Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns
<jats:p>Abstract. In this paper, we exploit the first 10-year data record (2008–2017) of nitric acid (HNO3) total columns measured by the IASI-A/MetOp infrared sounder, characterized by an exceptional daily sampling and a good vertical sensitivity in the lower-to-mid stratosphere (around 50 hP...
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ftmit:oai:dspace.mit.edu:1721.1/148248 2023-06-11T04:06:15+02:00 Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns Wespes, Catherine Ronsmans, Gaetane Clarisse, Lieven Solomon, Susan Hurtmans, Daniel Clerbaux, Cathy Coheur, Pierre-François Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences 2023-02-28T17:55:14Z application/pdf https://hdl.handle.net/1721.1/148248 en eng Copernicus GmbH 10.5194/ACP-22-10993-2022 Atmospheric Chemistry and Physics https://hdl.handle.net/1721.1/148248 Wespes, Catherine, Ronsmans, Gaetane, Clarisse, Lieven, Solomon, Susan, Hurtmans, Daniel et al. 2022. "Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns." Atmospheric Chemistry and Physics, 22 (16). Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ Copernicus Publications Article http://purl.org/eprint/type/JournalArticle 2023 ftmit 2023-05-29T08:40:51Z <jats:p>Abstract. In this paper, we exploit the first 10-year data record (2008–2017) of nitric acid (HNO3) total columns measured by the IASI-A/MetOp infrared sounder, characterized by an exceptional daily sampling and a good vertical sensitivity in the lower-to-mid stratosphere (around 50 hPa), to monitor the relationship between the temperature decrease and the observed HNO3 loss that occurs each year in the Antarctic stratosphere during the polar night. Since the HNO3 depletion results from the formation of polar stratospheric clouds (PSCs), which trigger the development of the ozone (O3) hole, its continuous monitoring is of high importance. We verify here, from the 10-year time evolution of HNO3 together with temperature (taken from reanalysis at 50 hPa), the recurrence of specific regimes in the annual cycle of IASI HNO3 and identify (for each year) the day and the 50 hPa temperature (“drop temperature”) corresponding to the onset of strong HNO3 depletion in the Antarctic winter. Although the measured HNO3 total column does not allow for the uptake of HNO3 by different types of PSC particles along the vertical profile to be differentiated, an average drop temperature of 194.2 ± 3.8 K, close to the nitric acid trihydrate (NAT) existence threshold (∼ 195 K at 50 hPa), is found in the region of potential vorticity lower than −10 × 10−5 Km2kg-1s-1 (similar to the 70–90∘ S equivalent latitude region during winter). The spatial distribution and interannual variability of the drop temperature are investigated and discussed. This paper highlights the capability of the IASI sounder to monitor the evolution of polar stratospheric HNO3, a key player in the processes involved in the depletion of stratospheric O3. </jats:p> Article in Journal/Newspaper Antarc* Antarctic polar night DSpace@MIT (Massachusetts Institute of Technology) Antarctic The Antarctic |
institution |
Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
description |
<jats:p>Abstract. In this paper, we exploit the first 10-year data record (2008–2017) of nitric acid (HNO3) total columns measured by the IASI-A/MetOp infrared sounder, characterized by an exceptional daily sampling and a good vertical sensitivity in the lower-to-mid stratosphere (around 50 hPa), to monitor the relationship between the temperature decrease and the observed HNO3 loss that occurs each year in the Antarctic stratosphere during the polar night. Since the HNO3 depletion results from the formation of polar stratospheric clouds (PSCs), which trigger the development of the ozone (O3) hole, its continuous monitoring is of high importance. We verify here, from the 10-year time evolution of HNO3 together with temperature (taken from reanalysis at 50 hPa), the recurrence of specific regimes in the annual cycle of IASI HNO3 and identify (for each year) the day and the 50 hPa temperature (“drop temperature”) corresponding to the onset of strong HNO3 depletion in the Antarctic winter. Although the measured HNO3 total column does not allow for the uptake of HNO3 by different types of PSC particles along the vertical profile to be differentiated, an average drop temperature of 194.2 ± 3.8 K, close to the nitric acid trihydrate (NAT) existence threshold (∼ 195 K at 50 hPa), is found in the region of potential vorticity lower than −10 × 10−5 Km2kg-1s-1 (similar to the 70–90∘ S equivalent latitude region during winter). The spatial distribution and interannual variability of the drop temperature are investigated and discussed. This paper highlights the capability of the IASI sounder to monitor the evolution of polar stratospheric HNO3, a key player in the processes involved in the depletion of stratospheric O3. </jats:p> |
author2 |
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
format |
Article in Journal/Newspaper |
author |
Wespes, Catherine Ronsmans, Gaetane Clarisse, Lieven Solomon, Susan Hurtmans, Daniel Clerbaux, Cathy Coheur, Pierre-François |
spellingShingle |
Wespes, Catherine Ronsmans, Gaetane Clarisse, Lieven Solomon, Susan Hurtmans, Daniel Clerbaux, Cathy Coheur, Pierre-François Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns |
author_facet |
Wespes, Catherine Ronsmans, Gaetane Clarisse, Lieven Solomon, Susan Hurtmans, Daniel Clerbaux, Cathy Coheur, Pierre-François |
author_sort |
Wespes, Catherine |
title |
Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns |
title_short |
Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns |
title_full |
Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns |
title_fullStr |
Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns |
title_full_unstemmed |
Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns |
title_sort |
polar stratospheric nitric acid depletion surveyed from a decadal dataset of iasi total columns |
publisher |
Copernicus GmbH |
publishDate |
2023 |
url |
https://hdl.handle.net/1721.1/148248 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic polar night |
genre_facet |
Antarc* Antarctic polar night |
op_source |
Copernicus Publications |
op_relation |
10.5194/ACP-22-10993-2022 Atmospheric Chemistry and Physics https://hdl.handle.net/1721.1/148248 Wespes, Catherine, Ronsmans, Gaetane, Clarisse, Lieven, Solomon, Susan, Hurtmans, Daniel et al. 2022. "Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns." Atmospheric Chemistry and Physics, 22 (16). |
op_rights |
Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ |
_version_ |
1768378099785793536 |