Contribution of the Southern Annular Mode to Variations in Water Isotopes of Daily Precipitation at Dome Fuji, East Antarctica
Contribution of the Southern Annular Mode to Variations in Water Isotopes of Daily Precipitation at Dome Fuji, East Antarctica
复制标题
南环模态对南极洲东部圆顶富士日降水水同位素变化的贡献
DOI:
10.1029/2021jd035397
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Yoshimura Kei
中科院分区:
文献类型:
--
作者:
Kino Kanon;Okazaki Atsushi;Cauquoin Alexandre;Yoshimura Kei
Water isotopes measured in Antarctic ice cores enable reconstruction at the first order of the past temperature variations. However, the seasonality of the precipitation and episodic events, including synoptic‐scale disturbances, influence the isotopic signals recorded in ice cores. In this study, we adopted an isotope‐enabled atmospheric general circulation model from 1981 to 2010 to investigate variations in climatic factors in δ18O of precipitation (δ18Op) at Dome Fuji, East Antarctica. The Southern Annular Mode (SAM), the primary mode of atmospheric circulation in the southern midhigh latitudes, significantly contributes to the isotope signals. Positive δ18Opanomalies, especially in the austral winter, are linked to the negative polarity of the SAM, which weakens westerly winds and increases the southward inflow of water vapor flux. Daily variations in temperature and δ18Opin Dome Fuji are significantly small in the austral summer, and their contribution to the annual signals is limited. The isotope signals driven by the SAM are a locational feature of Dome Fuji, related to the asymmetric component of the large‐scale atmospheric pattern.
登录
查看更多内容
影响因子:
4
作者:
L. Sime;K. Kohfeld;Corinne Le Quéré;E. Wolff;A. M. Boer;Robert M. Graham;L. Bopp
通讯作者:
L. Sime;K. Kohfeld;Corinne Le Quéré;E. Wolff;A. M. Boer;Robert M. Graham;L. Bopp
影响因子:
3.4
作者:
T. Kameda;H. Motoyama;S. Fujita;Shuhei Takahashi
通讯作者:
T. Kameda;H. Motoyama;S. Fujita;Shuhei Takahashi
影响因子:
4.6
作者:
M. Watanabe;S. Emori;S. Emori;S. Emori;Masaki Satoh;Masaki Satoh;Hiroaki Miura
通讯作者:
M. Watanabe;S. Emori;S. Emori;S. Emori;Masaki Satoh;Masaki Satoh;Hiroaki Miura
影响因子:
3.1
作者:
M. Chikira;M. Sugiyama
通讯作者:
M. Sugiyama
影响因子:
16.6
作者:
Werner M;Jouzel J;Masson-Delmotte V;Lohmann G
通讯作者:
Lohmann G