Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion
An important source of polar stratospheric clouds (PSCs), which play a crucial role in controlling polar stratospheric ozone depletion, is the temperature fluctuations induced by mountain waves. These enable stratospheric temperatures to fall below the threshold value for PSC formation in regions of...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
European Geosciences Union
2020
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/528841/ https://nora.nerc.ac.uk/id/eprint/528841/1/acp-20-12483-2020.pdf https://acp.copernicus.org/articles/20/12483/2020/ |
id |
ftnerc:oai:nora.nerc.ac.uk:528841 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:528841 2023-05-15T13:41:45+02:00 Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion Orr, Andrew Hosking, J. Scott Delon, Aymeric Hoffman, Lars Spang, Reinhold Moffat-Griffin, Tracy Keeble, James Abraham, Nathan Luke Braesicke, Peter 2020-10-31 text http://nora.nerc.ac.uk/id/eprint/528841/ https://nora.nerc.ac.uk/id/eprint/528841/1/acp-20-12483-2020.pdf https://acp.copernicus.org/articles/20/12483/2020/ en eng European Geosciences Union https://nora.nerc.ac.uk/id/eprint/528841/1/acp-20-12483-2020.pdf Orr, Andrew orcid:0000-0001-5111-8402 Hosking, J. Scott orcid:0000-0002-3646-3504 Delon, Aymeric; Hoffman, Lars; Spang, Reinhold; Moffat-Griffin, Tracy orcid:0000-0002-9670-6715 Keeble, James; Abraham, Nathan Luke; Braesicke, Peter. 2020 Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion. Atmospheric Chemistry and Physics, 20 (21), 12483. 12483-12497. https://doi.org/10.5194/acp-20-12483-2020 <https://doi.org/10.5194/acp-20-12483-2020> cc_by_4 CC-BY Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.5194/acp-20-12483-2020 2023-02-04T19:51:18Z An important source of polar stratospheric clouds (PSCs), which play a crucial role in controlling polar stratospheric ozone depletion, is the temperature fluctuations induced by mountain waves. These enable stratospheric temperatures to fall below the threshold value for PSC formation in regions of negative temperature perturbations or cooling phases induced by the waves even if the synoptic-scale temperatures are too high. However, this formation mechanism is usually missing in global chemistry–climate models because these temperature fluctuations are neither resolved nor parameterised. Here, we investigate in detail the episodic and localised wintertime stratospheric cooling events produced over the Antarctic Peninsula by a parameterisation of mountain-wave-induced temperature fluctuations inserted into a 30-year run of the global chemistry–climate configuration of the UM-UKCA (Unified Model – United Kingdom Chemistry and Aerosol) model. Comparison of the probability distribution of the parameterised cooling phases with those derived from climatologies of satellite-derived AIRS brightness temperature measurements and high-resolution radiosonde temperature soundings from Rothera Research Station on the Antarctic Peninsula shows that they broadly agree with the AIRS observations and agree well with the radiosonde observations, particularly in both cases for the “cold tails” of the distributions. It is further shown that adding the parameterised cooling phase to the resolved and synoptic-scale temperatures in the UM-UKCA model results in a considerable increase in the number of instances when minimum temperatures fall below the formation temperature for PSCs made from ice water during late austral autumn and early austral winter and early austral spring, and without the additional cooling phase the temperature rarely falls below the ice frost point temperature above the Antarctic Peninsula in the model. Similarly, it was found that the formation potential for PSCs made from ice water was many times larger if the ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Austral Rothera ENVELOPE(-68.130,-68.130,-67.568,-67.568) Rothera Research Station ENVELOPE(-68.129,-68.129,-67.566,-67.566) Atmospheric Chemistry and Physics 20 21 12483 12497 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
