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Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data

The variability and trend of ozone (O(3)) in the Upper troposphere and Lower Stratosphere (UTLS) over the Asian region needs to be accurately quantified. Ozone in the UTLS radiatively heats this region and cools the upper parts of the stratosphere. This results in an impact on relative humidity, sta...

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Autores principales: Fadnavis, Suvarna, Sagalgile, Archana, Sonbawne, Sunil, Vogel, Bärbel, Peter, Thomas, Wienhold, Frank G., Dirksen, Ruud, Oelsner, Peter, Naja, Manish, Müller, Rolf
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10154380/
https://www.ncbi.nlm.nih.gov/pubmed/37130920
http://dx.doi.org/10.1038/s41598-023-34330-5
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author Fadnavis, Suvarna
Sagalgile, Archana
Sonbawne, Sunil
Vogel, Bärbel
Peter, Thomas
Wienhold, Frank G.
Dirksen, Ruud
Oelsner, Peter
Naja, Manish
Müller, Rolf
author_facet Fadnavis, Suvarna
Sagalgile, Archana
Sonbawne, Sunil
Vogel, Bärbel
Peter, Thomas
Wienhold, Frank G.
Dirksen, Ruud
Oelsner, Peter
Naja, Manish
Müller, Rolf
author_sort Fadnavis, Suvarna
collection PubMed
description The variability and trend of ozone (O(3)) in the Upper troposphere and Lower Stratosphere (UTLS) over the Asian region needs to be accurately quantified. Ozone in the UTLS radiatively heats this region and cools the upper parts of the stratosphere. This results in an impact on relative humidity, static stability in the UTLS region and tropical tropopause temperature. A major challenge for understanding ozone chemistry in the UTLS is sparse observations and thus the representation of precursor gases in model emission inventories. Here, we evaluate ozonesonde measurements during August 2016 at Nainital, in the Himalayas, against ozone from multiple reanalyses and the ECHAM6-HAMMOZ model. We find that compared to measurements both reanalyses and ECHAM6-HAMMOZ control simulation overestimate ozone mixing ratios in the troposphere (20 ppb) and in the UTLS (55 ppb). We performed sensitivity simulations using the ECHAM6-HAMMOZ model for a 50% reduction in the emission of (1) NOx and (2) VOCs. The model simulations with NO(X) reduction agree better with the ozonesonde observations in the lower troposphere and in the UTLS. Thus, neither reanalyses nor ECHAM6-HAMMOZ results can reproduce observed O(3) over the South Asian region. For a better representation of O(3) in the ECHAM6-HAMMOZ model, NO(X) emission should be reduced by 50% in the emission inventory. A larger number of observations of ozone and precursor gases over the South Asian region would improve the assessment of ozone chemistry in models.
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spelling pubmed-101543802023-05-04 Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data Fadnavis, Suvarna Sagalgile, Archana Sonbawne, Sunil Vogel, Bärbel Peter, Thomas Wienhold, Frank G. Dirksen, Ruud Oelsner, Peter Naja, Manish Müller, Rolf Sci Rep Article The variability and trend of ozone (O(3)) in the Upper troposphere and Lower Stratosphere (UTLS) over the Asian region needs to be accurately quantified. Ozone in the UTLS radiatively heats this region and cools the upper parts of the stratosphere. This results in an impact on relative humidity, static stability in the UTLS region and tropical tropopause temperature. A major challenge for understanding ozone chemistry in the UTLS is sparse observations and thus the representation of precursor gases in model emission inventories. Here, we evaluate ozonesonde measurements during August 2016 at Nainital, in the Himalayas, against ozone from multiple reanalyses and the ECHAM6-HAMMOZ model. We find that compared to measurements both reanalyses and ECHAM6-HAMMOZ control simulation overestimate ozone mixing ratios in the troposphere (20 ppb) and in the UTLS (55 ppb). We performed sensitivity simulations using the ECHAM6-HAMMOZ model for a 50% reduction in the emission of (1) NOx and (2) VOCs. The model simulations with NO(X) reduction agree better with the ozonesonde observations in the lower troposphere and in the UTLS. Thus, neither reanalyses nor ECHAM6-HAMMOZ results can reproduce observed O(3) over the South Asian region. For a better representation of O(3) in the ECHAM6-HAMMOZ model, NO(X) emission should be reduced by 50% in the emission inventory. A larger number of observations of ozone and precursor gases over the South Asian region would improve the assessment of ozone chemistry in models. Nature Publishing Group UK 2023-05-02 /pmc/articles/PMC10154380/ /pubmed/37130920 http://dx.doi.org/10.1038/s41598-023-34330-5 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Fadnavis, Suvarna
Sagalgile, Archana
Sonbawne, Sunil
Vogel, Bärbel
Peter, Thomas
Wienhold, Frank G.
Dirksen, Ruud
Oelsner, Peter
Naja, Manish
Müller, Rolf
Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data
title Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data
title_full Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data
title_fullStr Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data
title_full_unstemmed Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data
title_short Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data
title_sort comparison of ozonesonde measurements in the upper troposphere and lower stratosphere in northern india with reanalysis and chemistry-climate-model data
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10154380/
https://www.ncbi.nlm.nih.gov/pubmed/37130920
http://dx.doi.org/10.1038/s41598-023-34330-5
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