| Distribution of δD in 25-cm Surface Snow Along Trans-Antarctic Route (Ⅱ)——The “1990 International Trans-Antarctic Expedition” Glaciological Research |
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| 作者姓名： | 秦大河 任贾文 王文悌 J.R.Petit J.Jouzel |
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| 作者单位： | Lanzhou Institute of Glaciology and Geocryology,Academia Sinica,Lanzhou 730000,PRC,Lanzhou Institute of Glaciology and Geocryology,Academia Sinica,Lanzhou 730000,PRC,Lanzhou Institute of Glaciology and Geocryology,Academia Sinica,Lanzhou 730000,PRC,Laboratoire de Glaciologie et Géophysique de I'Environment B.P. 68,38402 St. Martin-d'Heres,Cedex,Laboratoire de Modélisation du Climate et de l'Environment,Centre d'Etudes Nucléaires de Saclay,91191 Gif-Sur-Yvette Cedex,France,Laboratoire de Glaciologie et Géophysique de I'Environment B.P. 68,38402 St. Martin-d'Heres,Cedex,Laboratoire de Modélisation du Climate et de l'Environment,Centre d'Etudes Nucléaires de Saclay,91191 Gif-Sur-Yvette Cedex,France |
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| 基金项目： | Project supported by the State Science and Technology Committee of China,the National Natural Science Foundation of China and the State Committee for Antarctic Research of China. |
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| 摘 要： | On the way of the "1990 International Trans-Antarctic Expedition", the first author of this paper, the Chinese member of the expedition, collected 104 snow samples in 25-cm surface snow along a 5986-km route on Antarctic ice sheet from west to east. The geographical distribution of δD across the Antarctica by the longest route is obtained from stable isotope analysis for the first time. After discussing regional differences of physical geographic conditions, maritime-continental influence, altitudes and latitudes at sampling sites, the distribution of δD is considered to have a close relation to latitudes, but the topographic effect is prominent in some particular regions. The mean annual temperature at sampling site and its relationship with δD in surface snow covering Antarctica from west to east are discussed also. The δD-temperature gradient from the south end of Antarctic Peninsula to Vostok obtained in this paper is very close to that in Terre Adelie Land obtained by predecessors. The snow-dri
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| 关 键 词： | δD precipitation pattern regional variation mean annual temperature. |
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