An important source of polar stratospheric clouds (PSCs), which play a crucial role in controlling polar stratospheric ozone depletion, is the temperature fluctuations induced by mountain waves. These enable stratospheric temperatures to fall below the threshold value for PSC formation in regions of negative temperature perturbations or cooling phases induced by the waves even if the synoptic-scale temperatures are too high. However, this formation mechanism is usually missing in global chemistry–climate models because these temperature fluctuations are neither resolved nor parameterised. Here, we investigate in detail the episodic and localised wintertime stratospheric cooling events produced over the Antarctic Peninsula by a parameterisation of mountain-wave-induced temperature fluctuations inserted into a 30-year run of the global chemistry–climate configuration of the UM-UKCA (Unified Model – United Kingdom Chemistry and Aerosol) model. Comparison of the probability distribution of the parameterised cooling phases with those derived from climatologies of satellite-derived AIRS brightness temperature measurements and high-resolution radiosonde temperature soundings from Rothera Research Station on the Antarctic Peninsula shows that they broadly agree with the AIRS observations and agree well with the radiosonde observations, particularly in both cases for the “cold tails” of the distributions. It is further shown that adding the parameterised cooling phase to the resolved and synoptic-scale temperatures in the UM-UKCA model results in a considerable increase in the number of instances when minimum temperatures fall below the formation temperature for PSCs made from ice water during late austral autumn and early austral winter and early austral spring, and without the additional cooling phase the temperature rarely falls below the ice frost point temperature above the Antarctic Peninsula in the model. Similarly, it was found that the formation potential for PSCs made from ice water was many times larger if the ... |
format |
Article in Journal/Newspaper |
author |
Orr, Andrew Hosking, J. Scott Delon, Aymeric Hoffman, Lars Spang, Reinhold Moffat-Griffin, Tracy Keeble, James Abraham, Nathan Luke Braesicke, Peter |
spellingShingle |
Orr, Andrew Hosking, J. Scott Delon, Aymeric Hoffman, Lars Spang, Reinhold Moffat-Griffin, Tracy Keeble, James Abraham, Nathan Luke Braesicke, Peter Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion |
author_facet |
Orr, Andrew Hosking, J. Scott Delon, Aymeric Hoffman, Lars Spang, Reinhold Moffat-Griffin, Tracy Keeble, James Abraham, Nathan Luke Braesicke, Peter |
author_sort |
Orr, Andrew |
title |
Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion |
title_short |
Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion |
title_full |
Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion |
title_fullStr |
Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion |
title_full_unstemmed |
Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion |
title_sort |
polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: a missing piece in fully modelling polar stratospheric ozone depletion |
publisher |
European Geosciences Union |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/528841/ https://nora.nerc.ac.uk/id/eprint/528841/1/acp-20-12483-2020.pdf https://acp.copernicus.org/articles/20/12483/2020/ |
long_lat |
ENVELOPE(-68.130,-68.130,-67.568,-67.568) ENVELOPE(-68.129,-68.129,-67.566,-67.566) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Austral Rothera Rothera Research Station |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Austral Rothera Rothera Research Station |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
https://nora.nerc.ac.uk/id/eprint/528841/1/acp-20-12483-2020.pdf Orr, Andrew orcid:0000-0001-5111-8402 Hosking, J. Scott orcid:0000-0002-3646-3504 Delon, Aymeric; Hoffman, Lars; Spang, Reinhold; Moffat-Griffin, Tracy orcid:0000-0002-9670-6715 Keeble, James; Abraham, Nathan Luke; Braesicke, Peter. 2020 Polar stratospheric clouds initiated by mountain waves in a global chemistry-climate model: A missing piece in fully modelling polar stratospheric ozone depletion. Atmospheric Chemistry and Physics, 20 (21), 12483. 12483-12497. https://doi.org/10.5194/acp-20-12483-2020 <https://doi.org/10.5194/acp-20-12483-2020> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-20-12483-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
21 |
container_start_page |
12483 |
op_container_end_page |
12497 |
_version_ |
1766157121602191360 |