DOI: 10.1002/2018JD028304
Scopus记录号: 2-s2.0-85044316579
论文题名: Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica
作者: Fourré E. ; Landais A. ; Cauquoin A. ; Jean-Baptiste P. ; Lipenkov V. ; Petit J.-R.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 6 起始页码: 3009
结束页码: 3018
语种: 英语
英文关键词: AGCM
; Antarctica
; snow pit
; stratosphere
; tritium
Scopus关键词: annual variation
; atmospheric chemistry
; atmospheric dynamics
; concentration (composition)
; general circulation model
; moisture content
; radionuclide
; stratosphere-troposphere interaction
; tritium
; uncertainty analysis
; Antarctica
; East Antarctica
; Vostok Station
英文摘要: 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. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114255
Appears in Collections: 气候减缓与适应
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作者单位: Laboratoire des Sciences du Climat et de l'Environnement (UMR 8212 IPSL/CEA-CNRS-UVSQ), Orme des Merisiers, Gif-sur-Yvette, France; Laboratoire de Météorologie Dynamique, Université Paris 6, France; Now at Alfred Wegener Institute, Bremerhaven, Germany; Arctic and Antarctic Research Institute, St. Petersburg, Russian Federation; Institut des Géosciences de l'Environnement (UMR 5001 UGA/CNRS/IRD/G-INP), Paris, France
Recommended Citation:
Fourré E.,Landais A.,Cauquoin A.,et al. Tritium Records to Trace Stratospheric Moisture Inputs in Antarctica[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(6)