Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica
Better assessing the dynamic of stratosphere‐troposphere exchange is a key point to improve our understanding of the climate dynamic in the East Antarctica Plateau, a region where stratospheric inputs are expected to be important. Although tritium (3H or T), a nuclide naturally produced mainly in th...
Published in: | Journal of Geophysical Research: Atmospheres |
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Language: | English |
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American Geophysical Union
2018
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Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/30229 https://doi.org/10.1002/2018JD028304 |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/30229 2023-05-15T13:46:14+02:00 Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica FOURRÉ, E. LANDAIS, A. CAUQUOIN, A. JEAN-BAPTISTE, P. LIPENKOV, V. PETIT, J.-R. 2018 https://oskar-bordeaux.fr/handle/20.500.12278/30229 https://doi.org/10.1002/2018JD028304 en eng American Geophysical Union 2169-897X https://oskar-bordeaux.fr/handle/20.500.12278/30229 doi:10.1002/2018JD028304 Planète et Univers [physics]/Océan Atmosphère Article de revue 2018 ftoskarbordeaux https://doi.org/10.1002/2018JD028304 2021-05-11T22:31:00Z Better assessing the dynamic of stratosphere‐troposphere exchange is a key point to improve our understanding of the climate dynamic in the East Antarctica Plateau, a region where stratospheric inputs are expected to be important. Although tritium (3H or T), a nuclide naturally produced mainly in the stratosphere and rapidly entering the water cycle as HTO, seems a first‐rate tracer to study these processes, tritium data are very sparse in this region. We present the first high‐resolution measurements of tritium concentration over the last 50 years in three snow pits drilled at the Vostok station. Natural variability of the tritium records reveals two prominent frequencies, one at about 10 years (to be related to the solar Schwabe cycles) and the other one at a shorter periodicity: despite dating uncertainty at this short scale, a good correlation is observed between 3H and Na+ and an anticorrelation between 3H and δ18O measured on an individual pit. The outputs from the LMDZ Atmospheric General Circulation Model including stable water isotopes and tritium show the same 3H‐δ18O anticorrelation and allow further investigation on the associated mechanism. At the interannual scale, the modeled 3H variability matches well with the Southern Annular Mode index. At the seasonal scale, we show that modeled stratospheric tritium inputs in the troposphere are favored in winter cold and dry conditions. Other/Unknown Material Antarc* Antarctica East Antarctica OSKAR Bordeaux (Open Science Knowledge ARchive) East Antarctica Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) Journal of Geophysical Research: Atmospheres 123 6 3009 3018 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Planète et Univers [physics]/Océan Atmosphère |
spellingShingle |
Planète et Univers [physics]/Océan Atmosphère FOURRÉ, E. LANDAIS, A. CAUQUOIN, A. JEAN-BAPTISTE, P. LIPENKOV, V. PETIT, J.-R. Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica |
topic_facet |
Planète et Univers [physics]/Océan Atmosphère |
description |
Better assessing the dynamic of stratosphere‐troposphere exchange is a key point to improve our understanding of the climate dynamic in the East Antarctica Plateau, a region where stratospheric inputs are expected to be important. Although tritium (3H or T), a nuclide naturally produced mainly in the stratosphere and rapidly entering the water cycle as HTO, seems a first‐rate tracer to study these processes, tritium data are very sparse in this region. We present the first high‐resolution measurements of tritium concentration over the last 50 years in three snow pits drilled at the Vostok station. Natural variability of the tritium records reveals two prominent frequencies, one at about 10 years (to be related to the solar Schwabe cycles) and the other one at a shorter periodicity: despite dating uncertainty at this short scale, a good correlation is observed between 3H and Na+ and an anticorrelation between 3H and δ18O measured on an individual pit. The outputs from the LMDZ Atmospheric General Circulation Model including stable water isotopes and tritium show the same 3H‐δ18O anticorrelation and allow further investigation on the associated mechanism. At the interannual scale, the modeled 3H variability matches well with the Southern Annular Mode index. At the seasonal scale, we show that modeled stratospheric tritium inputs in the troposphere are favored in winter cold and dry conditions. |
format |
Other/Unknown Material |
author |
FOURRÉ, E. LANDAIS, A. CAUQUOIN, A. JEAN-BAPTISTE, P. LIPENKOV, V. PETIT, J.-R. |
author_facet |
FOURRÉ, E. LANDAIS, A. CAUQUOIN, A. JEAN-BAPTISTE, P. LIPENKOV, V. PETIT, J.-R. |
author_sort |
FOURRÉ, E. |
title |
Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica |
title_short |
Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica |
title_full |
Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica |
title_fullStr |
Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica |
title_full_unstemmed |
Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica |
title_sort |
tritium records to trace stratospheric moisture inputs in antarctica |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/30229 https://doi.org/10.1002/2018JD028304 |
long_lat |
ENVELOPE(106.837,106.837,-78.464,-78.464) |
geographic |
East Antarctica Vostok Station |
geographic_facet |
East Antarctica Vostok Station |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_relation |
2169-897X https://oskar-bordeaux.fr/handle/20.500.12278/30229 doi:10.1002/2018JD028304 |
op_doi |
https://doi.org/10.1002/2018JD028304 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
123 |
container_issue |
6 |
container_start_page |
3009 |
op_container_end_page |
3018 |
_version_ |
1766238833243848704 |