrification processes are present. It is then applied to balloon, aircraft and shuttle-borne measurements made before and during the breakdown of the Arctic vortex in 1992-1993 and 1996-1997. In each case the method indicates that little or no denitrification had occurred in any of the vortex air encountered. When the method is applied to the southern hemisphere vortex in 1994, by contrast, denitrified air is clearly seen to be present around 19-23 km in the vortex. |
format |
Article in Journal/Newspaper |
author |
Esler, JG Waugh, DW |
author_facet |
Esler, JG Waugh, DW |
author_sort |
Esler, JG |
title |
A method for estimating the extent of denitrification of Arctic polar vortex air from tracer-tracer scatter plots |
title_short |
A method for estimating the extent of denitrification of Arctic polar vortex air from tracer-tracer scatter plots |
title_full |
A method for estimating the extent of denitrification of Arctic polar vortex air from tracer-tracer scatter plots |
title_fullStr |
A method for estimating the extent of denitrification of Arctic polar vortex air from tracer-tracer scatter plots |
title_full_unstemmed |
A method for estimating the extent of denitrification of Arctic polar vortex air from tracer-tracer scatter plots |
title_sort |
method for estimating the extent of denitrification of arctic polar vortex air from tracer-tracer scatter plots |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2002 |
url |
https://discovery.ucl.ac.uk/id/eprint/82574/1/2001JD001071.pdf https://discovery.ucl.ac.uk/id/eprint/82574/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
J GEOPHYS RES-ATMOS , 107 (D13) , Article 4169. (2002) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/82574/1/2001JD001071.pdf https://discovery.ucl.ac.uk/id/eprint/82574/ |
op_rights |
open |
_version_ |
1786183149488701440 |