搜索到78篇“ VOSTOK“的相关文章
“东方-2022”演习实兵实弹演练目击记
2022年
9月6日,“东方-2022”演习实兵实弹演练在谢尔盖耶夫斯基训练场和日本海正式拉开帷幕。中国、俄罗斯、印度、阿尔及利亚、亚美尼亚、白俄罗斯、阿塞拜疆、塔吉克斯坦、蒙古国、吉尔吉斯斯坦等国军队,共同进行了一场现代化联合战役演练。此次演习课题为“指挥运用部队集群守卫东部地区安全”。
梅世雄许怡真刘敏刘丹(图)
南极东方站深冰层及冰下湖钻探技术被引量:2
2021年
自1970年至今,前苏联和俄罗斯在南极东方站持续进行了近50年的冰层钻探活动,先后攻克了包含粒雪层、冰层、冰岩夹层和湖水冻结冰的复杂冰层钻进难题,逐渐形成了一套集热融取芯钻探、电动机械取芯钻探和分支孔钻探等为一体的深冰芯钻探技术。创造了冰层最深干孔钻进深度记录(952.4 m)、最深热融取芯钻进记录(2755 m)、最深冰芯钻探记录(3769.3 m),累计进尺达13000 m,并获取了总长超46 m的含湖水冻结冰样品的冰芯。东方站的钻探活动对极地冰层钻探技术的发展起到了巨大的推动和引领作用,同时积累了宝贵的深冰钻探经验。通过对东方站深冰钻探技术的系统梳理,将为我国正在实施的深冰芯钻探和即将开启的冰下湖科学钻探提供重要的借鉴。
王秋雯李冰李冰孙友宏张楠孙友宏杨阳张楠
从东方号到国际空间站:苏联/俄罗斯航天舱载药箱60年发展历程
2021年
与普通人相比,航天员的身体素质都比较出色,但在轨飞行过程中舱内空间狭小、太空辐射、失重等多种不利因素,会导致航天员身体机能衰退、生理功能紊乱、抵抗力下降,甚至发生各种疾病和损伤。正在太空执行任务的航天员如果生病了,可就不像地面这么方便了。
余世水
关键词:国际空间站航天员生理功能紊乱在轨飞行身体素质
Characterizing three-dimensional features of Antarctic subglacial lakes from the inversion of hydraulic potential——Lake Vostok as a case study
2019年
To estimate basal water storage beneath the Antarctic ice sheet, it is essential to have data on the three-dimensional characteristics of subglacial lakes. We present a method to estimate the water depth and surface area of Antarctic subglacial lakes from the inversion of hydraulic potential method. Lake Vostok is chosen as a case study because of the diverse and comprehensive measurements that have been obtained over and around the lake. The average depth of Lake Vostok is around 345±4 m. We estimated the surface area of Lake Vostok beneath the ice sheet to be about 13300±594 km^2. The lake consists of two sub-basins separated by a ridge at water depths of about 200–300 m. The surface area of the northern sub-basin is estimated to be about half of that of the southern basin. The maximum depths of the northern and southern sub-basins are estimated to be about 450 and 850 m, respectively. Total water volume is estimated to be about 4658±204 km^3. These estimates are compared with previous estimates obtained from seismic data and inversion of aerogravity data. In general, our estimates are closer to those obtained from the inversion of aerogravity data than those from seismic data, indicating the applicability of our method to the estimation of water depths of other subglacial lakes.
LI YanLU YangZHANG ZizhanSHI HonglingXI Hui
关键词:THREE-DIMENSIONALFEATURESVOSTOKHYDRAULICPOTENTIALSUBGLACIAL
从东方1号到国际空间站:俄罗斯航天医学发展征程
2019年
1961年4月12日,加加林完成了人类首次太空飞行,对现代文明产生了巨大影响。这次里程碑式的太空之旅向世界回答了一个重要问题:人,究竟能否在太空中生活和工作?
王永生崔桂玲
关键词:国际空间站航天太空飞行现代文明
Thermobaric Conditions at Ice-Water Interface in Subglacial Lake Vostok, East Antarctica被引量:1
2015年
Thermobaric conditions of subglacial Antarctic environment remain poorly understood, despite recent advances in radar and seismic surveying. The direct accessing to the largest subglacial lake, Lake Vostok, was carried out twice by Russian scientists in February 2012 and January 2015, opening new opportunities for assessing the thermobaric conditions at ice-water interface. According to the assumption that ice sheet is “floating” on the lake, it was predicted that the water would rise 30 - 40 m in the bottom part of the borehole, but in fact the water rose from the lake to a height of more than 500 m. To explain this phenomenon we assume that the pressure in Lake Vostok results from the external pressure of the entire mass of ice above it and the pressure of the water column that is overlaid above the point being considered. Extrapolation of temperature measurements from the deep bore-holes drilled at Vostok Station also confirmed that the bed of the ice sheet is at pressure melting point. As a result of accessing Lake Vostok, the pressure in the lake is reduced that would lead to the formation of a new additional layer of accretion ice on the lower ice sheet surface.
