Titan's South Pole Temporal Evolution of HC3N and other trace gases
International audience Up until mid 2012, Titan's Northern atmosphere exhibited the enriched chemical compounds found at the time of Northern Spring Equinox (NSE) since the Voyager days (November 1980), with a peak around the NSE in 2009. Since then, a reversal in the abundances of some species...
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ftobservparis:oai:HAL:hal-03734196v1 2024-05-19T07:48:38+00:00 Titan's South Pole Temporal Evolution of HC3N and other trace gases Coustenis, Athéna Nixon, Conor A. Jennings, Donald E. Bampasidis, Georgios Achterberg, Richard K. Lavvas, P. Teanby, Nicholas A. Bjoraker, Gordon L. Flasar, Michael Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) Pôle Planétologie du LESIA Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) NASA Goddard Space Flight Center (GSFC) National and Kapodistrian University of Athens (NKUA) Groupe de spectrométrie moléculaire et atmosphérique (GSMA) Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS) University of Bristol Bristol Tucson, AZ, United States 2014-11-09 https://hal.science/hal-03734196 en eng HAL CCSD hal-03734196 https://hal.science/hal-03734196 BIBCODE: 2014DPS.4610206C Bulletin of the American Astronomical Society AAS/Division for Planetary Sciences Meeting #46 https://hal.science/hal-03734196 AAS/Division for Planetary Sciences Meeting #46, Nov 2014, Tucson, AZ, United States [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/conferenceObject Conference papers 2014 ftobservparis 2024-04-25T01:18:02Z International audience Up until mid 2012, Titan's Northern atmosphere exhibited the enriched chemical compounds found at the time of Northern Spring Equinox (NSE) since the Voyager days (November 1980), with a peak around the NSE in 2009. Since then, a reversal in the abundances of some species from north to south has been observed with the appearance for the first time at Titan's south pole of some species such as HC3N at 663 cm-1 and C6H6 in large quantities. These species had previously been clearly observed only at high northern latitudes. Though not present in the south until February 2012, the 663 cm-1 emission appeared in CIRS spectra recorded on 24 July 2012 next to the CO2 band at 667 cm-1 and has been increasing since then. This is another strong indication of the buildup of the gaseous inventory in the southern stratosphere, as expected as the pole moves deeper into winter shadow. Downwelling nitrile gases that accumulate in the absence of ultraviolet sunlight, evidently increased quickly during 2012 and may be responsible also for the reported haze decrease in the north and its appearance in the south from its 220 cm-1 feature (Jennings et al. 2012a,b). HC3N has increased by 2 orders of magnitude in the south over the past 2 years, while decreasing rapidly in the north. We find other interesting although weaker transitions from north to south for molecules including HCN, C3H4 and C4H2, which need to be monitored more in the future.ReferencesJennings, D. E., et al. 2012a, ApJ, 754, L3Jennings, D. E., et al. 2012b, ApJ 761, L15 Conference Object South pole Archive de l'Observatoire de Paris (HAL) |
institution |
Open Polar |
collection |
Archive de l'Observatoire de Paris (HAL) |
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ftobservparis |
language |
English |
topic |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Coustenis, Athéna Nixon, Conor A. Jennings, Donald E. Bampasidis, Georgios Achterberg, Richard K. Lavvas, P. Teanby, Nicholas A. Bjoraker, Gordon L. Flasar, Michael Titan's South Pole Temporal Evolution of HC3N and other trace gases |
topic_facet |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
description |
International audience Up until mid 2012, Titan's Northern atmosphere exhibited the enriched chemical compounds found at the time of Northern Spring Equinox (NSE) since the Voyager days (November 1980), with a peak around the NSE in 2009. Since then, a reversal in the abundances of some species from north to south has been observed with the appearance for the first time at Titan's south pole of some species such as HC3N at 663 cm-1 and C6H6 in large quantities. These species had previously been clearly observed only at high northern latitudes. Though not present in the south until February 2012, the 663 cm-1 emission appeared in CIRS spectra recorded on 24 July 2012 next to the CO2 band at 667 cm-1 and has been increasing since then. This is another strong indication of the buildup of the gaseous inventory in the southern stratosphere, as expected as the pole moves deeper into winter shadow. Downwelling nitrile gases that accumulate in the absence of ultraviolet sunlight, evidently increased quickly during 2012 and may be responsible also for the reported haze decrease in the north and its appearance in the south from its 220 cm-1 feature (Jennings et al. 2012a,b). HC3N has increased by 2 orders of magnitude in the south over the past 2 years, while decreasing rapidly in the north. We find other interesting although weaker transitions from north to south for molecules including HCN, C3H4 and C4H2, which need to be monitored more in the future.ReferencesJennings, D. E., et al. 2012a, ApJ, 754, L3Jennings, D. E., et al. 2012b, ApJ 761, L15 |
author2 |
Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) Pôle Planétologie du LESIA Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) NASA Goddard Space Flight Center (GSFC) National and Kapodistrian University of Athens (NKUA) Groupe de spectrométrie moléculaire et atmosphérique (GSMA) Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS) University of Bristol Bristol |
format |
Conference Object |
author |
Coustenis, Athéna Nixon, Conor A. Jennings, Donald E. Bampasidis, Georgios Achterberg, Richard K. Lavvas, P. Teanby, Nicholas A. Bjoraker, Gordon L. Flasar, Michael |
author_facet |
Coustenis, Athéna Nixon, Conor A. Jennings, Donald E. Bampasidis, Georgios Achterberg, Richard K. Lavvas, P. Teanby, Nicholas A. Bjoraker, Gordon L. Flasar, Michael |
author_sort |
Coustenis, Athéna |
title |
Titan's South Pole Temporal Evolution of HC3N and other trace gases |
title_short |
Titan's South Pole Temporal Evolution of HC3N and other trace gases |
title_full |
Titan's South Pole Temporal Evolution of HC3N and other trace gases |
title_fullStr |
Titan's South Pole Temporal Evolution of HC3N and other trace gases |
title_full_unstemmed |
Titan's South Pole Temporal Evolution of HC3N and other trace gases |
title_sort |
titan's south pole temporal evolution of hc3n and other trace gases |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-03734196 |
op_coverage |
Tucson, AZ, United States |
genre |
South pole |
genre_facet |
South pole |
op_source |
Bulletin of the American Astronomical Society AAS/Division for Planetary Sciences Meeting #46 https://hal.science/hal-03734196 AAS/Division for Planetary Sciences Meeting #46, Nov 2014, Tucson, AZ, United States |
op_relation |
hal-03734196 https://hal.science/hal-03734196 BIBCODE: 2014DPS.4610206C |
_version_ |
1799466935565418496 |