A joint data record of tropospheric ozone from Aura-TES and MetOp-IASI

Hilke Oetjen; Vivienne H. Payne; Jessica L. Neu; Susan S. Kulawik; David P. Edwards; Annmarie Eldering; Helen M. Worden; John R. Worden

doi:10.5194/acp-16-10229-2016

A joint data record of tropospheric ozone from Aura-TES and MetOp-IASI

Hilke Oetjen, Vivienne H. Payne, Jessica L. Neu, Susan S. Kulawik, David P. Edwards, Annmarie Eldering, Helen M. Worden, John R. Worden

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

13 Scopus citations

Abstract

The Tropospheric Emission Spectrometer (TES) on Aura and Infrared Atmospheric Sounding Interferometer (IASI) on MetOp-A together provide a time series of 10 years of free-tropospheric ozone with an overlap of 3 years. We characterise the differences between TES and IASI ozone measurements and find that IASI's coarser vertical sensitivity leads to a small (>5 ppb) low bias relative to TES for the free troposphere. The TES-IASI differences are not dependent on season or any other factor and hence the measurements from the two instruments can be merged, after correcting for the offset, in order to study decadal-scale changes in tropospheric ozone. We calculate time series of regional monthly mean ozone in the free troposphere over eastern Asia, the western United States (US), and Europe, carefully accounting for differences in spatial sampling between the instruments. We show that free-tropospheric ozone over Europe and the western US has remained relatively constant over the past decade but that, contrary to expectations, ozone over Asia in recent years does not continue the rapid rate of increase observed from 2004 to 2010.

Original language	English
Pages (from-to)	10229-10239
Number of pages	11
Journal	Atmospheric Chemistry and Physics
Volume	16
Issue number	15
DOIs	https://doi.org/10.5194/acp-16-10229-2016
State	Published - Aug 12 2016
Externally published	Yes

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@article{0d1fca596d1e40099e661a355102a8fd,

title = "A joint data record of tropospheric ozone from Aura-TES and MetOp-IASI",

abstract = "The Tropospheric Emission Spectrometer (TES) on Aura and Infrared Atmospheric Sounding Interferometer (IASI) on MetOp-A together provide a time series of 10 years of free-tropospheric ozone with an overlap of 3 years. We characterise the differences between TES and IASI ozone measurements and find that IASI's coarser vertical sensitivity leads to a small (>5 ppb) low bias relative to TES for the free troposphere. The TES-IASI differences are not dependent on season or any other factor and hence the measurements from the two instruments can be merged, after correcting for the offset, in order to study decadal-scale changes in tropospheric ozone. We calculate time series of regional monthly mean ozone in the free troposphere over eastern Asia, the western United States (US), and Europe, carefully accounting for differences in spatial sampling between the instruments. We show that free-tropospheric ozone over Europe and the western US has remained relatively constant over the past decade but that, contrary to expectations, ozone over Asia in recent years does not continue the rapid rate of increase observed from 2004 to 2010.",

author = "Hilke Oetjen and Payne, \{Vivienne H.\} and Neu, \{Jessica L.\} and Kulawik, \{Susan S.\} and Edwards, \{David P.\} and Annmarie Eldering and Worden, \{Helen M.\} and Worden, \{John R.\}",

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doi = "10.5194/acp-16-10229-2016",

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T1 - A joint data record of tropospheric ozone from Aura-TES and MetOp-IASI

AU - Oetjen, Hilke

AU - Payne, Vivienne H.

AU - Neu, Jessica L.

AU - Kulawik, Susan S.

AU - Edwards, David P.

AU - Eldering, Annmarie

AU - Worden, Helen M.

AU - Worden, John R.

PY - 2016/8/12

Y1 - 2016/8/12

N2 - The Tropospheric Emission Spectrometer (TES) on Aura and Infrared Atmospheric Sounding Interferometer (IASI) on MetOp-A together provide a time series of 10 years of free-tropospheric ozone with an overlap of 3 years. We characterise the differences between TES and IASI ozone measurements and find that IASI's coarser vertical sensitivity leads to a small (>5 ppb) low bias relative to TES for the free troposphere. The TES-IASI differences are not dependent on season or any other factor and hence the measurements from the two instruments can be merged, after correcting for the offset, in order to study decadal-scale changes in tropospheric ozone. We calculate time series of regional monthly mean ozone in the free troposphere over eastern Asia, the western United States (US), and Europe, carefully accounting for differences in spatial sampling between the instruments. We show that free-tropospheric ozone over Europe and the western US has remained relatively constant over the past decade but that, contrary to expectations, ozone over Asia in recent years does not continue the rapid rate of increase observed from 2004 to 2010.

AB - The Tropospheric Emission Spectrometer (TES) on Aura and Infrared Atmospheric Sounding Interferometer (IASI) on MetOp-A together provide a time series of 10 years of free-tropospheric ozone with an overlap of 3 years. We characterise the differences between TES and IASI ozone measurements and find that IASI's coarser vertical sensitivity leads to a small (>5 ppb) low bias relative to TES for the free troposphere. The TES-IASI differences are not dependent on season or any other factor and hence the measurements from the two instruments can be merged, after correcting for the offset, in order to study decadal-scale changes in tropospheric ozone. We calculate time series of regional monthly mean ozone in the free troposphere over eastern Asia, the western United States (US), and Europe, carefully accounting for differences in spatial sampling between the instruments. We show that free-tropospheric ozone over Europe and the western US has remained relatively constant over the past decade but that, contrary to expectations, ozone over Asia in recent years does not continue the rapid rate of increase observed from 2004 to 2010.

UR - https://www.scopus.com/pages/publications/84982162273

U2 - 10.5194/acp-16-10229-2016

DO - 10.5194/acp-16-10229-2016

M3 - Article

AN - SCOPUS:84982162273

SN - 1680-7316

VL - 16

SP - 10229

EP - 10239

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

IS - 15

ER -

A joint data record of tropospheric ozone from Aura-TES and MetOp-IASI

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