P. G. ТalalayA. N. Markov
关键词:SUBGLACIALLAKEICEDRILLINGHYDROSTATICBOREHOLE
Intraplate Transtensional Tectonics in the East Antarctic Craton: Insight from Buried Subglacial Bedrock in the Lake Vostok—Dome C Region
2013年
This study presents the results of forward numerical models of a series of sections of the Aurora Trench (East Antarctica) derived from radio echo-sounding data that allowed to reconstruct the 3D shape of the Aurora Fault, a crustal listric normal fault characterized by a length exceeding 100 km. A similar extensional fault setting allows to replicate the asymmetric buried morphology of the magnetic basement at the Lake Vostok depression derived by the available gravity and magnetic profiles. Both the Aurora and Vostok listric fault reach their basal decollment at 34 km depth, possibly the base of the crust in this intracratonic environment. Integration of these results with the existing geologic interpretations of the tectonic origin of the Concordia Trench by normal faulting allowed to frame the Concordia, Aurora and Vostok normal faults within an intraplate transtensional corridor with a left-lateral movement component. The westward projection of the proposed strike-slip deformation belt may develop in correspondence of an older tectonic lineament stretching from the Eastern flanks of the Gamburtsev Subglacial Mts to the Lambert rift and characterized by a poly-phased complex tectonic history. The possible Cenozoic reactivation of these structures is discussed in the paper.
Paola CianfarraFrancesco Salvini
关键词:TECTONICS
Russian researchers reach subglacial Lake Vostok in Antarctica被引量:3
2012年
Opening a new scientific frontier lying under the Antarctic ice, Russian researchers have drilled down and finally reached the surface of the gigantic freshwater lake, Lake Vostok. The mission chief likened the achievement to placing a man on the moon. Drilling in the area of the lake began 22 years ago in 1990, but progressed slowly as a result of funding shortages, equipment breakdowns, difficulties of drilling in the "warm" ice, and environmental concerns. In 1996, six years after drilling was started, a group of Russian and British scientists discovered the lake believed to be one of the largest fresh water reservoirs on the planet. This lake is among the last unexplored places on Earth. Sealed from the Earth's atmosphere for millions of years, it may provide vital information about microbial evolution, the past climate of the Earth, and the formation of the Antarctic ice sheet. Russian experts waited several years for international approval of their drilling technology before proceeding. As anticipated, lake water under pressure rushed up the borehole, pushing the drilling fluid up and away, then froze, forming a protective plug that prevented contamination of the lake. In December of the next Antarctic season, 2012--2013, researchers plan to re-drill the frozen sample of subglacial water for analysis.
TALALAY Pavel
“东方一号”飞天始末——纪念世界第一艘载人飞船发射50周年
2011年
2011年4月12日,世界载人航天50周年纪念日。50年前,加加林代表人类搭乘“东方一号”第一次飞出地球进入太空。举世瞩目,万众欢呼。50年过去了,“东方一号”飞天前后,还有哪些不为人知的精彩故事和神秘内幕呢?
士元
关键词:载人航天飞船发射太空
The 4700 aB.P. volcanic signal detected in Vostok BH8 ice core, Antarctica被引量:2
2005年
The detailed electrical conductivity measure- ment (ECM), trace chemical compositions and microparti- cles concentration analysis are performed for BH8 ice core from the depth of 126.0m to 130.0m at Vostok Station. At depth 128.7m, a volcanic signal 4726 a B.P. is detected. The volcanic sulphate flux is 95.8 kg·km?2, sulphate peak concen- tration 1352.8 ng·g?1, duration time about 10.1 years, com- parable with some well-known volcanic events. The results indicate that it seems to be a relatively large scale, long last- ing volcanic signal with farther volcanic origin.
LIU LeibaoKANG JianchengJean R. PetitJefferson C. SimoesMartine De Angelis
关键词:火山岩微粒子

相关作者

刘雷保
作品数:14被引量:62H指数:4
供职机构:中国极地研究中心
研究主题:冰川 冰芯 夏季 温度场 海冰
秦大河
作品数:351被引量:5,899H指数:35
供职机构:中国科学院
研究主题:气候变化 冰川 冰芯 青藏高原 冰冻圈
康建成
作品数:99被引量:797H指数:17
供职机构:上海师范大学
研究主题:海冰 气候变化 黑潮 夏季 温度
王树基
作品数:16被引量:68H指数:4
供职机构:中国科学院新疆地理研究所
研究主题:干旱区 晚新生代 第四纪 区域环境 干旱地区
效存德
作品数:212被引量:1,016H指数:20
供职机构:北京师范大学地理学与遥感科学学院地表过程与资源生态国家重点实验室
研究主题:冰芯 气候变化 冰冻圈 南极冰盖 雪冰