Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund (79° N, 12° E) and McMurdo (78° S, 167° E)
International audience The extent of springtime Arctic ozone loss does not reach Antarctic "ozone hole" dimensions because of the generally higher temperatures in the northern hemisphere vortex and consequent less polar stratospheric cloud (PSC) particle surface for heterogeneous chlorine...
Main Authors: | , , , , , , |
---|---|
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2004
|
Subjects: | |
Online Access: | https://hal.science/hal-00301481 https://hal.science/hal-00301481/document https://hal.science/hal-00301481/file/acpd-4-6837-2004.pdf |
id |
ftinsu:oai:HAL:hal-00301481v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-00301481v1 2024-02-11T09:58:03+01:00 Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund (79° N, 12° E) and McMurdo (78° S, 167° E) Müller, M. Neuber, R. Massoli, P. Cairo, F. Adriani, A. Moriconi, M. L. Di Donfrancesco, G. Department of Bentho-pelagic processes Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association CNR Institute of Atmospheric Sciences and Climate (ISAC) National Research Council of Italy Italian National Agency for New Technologies Energy and Environment 2004-10-26 https://hal.science/hal-00301481 https://hal.science/hal-00301481/document https://hal.science/hal-00301481/file/acpd-4-6837-2004.pdf en eng HAL CCSD European Geosciences Union hal-00301481 https://hal.science/hal-00301481 https://hal.science/hal-00301481/document https://hal.science/hal-00301481/file/acpd-4-6837-2004.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301481 Atmospheric Chemistry and Physics Discussions, 2004, 4 (5), pp.6837-6866 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2004 ftinsu 2024-01-17T17:27:19Z International audience The extent of springtime Arctic ozone loss does not reach Antarctic "ozone hole" dimensions because of the generally higher temperatures in the northern hemisphere vortex and consequent less polar stratospheric cloud (PSC) particle surface for heterogeneous chlorine activation. Yet, with increasing greenhouse gases stratospheric temperatures are expected to further decrease. To infer if present Antarctic PSC occurrence can be applied to predict future Arctic PSC occurrence, lidar observations from McMurdo station (78° S, 167° E) and Ny-Ålesund (79° N, 12° E) have been analysed for the 9 winters between 1995 (1995/1996) and 2003 (2003/2004). Although the statistics may not completely cover the overall hemispheric PSC occurrence, the observations are considered to represent the main synoptic cloud features as both stations are mostly situated in the centre or at the inner edge of the vortex. Since the focus is set on the occurrence frequency of solid and liquid particles, the analysis has been restricted to volcanic aerosol free conditions. In McMurdo, by far the largest part of PSC observations is associated with PSC type Ia. The observed constant background of NAT particles and their potential ability to cause denoxification and irreversible denitrification is presumably more important to Antarctic ozone chemistry than the scarcely observed PSC type II. Meanwhile in Ny-Ålesund, PSC type II has never been observed, while type Ia and Ib both occur in large fraction. Although they are also found solely, the majority of observations reveals solid and liquid particle layers in the same profile. For the Ny-Ålesund measurements, the frequent occurrence of liquid PSC particles yields major significance in terms of ozone chemistry, as their chlorine activation rates are more efficient. The relationship between temperature, PSC formation, and denitrification is nonlinear and the McMurdo and Ny-Ålesund PSC observations imply that for predicted stratospheric cooling it is not possible to directly ... Article in Journal/Newspaper Antarc* Antarctic Arctic Ny Ålesund Ny-Ålesund Institut national des sciences de l'Univers: HAL-INSU Arctic Antarctic Ny-Ålesund McMurdo Station ENVELOPE(166.667,166.667,-77.850,-77.850) |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Müller, M. Neuber, R. Massoli, P. Cairo, F. Adriani, A. Moriconi, M. L. Di Donfrancesco, G. Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund (79° N, 12° E) and McMurdo (78° S, 167° E) |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The extent of springtime Arctic ozone loss does not reach Antarctic "ozone hole" dimensions because of the generally higher temperatures in the northern hemisphere vortex and consequent less polar stratospheric cloud (PSC) particle surface for heterogeneous chlorine activation. Yet, with increasing greenhouse gases stratospheric temperatures are expected to further decrease. To infer if present Antarctic PSC occurrence can be applied to predict future Arctic PSC occurrence, lidar observations from McMurdo station (78° S, 167° E) and Ny-Ålesund (79° N, 12° E) have been analysed for the 9 winters between 1995 (1995/1996) and 2003 (2003/2004). Although the statistics may not completely cover the overall hemispheric PSC occurrence, the observations are considered to represent the main synoptic cloud features as both stations are mostly situated in the centre or at the inner edge of the vortex. Since the focus is set on the occurrence frequency of solid and liquid particles, the analysis has been restricted to volcanic aerosol free conditions. In McMurdo, by far the largest part of PSC observations is associated with PSC type Ia. The observed constant background of NAT particles and their potential ability to cause denoxification and irreversible denitrification is presumably more important to Antarctic ozone chemistry than the scarcely observed PSC type II. Meanwhile in Ny-Ålesund, PSC type II has never been observed, while type Ia and Ib both occur in large fraction. Although they are also found solely, the majority of observations reveals solid and liquid particle layers in the same profile. For the Ny-Ålesund measurements, the frequent occurrence of liquid PSC particles yields major significance in terms of ozone chemistry, as their chlorine activation rates are more efficient. The relationship between temperature, PSC formation, and denitrification is nonlinear and the McMurdo and Ny-Ålesund PSC observations imply that for predicted stratospheric cooling it is not possible to directly ... |
author2 |
Department of Bentho-pelagic processes Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association CNR Institute of Atmospheric Sciences and Climate (ISAC) National Research Council of Italy Italian National Agency for New Technologies Energy and Environment |
format |
Article in Journal/Newspaper |
author |
Müller, M. Neuber, R. Massoli, P. Cairo, F. Adriani, A. Moriconi, M. L. Di Donfrancesco, G. |
author_facet |
Müller, M. Neuber, R. Massoli, P. Cairo, F. Adriani, A. Moriconi, M. L. Di Donfrancesco, G. |
author_sort |
Müller, M. |
title |
Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund (79° N, 12° E) and McMurdo (78° S, 167° E) |
title_short |
Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund (79° N, 12° E) and McMurdo (78° S, 167° E) |
title_full |
Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund (79° N, 12° E) and McMurdo (78° S, 167° E) |
title_fullStr |
Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund (79° N, 12° E) and McMurdo (78° S, 167° E) |
title_full_unstemmed |
Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund (79° N, 12° E) and McMurdo (78° S, 167° E) |
title_sort |
differences in arctic and antarctic psc occurrence as observed by lidar in ny-ålesund (79° n, 12° e) and mcmurdo (78° s, 167° e) |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00301481 https://hal.science/hal-00301481/document https://hal.science/hal-00301481/file/acpd-4-6837-2004.pdf |
long_lat |
ENVELOPE(166.667,166.667,-77.850,-77.850) |
geographic |
Arctic Antarctic Ny-Ålesund McMurdo Station |
geographic_facet |
Arctic Antarctic Ny-Ålesund McMurdo Station |
genre |
Antarc* Antarctic Arctic Ny Ålesund Ny-Ålesund |
genre_facet |
Antarc* Antarctic Arctic Ny Ålesund Ny-Ålesund |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301481 Atmospheric Chemistry and Physics Discussions, 2004, 4 (5), pp.6837-6866 |
op_relation |
hal-00301481 https://hal.science/hal-00301481 https://hal.science/hal-00301481/document https://hal.science/hal-00301481/file/acpd-4-6837-2004.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1790593620833730560 |