Antarctic air over New Zealand following vortex breakdown in 1998
An ozonesonde profile over the Network for Detection of Stratospheric Change (NDSC) site at Lauder (45.0° S, 169.7° E), New Zealand, for 24 December 1998 showed atypically low ozone centered around 24 km altitude (600 K potential temperature). The origin of the anomaly is explained using reverse dom...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , , , , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/angeo-21-2175-2003 https://angeo.copernicus.org/articles/21/2175/2003/ |
id |
ftcopernicus:oai:publications.copernicus.org:angeo35059 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:angeo35059 2023-05-15T13:36:36+02:00 Antarctic air over New Zealand following vortex breakdown in 1998 Ajtic, J. Connor, B. J. Randall, C. E. Lawrence, B. N. Bodeker, G. E. Rosenfield, J. E. Heuff, D. N. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-21-2175-2003 https://angeo.copernicus.org/articles/21/2175/2003/ eng eng doi:10.5194/angeo-21-2175-2003 https://angeo.copernicus.org/articles/21/2175/2003/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-21-2175-2003 2020-07-20T16:27:40Z An ozonesonde profile over the Network for Detection of Stratospheric Change (NDSC) site at Lauder (45.0° S, 169.7° E), New Zealand, for 24 December 1998 showed atypically low ozone centered around 24 km altitude (600 K potential temperature). The origin of the anomaly is explained using reverse domain filling (RDF) calculations combined with a PV/O 3 fitting technique applied to ozone measurements from the Polar Ozone and Aerosol Measurement (POAM) III instrument. The RDF calculations for two isentropic surfaces, 550 and 600 K, show that ozone-poor air from the Antarctic polar vortex reached New Zealand on 24–26 December 1998. The vortex air on the 550 K isentrope originated in the ozone hole region, unlike the air on 600 K where low ozone values were caused by dynamical effects. High-resolution ozone maps were generated, and their examination shows that a vortex remnant situated above New Zealand was the cause of the altered ozone profile on 24 December. The maps also illustrate mixing of the vortex filaments into southern midlatitudes, whereby the overall mid-latitude ozone levels were decreased. Key words. Atmospheric composition and structure (middle atmosphere composition and chemistry) – Meteorology and atmospheric dynamics (middle atmosphere dynamics) Text Antarc* Antarctic Copernicus Publications: E-Journals Antarctic New Zealand The Antarctic Annales Geophysicae 21 11 2175 2183 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
An ozonesonde profile over the Network for Detection of Stratospheric Change (NDSC) site at Lauder (45.0° S, 169.7° E), New Zealand, for 24 December 1998 showed atypically low ozone centered around 24 km altitude (600 K potential temperature). The origin of the anomaly is explained using reverse domain filling (RDF) calculations combined with a PV/O 3 fitting technique applied to ozone measurements from the Polar Ozone and Aerosol Measurement (POAM) III instrument. The RDF calculations for two isentropic surfaces, 550 and 600 K, show that ozone-poor air from the Antarctic polar vortex reached New Zealand on 24–26 December 1998. The vortex air on the 550 K isentrope originated in the ozone hole region, unlike the air on 600 K where low ozone values were caused by dynamical effects. High-resolution ozone maps were generated, and their examination shows that a vortex remnant situated above New Zealand was the cause of the altered ozone profile on 24 December. The maps also illustrate mixing of the vortex filaments into southern midlatitudes, whereby the overall mid-latitude ozone levels were decreased. Key words. Atmospheric composition and structure (middle atmosphere composition and chemistry) – Meteorology and atmospheric dynamics (middle atmosphere dynamics) |
format |
Text |
author |
Ajtic, J. Connor, B. J. Randall, C. E. Lawrence, B. N. Bodeker, G. E. Rosenfield, J. E. Heuff, D. N. |
spellingShingle |
Ajtic, J. Connor, B. J. Randall, C. E. Lawrence, B. N. Bodeker, G. E. Rosenfield, J. E. Heuff, D. N. Antarctic air over New Zealand following vortex breakdown in 1998 |
author_facet |
Ajtic, J. Connor, B. J. Randall, C. E. Lawrence, B. N. Bodeker, G. E. Rosenfield, J. E. Heuff, D. N. |
author_sort |
Ajtic, J. |
title |
Antarctic air over New Zealand following vortex breakdown in 1998 |
title_short |
Antarctic air over New Zealand following vortex breakdown in 1998 |
title_full |
Antarctic air over New Zealand following vortex breakdown in 1998 |
title_fullStr |
Antarctic air over New Zealand following vortex breakdown in 1998 |
title_full_unstemmed |
Antarctic air over New Zealand following vortex breakdown in 1998 |
title_sort |
antarctic air over new zealand following vortex breakdown in 1998 |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-21-2175-2003 https://angeo.copernicus.org/articles/21/2175/2003/ |
geographic |
Antarctic New Zealand The Antarctic |
geographic_facet |
Antarctic New Zealand The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-21-2175-2003 https://angeo.copernicus.org/articles/21/2175/2003/ |
op_doi |
https://doi.org/10.5194/angeo-21-2175-2003 |
container_title |
Annales Geophysicae |
container_volume |
21 |
container_issue |
11 |
container_start_page |
2175 |
op_container_end_page |
2183 |
_version_ |
1766081608028258304 |