Temperature of Polar Stratospheric Clouds formation in the Arctic and Antarctic
Polar Stratospheric Clouds (PSCs) induce a remarkable reddenings of the sky at twilight. Such reddening has been observed regularly by the SAOZ UV-visible spectrometers operating in polar regions in Dumont d'Urville in Antarctica and Sodankyla in Finland. The PSC detection is based on a Color I...
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ftinsu:oai:HAL:hal-00732464v1 2023-06-18T03:36:48+02:00 Temperature of Polar Stratospheric Clouds formation in the Arctic and Antarctic Pommereau, Jean-Pierre Goutail, Florence Pazmino, Andrea Garnier, Anne Jumelet, Julien Kivi, Rigel STRATO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Science Systems and Applications, Inc. Hampton (SSAI) Finnish Meteorological Institute (FMI) Toronto, Canada 2012-08-27 https://hal.science/hal-00732464 en eng HAL CCSD hal-00732464 https://hal.science/hal-00732464 Quadrennial Ozone Symposium https://hal.science/hal-00732464 Quadrennial Ozone Symposium, Aug 2012, Toronto, Canada [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/conferenceObject Conference papers 2012 ftinsu 2023-06-05T18:59:24Z Polar Stratospheric Clouds (PSCs) induce a remarkable reddenings of the sky at twilight. Such reddening has been observed regularly by the SAOZ UV-visible spectrometers operating in polar regions in Dumont d'Urville in Antarctica and Sodankyla in Finland. The PSC detection is based on a Color Index (CI) derived from the ratio of sunlight scattered at zenith at 550 to 350 nm. The cloud altitude is retrieved from the SZA (Sun Zenith Angle) of maximum CI, after calibration by comparison with PSCs altitude observed by the CALIPSO lidar in orbit since 2006, a ground-based lidar in Dumont d'Urville and backscatter sondes balloon flights in Sodankyla. The temperature threshold at which PSCs can form is then investigated using the ECMWF model at the cloud level. Shown will be the statistics based on more than 20 years of observations in Sodankyla in Finland and in Dumont d'Urville in Antarctica. The PSC threshold temperature is found to be lower by about 5K in the Antarctic than in the Arctic, which is consistent with the expected stronger de-nitrification and dehydration of the southern winter vortex compared to the northern. Conference Object Antarc* Antarctic Antarctica Arctic Institut national des sciences de l'Univers: HAL-INSU Antarctic Arctic Canada Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) The Antarctic |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Pommereau, Jean-Pierre Goutail, Florence Pazmino, Andrea Garnier, Anne Jumelet, Julien Kivi, Rigel Temperature of Polar Stratospheric Clouds formation in the Arctic and Antarctic |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
Polar Stratospheric Clouds (PSCs) induce a remarkable reddenings of the sky at twilight. Such reddening has been observed regularly by the SAOZ UV-visible spectrometers operating in polar regions in Dumont d'Urville in Antarctica and Sodankyla in Finland. The PSC detection is based on a Color Index (CI) derived from the ratio of sunlight scattered at zenith at 550 to 350 nm. The cloud altitude is retrieved from the SZA (Sun Zenith Angle) of maximum CI, after calibration by comparison with PSCs altitude observed by the CALIPSO lidar in orbit since 2006, a ground-based lidar in Dumont d'Urville and backscatter sondes balloon flights in Sodankyla. The temperature threshold at which PSCs can form is then investigated using the ECMWF model at the cloud level. Shown will be the statistics based on more than 20 years of observations in Sodankyla in Finland and in Dumont d'Urville in Antarctica. The PSC threshold temperature is found to be lower by about 5K in the Antarctic than in the Arctic, which is consistent with the expected stronger de-nitrification and dehydration of the southern winter vortex compared to the northern. |
author2 |
STRATO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Science Systems and Applications, Inc. Hampton (SSAI) Finnish Meteorological Institute (FMI) |
format |
Conference Object |
author |
Pommereau, Jean-Pierre Goutail, Florence Pazmino, Andrea Garnier, Anne Jumelet, Julien Kivi, Rigel |
author_facet |
Pommereau, Jean-Pierre Goutail, Florence Pazmino, Andrea Garnier, Anne Jumelet, Julien Kivi, Rigel |
author_sort |
Pommereau, Jean-Pierre |
title |
Temperature of Polar Stratospheric Clouds formation in the Arctic and Antarctic |
title_short |
Temperature of Polar Stratospheric Clouds formation in the Arctic and Antarctic |
title_full |
Temperature of Polar Stratospheric Clouds formation in the Arctic and Antarctic |
title_fullStr |
Temperature of Polar Stratospheric Clouds formation in the Arctic and Antarctic |
title_full_unstemmed |
Temperature of Polar Stratospheric Clouds formation in the Arctic and Antarctic |
title_sort |
temperature of polar stratospheric clouds formation in the arctic and antarctic |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00732464 |
op_coverage |
Toronto, Canada |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) |
geographic |
Antarctic Arctic Canada Dumont d'Urville Dumont-d'Urville The Antarctic |
geographic_facet |
Antarctic Arctic Canada Dumont d'Urville Dumont-d'Urville The Antarctic |
genre |
Antarc* Antarctic Antarctica Arctic |
genre_facet |
Antarc* Antarctic Antarctica Arctic |
op_source |
Quadrennial Ozone Symposium https://hal.science/hal-00732464 Quadrennial Ozone Symposium, Aug 2012, Toronto, Canada |
op_relation |
hal-00732464 https://hal.science/hal-00732464 |
_version_ |
1769008313103548416 |