Influence of the optically-active turbulence on astronomical seeing at Concordia station - Dome C, Antarctica
International audience The study of the distorting action of the atmospheric turbulence is important to understand the reason of the astronomical seeing variability, and to propose reliable methods to estimate the seeing quality. The influence of the atmospheric surface layer thermal turbulence on d...
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ftunivcotedazur:oai:HAL:hal-02478963v1 2023-10-09T21:46:31+02:00 Influence of the optically-active turbulence on astronomical seeing at Concordia station - Dome C, Antarctica Petenko, Igor Aristidi, Eric Agabi, Karim Bouchez, Guillaume Bondoux, Erick Pietroni, Ilaria Argentini, Stefania Viola, Angelo Casasanta, Giampietro Mastrantonio, Giangiuseppe Joseph Louis LAGRANGE (LAGRANGE) Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS) Groupe d'Etude de la Matière Condensée (GEMAC) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS) Observatoire de la Côte d'Azur (OCA) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Istituto di Scienze dell'Atmosfera e del Clima (ISAC) National Research Council of Italy Vienne, Austria 2013-06 https://hal.science/hal-02478963 en eng HAL CCSD hal-02478963 https://hal.science/hal-02478963 BIBCODE: 2013EGUGA.15.9528P EGU General Assembly https://hal.science/hal-02478963 EGU General Assembly, Jun 2013, Vienne, Austria [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/conferenceObject Conference papers 2013 ftunivcotedazur 2023-09-12T23:23:58Z International audience The study of the distorting action of the atmospheric turbulence is important to understand the reason of the astronomical seeing variability, and to propose reliable methods to estimate the seeing quality. The influence of the atmospheric surface layer thermal turbulence on distortion of astronomical images is investigated. During a campaign carried out at Concordia station at Dome C, East Antarctica in winter 2012, an experiment was carried out to determine the behaviour and the contribution of the optically-active atmospheric turbulence in the lowest tens meters. The surface layer in the interior of Antarctica during winter is extremely stably stratified with the difference of temperature between the surface and the top of the inversion reaching 30-40 °C. Direct optical measurements of the seeing made by differential image motion monitors (DIMM) at two levels, 8 and 20 m, were made simultaneously with turbulence observations in the near-surface atmospheric layer. The intensity of the thermal turbulence was detected and evaluated using both a specially designed high-resolution sodar, and sonic anemometer measurements. The statistics of some meteorological variables, including long-wave downwelling radiation, characterising the presence of cloudiness are obtained. Typical patterns of the turbulence shown by sodargrams are analysed and classified. The statistics of the heights of the surface-based turbulent layer and of the seeing quality values are presented. A correlation exists between the seeing quality and the intensity of turbulence measured by sodar. Statistics of turbulent optical factor (TOF) for different layers within the surface layer are analysed for the total period and for clear sky conditions to give recommendations on how to choose an optimal height for the installation of the astronomical instrumentation. Conference Object Antarc* Antarctica East Antarctica HAL Université Côte d'Azur Concordia Station ENVELOPE(123.333,123.333,-75.100,-75.100) East Antarctica |
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HAL Université Côte d'Azur |
op_collection_id |
ftunivcotedazur |
language |
English |
topic |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Petenko, Igor Aristidi, Eric Agabi, Karim Bouchez, Guillaume Bondoux, Erick Pietroni, Ilaria Argentini, Stefania Viola, Angelo Casasanta, Giampietro Mastrantonio, Giangiuseppe Influence of the optically-active turbulence on astronomical seeing at Concordia station - Dome C, Antarctica |
topic_facet |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
description |
International audience The study of the distorting action of the atmospheric turbulence is important to understand the reason of the astronomical seeing variability, and to propose reliable methods to estimate the seeing quality. The influence of the atmospheric surface layer thermal turbulence on distortion of astronomical images is investigated. During a campaign carried out at Concordia station at Dome C, East Antarctica in winter 2012, an experiment was carried out to determine the behaviour and the contribution of the optically-active atmospheric turbulence in the lowest tens meters. The surface layer in the interior of Antarctica during winter is extremely stably stratified with the difference of temperature between the surface and the top of the inversion reaching 30-40 °C. Direct optical measurements of the seeing made by differential image motion monitors (DIMM) at two levels, 8 and 20 m, were made simultaneously with turbulence observations in the near-surface atmospheric layer. The intensity of the thermal turbulence was detected and evaluated using both a specially designed high-resolution sodar, and sonic anemometer measurements. The statistics of some meteorological variables, including long-wave downwelling radiation, characterising the presence of cloudiness are obtained. Typical patterns of the turbulence shown by sodargrams are analysed and classified. The statistics of the heights of the surface-based turbulent layer and of the seeing quality values are presented. A correlation exists between the seeing quality and the intensity of turbulence measured by sodar. Statistics of turbulent optical factor (TOF) for different layers within the surface layer are analysed for the total period and for clear sky conditions to give recommendations on how to choose an optimal height for the installation of the astronomical instrumentation. |
author2 |
Joseph Louis LAGRANGE (LAGRANGE) Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS) Groupe d'Etude de la Matière Condensée (GEMAC) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS) Observatoire de la Côte d'Azur (OCA) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Istituto di Scienze dell'Atmosfera e del Clima (ISAC) National Research Council of Italy |
format |
Conference Object |
author |
Petenko, Igor Aristidi, Eric Agabi, Karim Bouchez, Guillaume Bondoux, Erick Pietroni, Ilaria Argentini, Stefania Viola, Angelo Casasanta, Giampietro Mastrantonio, Giangiuseppe |
author_facet |
Petenko, Igor Aristidi, Eric Agabi, Karim Bouchez, Guillaume Bondoux, Erick Pietroni, Ilaria Argentini, Stefania Viola, Angelo Casasanta, Giampietro Mastrantonio, Giangiuseppe |
author_sort |
Petenko, Igor |
title |
Influence of the optically-active turbulence on astronomical seeing at Concordia station - Dome C, Antarctica |
title_short |
Influence of the optically-active turbulence on astronomical seeing at Concordia station - Dome C, Antarctica |
title_full |
Influence of the optically-active turbulence on astronomical seeing at Concordia station - Dome C, Antarctica |
title_fullStr |
Influence of the optically-active turbulence on astronomical seeing at Concordia station - Dome C, Antarctica |
title_full_unstemmed |
Influence of the optically-active turbulence on astronomical seeing at Concordia station - Dome C, Antarctica |
title_sort |
influence of the optically-active turbulence on astronomical seeing at concordia station - dome c, antarctica |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-02478963 |
op_coverage |
Vienne, Austria |
long_lat |
ENVELOPE(123.333,123.333,-75.100,-75.100) |
geographic |
Concordia Station East Antarctica |
geographic_facet |
Concordia Station East Antarctica |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
EGU General Assembly https://hal.science/hal-02478963 EGU General Assembly, Jun 2013, Vienne, Austria |
op_relation |
hal-02478963 https://hal.science/hal-02478963 BIBCODE: 2013EGUGA.15.9528P |
_version_ |
1779322225113956352 |