| 东南极冰盖中山站－DOme A断面路线考察的初步结果 |
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| 引用本文： | 任贾文,秦大河,效存德.东南极冰盖中山站－DOme A断面路线考察的初步结果[J].冰川冻土,2001,23(1):51-56. |
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| 作者姓名： | 任贾文 秦大河 效存德 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所冰芯与寒区环境开放研究实验室, |
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| 基金项目： | 中国科学院知识创新工程项目;KZCX2-303; |
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| 摘 要： | 1996年以来，中国国家南极考察队连续3次进行了南极冰盖内陆考察，最远点距海岸1100km,海拔3900米，沿考察路线对冰盖表面地形，表面雪层特征，雪积累速率，冰体厚度和运动速度等进行现场观测，采集0．6－3．3米深度雪坑样品，在4个地点钻取50－100m，深度冰芯5支，部分资料和样品的初步分析表明，由于研究区域毗邻Lambert冰川和格罗夫山，冰面地形较多起伏，中段很大区域坡面朝向Lambert冰川，自中山站向内陆460km积累速率为46－210kg.m^-2.a^-1(相当于12－60厘米厚度雪层），表面1米深度雪的密度为350－450kg/m^-3，雪变成冰的深度（密度达830kg.m^-3)在几个冰芯钻取地点大约为60米，说明研究区域内雪的变质过程基本相同，300km处50米冰芯初步分析显示，过去几十年积累速率和温度均呈上升趋势，这虽然与南极地区其他针点的结果相一致，但却和毗邻的Lambert冰川西侧研究结果相反。
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| 关 键 词： | 中国南极内陆考察 雪积累速率 气候变化 南极 冰盖 中山站 |
| 文章编号： | 100O-0240(2001)01-0051-06 |
| 修稿时间： | 2000年9月11日 |
Preliminary Results of the Inland Expeditions along a Transect from the Zhongshan Station to Dome A, East Antarctica |
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| REN Jia-wen,QIN Da-he,XIAO Cun-de.Preliminary Results of the Inland Expeditions along a Transect from the Zhongshan Station to Dome A, East Antarctica[J].Journal of Glaciology and Geocryology,2001,23(1):51-56. |
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| Authors: | REN Jia-wen QIN Da-he XIAO Cun-de |
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| Abstract: | Chinese National Antarctic Research Expedition (CHINARE) has made three inland tray
erses from the Zhongshan Station to Dome A in East Antarctica since 1996, and the farthest spot arrived (3 900 ma. s. 1. ) is 1 100 km away from the coast. During these traverses, glaciological investigation (including the ice sheet topography, stratigraphy in snow pits and snow/firn cores, snow accumulation, ice sheet thickness and ice flow velocity, etc. ) has been carried out. In addition, snow samples were taken from snow pits (0. 6～3.3 m in depth), and five ice cores (50～ 100 m in length) were recovered at four sites.
The primary results show that the surveyed terrain is undulatory due to its adjacence to the Lambert Glacier and Mount Grove, and its facing towards the Lambert Glacier in the middle section of the traverse. Accumulation rate derived from stake measurement within the initial 460 km route is between 12 and 60 cm snow per year, equivalent to 46 to 210 kg · m-2 · a-1. The average density of 1 m surface snow is between 350 and 450 kg · m-3. The depth of pore close-off (corresponding to a density of 830 kg · m-3) is around 60 m at all the ice-core drilling sites, which implies that snow metamorphose process is similar in the whole surveyed regions.
Study of the 50 m ice core (300 km away from the Zhongshan Station) indicates that both accumulation rate and air temperature has a slight increase, which is consistent to the results deduced from most Antarctic sites, but converse to the situation at the west side of the Lambert Glacier. |
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| Keywords: | Antarctic Inland Traverse of China snow accumulation rate climate change |
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