ACE-FTS measurements across the edge of the winter 2004 Arctic vortex

R  Nassar; P F  Bernath; C D  Boone; G L  Manney; S D  McLeod; C P  Rinsland; R  Skelton; K A  Walker

doi:10.1029/2005GL022671

ACE-FTS measurements across the edge of the winter 2004 Arctic vortex

R Nassar, P F Bernath, C D Boone, G L Manney, S D McLeod, C P Rinsland, R Skelton, K A Walker

Chemistry

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

Abstract

Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) solar occultation measurements have been used to create volume mixing ratio (VMR) profiles of H2O, CH4, and N2O inside and outside the 2004 Arctic vortex. Using derived meteorological quantities such as potential vorticity, we have classified 450 occultations ( from February and March 2004 spanning 0 to 79.8 degrees N) as vortex, vortex edge, or extravortex. We plot [CH4] versus [N2O] correlations to display the distinct patterns observed for measurements of different air masses and use these correlations to further classify the extravortex occultations as tropical, subtropical, or midlatitude. Using comparisons between high latitude profiles of [N2O], [CH4], and [H2O] inside and outside the Arctic vortex, we estimate upper stratospheric and lower mesospheric descent rates and find that descent in the winter 2004 Arctic vortex was rapid, with evidence of descent at higher altitudes than in past years.

Original language	English
Pages (from-to)	-
Number of pages	5
Journal	Geophysical Research Letters
Volume	32
Issue number	15
DOIs	https://doi.org/10.1029/2005GL022671
Publication status	Published - 1 Jun 2005

Keywords

STRATOSPHERIC POLAR VORTEX
ATMOS MEASUREMENTS
DESCENT
ABUNDANCES
N2O
CH4
AIR

Access to Document

10.1029/2005GL022671

Cite this

@article{ff900f159f5d43af8429f102ed16ae48,

title = "ACE-FTS measurements across the edge of the winter 2004 Arctic vortex",

abstract = "Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) solar occultation measurements have been used to create volume mixing ratio (VMR) profiles of H2O, CH4, and N2O inside and outside the 2004 Arctic vortex. Using derived meteorological quantities such as potential vorticity, we have classified 450 occultations ( from February and March 2004 spanning 0 to 79.8 degrees N) as vortex, vortex edge, or extravortex. We plot [CH4] versus [N2O] correlations to display the distinct patterns observed for measurements of different air masses and use these correlations to further classify the extravortex occultations as tropical, subtropical, or midlatitude. Using comparisons between high latitude profiles of [N2O], [CH4], and [H2O] inside and outside the Arctic vortex, we estimate upper stratospheric and lower mesospheric descent rates and find that descent in the winter 2004 Arctic vortex was rapid, with evidence of descent at higher altitudes than in past years.",

keywords = "STRATOSPHERIC POLAR VORTEX, ATMOS MEASUREMENTS, DESCENT, ABUNDANCES, N2O, CH4, AIR",

author = "R Nassar and Bernath, {P F} and Boone, {C D} and Manney, {G L} and McLeod, {S D} and Rinsland, {C P} and R Skelton and Walker, {K A}",

year = "2005",

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T1 - ACE-FTS measurements across the edge of the winter 2004 Arctic vortex

AU - Nassar, R

AU - Bernath, P F

AU - Boone, C D

AU - Manney, G L

AU - McLeod, S D

AU - Rinsland, C P

AU - Skelton, R

AU - Walker, K A

PY - 2005/6/1

Y1 - 2005/6/1

N2 - Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) solar occultation measurements have been used to create volume mixing ratio (VMR) profiles of H2O, CH4, and N2O inside and outside the 2004 Arctic vortex. Using derived meteorological quantities such as potential vorticity, we have classified 450 occultations ( from February and March 2004 spanning 0 to 79.8 degrees N) as vortex, vortex edge, or extravortex. We plot [CH4] versus [N2O] correlations to display the distinct patterns observed for measurements of different air masses and use these correlations to further classify the extravortex occultations as tropical, subtropical, or midlatitude. Using comparisons between high latitude profiles of [N2O], [CH4], and [H2O] inside and outside the Arctic vortex, we estimate upper stratospheric and lower mesospheric descent rates and find that descent in the winter 2004 Arctic vortex was rapid, with evidence of descent at higher altitudes than in past years.

AB - Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) solar occultation measurements have been used to create volume mixing ratio (VMR) profiles of H2O, CH4, and N2O inside and outside the 2004 Arctic vortex. Using derived meteorological quantities such as potential vorticity, we have classified 450 occultations ( from February and March 2004 spanning 0 to 79.8 degrees N) as vortex, vortex edge, or extravortex. We plot [CH4] versus [N2O] correlations to display the distinct patterns observed for measurements of different air masses and use these correlations to further classify the extravortex occultations as tropical, subtropical, or midlatitude. Using comparisons between high latitude profiles of [N2O], [CH4], and [H2O] inside and outside the Arctic vortex, we estimate upper stratospheric and lower mesospheric descent rates and find that descent in the winter 2004 Arctic vortex was rapid, with evidence of descent at higher altitudes than in past years.

KW - STRATOSPHERIC POLAR VORTEX

KW - ATMOS MEASUREMENTS

KW - DESCENT

KW - ABUNDANCES

KW - N2O

KW - CH4

KW - AIR

U2 - 10.1029/2005GL022671

DO - 10.1029/2005GL022671

M3 - Article

VL - 32

SP - -

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 15

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