Surface topography around the summit of Dome A, Antarctica, from real-time kinematic GPS
Surface topography around the summit of Dome A, Antarctica, from real-time kinematic GPS
复制标题
南极洲 Dome A 山顶周围的地表地形，来自实时运动 GPS
DOI：
10.3189/172756507781833965
复制
发表时间：
2007
影响因子：
3.4
通讯作者：
Zhou Chunxia
中科院分区：
文献类型：
--
作者：
Zhang Shengkai;E Dongchen;Wang Zemin;Shen Qiang;Zhou Chunxia
了解南极的表面地形非常重要，因为它被用作估计表面温度、降水量和下降风的强度和方向的投入（Marsiat和Bamber，1997年）。高程数据可用于确定冰分水岭、流域和冰流方向的位置（德鲁里，1983年）。此外，结合冰层厚度数据，还可以推断驱动应力、变形速度以及地下和基底条件（Bamber和Bindschadler，1997年）。冰在平坦的内陆极地峰顶地区流动非常缓慢，因此很难测量动态。南极洲康科迪亚冰穹（冰穹C;塔布拉等人，1998年;卡普拉等人，2000年;雷米和塔布拉等人，2000年）、南极洲富士冰穹（冰穹F深取芯小组，1998年）和格陵兰岛顶峰（霍奇等人，1990年;赫维德伯格等人，1997年）的表面和海床地形已在近年来确定。然而，到目前为止，很少有发表的表面地形在Dome Argus（Dome A），南极洲。冰穹A是南极洲最高的冰体，海拔4000米，位于东南极洲中心附近。其形态的细节首先由斯科特极地研究所（SPRI）-美国国家科学基金会（NSF）-丹麦技术大学（TUD）的机载无线电回声探测计划，1967-79确定。作为对国际跨南极科学考察（ITASE）的贡献，中国国家南极科学考察队于1996/97年夏季在南极中山站至冰穹A的一条导线上进行了沿着的冰川学研究（第13届非洲发展新伙伴关系）至2004/05年（第21届非洲发展新伙伴关系）（Qin等人，2000年，2004年; Xiao等人，2001年，2004年; Zhang等人，2002年; Ren等人，2004年）。在第21次南极考察期间，在1 228公里的穿越路线上，沿着大约每隔50公里建立了20多个全球定位系统站点，以监测表面冰速，这将在其他地方报告。在这里，我们提出了圆顶的顶峰的表面地形测量的实时动态（RTK）全球定位系统，一种工具，非常适合在南极洲内部的表面地形测量，因为它允许高精度的测量，以相对较快的速度和最低的后勤支持。根据雷达卫星1号南极测绘项目数字高程模型（Liu和其他人，1999年）得出的圆顶A周围地形对峰顶位置的估计，2005年1月9日至11日利用全站仪进行了一次测量，以获得峰顶位置的第二次估计。在这一新的阵地上设立了一个营地，作为一个基准站，最初由一个全球定位系统接收器占用36小时。使用Leica Geo Office（LGO）V1.0点定位软件计算参考站的位置。1984年世界大地测量系统（WGS 84）的椭球坐标为80822001.6288800 S，77822022.9026900 E，4092.457 m。两台Leica SR 530双频GPS接收机用于动态测量。一个流动站接收器被安装在一辆雪地车上。调查是在一个“星星”网格上进行的，以营地为中心，半径为4-5公里。采样间距为200 m。车辆的速度为每小时4至8公里。经过5天的实地调查，共调查了1000多个点。全球定位系统的数据是用GAMIT/GLOBK软件处理的（King，2002年）。在数据处理过程中：
Knowledge of the surface topography of the Antarctic is very important because it is used as input to estimate the surface temperature, precipitation and katabatic wind intensity and direction (Marsiat and Bamber, 1997). Elevation data can be used to determine the locations of ice divides, drainage basins and ice-flow directions (Drewry, 1983). In addition, together with ice-thickness data, driving stress, deformational velocity and subsurface and basal conditions may be inferred (Bamber and Bindschadler, 1997). Ice flows very slowly in the flat, inland polar summit regions, and thus the dynamics are difficult to measure. The surface and bed topography at Dome Concordia, Antarctica, (Dome C; Tabacco and others, 1998; Capra and others, 2000; Rémy and Tabacco, 2000), Dome Fuji, Antarctica, (Dome-F Deep Coring Group, 1998) and the summit of Greenland (Hodge and others, 1990; Hvidberg and others, 1997) have been determined in recent years. So far, however, little has been published on the surface topography at Dome Argus (Dome A), Antarctica. Dome A, the highest ice feature in Antarctica at just over 4000m elevation, is located near the centre of East Antarctica. Details of its morphology were first determined by the Scott Polar Research Institute (SPRI)–US National Science Foundation (NSF)–Technical University of Denmark (TUD) airborne radio-echosounding program, 1967–79. As a contribution to the International Trans-Antarctic Scientific Expedition (ITASE), Chinese National Antarctic Research Expedition (CHINARE) glaciological studies were conducted along a traverse line from Zhongshan station to Dome A during the austral summers from 1996/97 (13th CHINARE) to 2004/05 (21st CHINARE) (Qin and others, 2000, 2004; Xiao and others, 2001, 2004; Zhang and others, 2002; Ren and others, 2004). During the 21st CHINARE, more than 20 global positioning system (GPS) sites were established at approximately 50 km intervals along the 1228 km traverse route, to monitor the surface ice velocity, which will be reported elsewhere. Here, we present the surface topography of the summit of Dome A measured by real-time kinematic (RTK) GPS, a tool that is well suited to surface topography measurements in the interior of the Antarctic as it allows high-precision measurements to be made relatively quickly and with minimum logistical support. Based on an estimate of the summit position from the topography around Dome A, obtained from the RADARSAT-1 Antarctic Mapping Project (RAMP) digital elevation model (Liu and others, 1999), a survey was carried out during 9–11 January 2005 using a total station to obtain a second estimate of the summit position. A camp was set up at this new position which was established as a reference station, initially occupied by a GPS receiver for 36 hours. The location of the reference station was calculated using Leica Geo Office (LGO) V1.0 point positioning software. The World Geodetic System 1984 (WGS84) ellipsoid coordinates were 80822001.6288800 S, 77822022.9026900 E, 4092.457m. Two Leica SR530 dual-frequency GPS receivers were used for the kinematic survey. A rover receiver was installed on an over-snow vehicle. The survey was carried out on a ‘star’ grid, centered on the camp, with a radius of 4–5 km. The sampling space was 200m. The speed of the vehicle ranged from 4 to 8 kmh. After 5 days of fieldwork, more than 1000 points had been surveyed. GPS data were processed using GAMIT/GLOBK software (King, 2002). During the data processing:
登录
查看更多内容
DOI：
10.2307/634373
发表时间：
1984-11
期刊：
The Geographical Journal
影响因子：
--
作者：
J. Sutton;D. Drewry
通讯作者：
J. Sutton;D. Drewry
影响因子：
2.9
作者：
A. Capra;R. Cefalo;S. Gandolfi;G. Manzoni;I. Tabacco;L. Vittuari
通讯作者：
A. Capra;R. Cefalo;S. Gandolfi;G. Manzoni;I. Tabacco;L. Vittuari
影响因子：
3.4
作者：
Xiao Cunde;Ren Jiawen;Q. Dahe;Li Zhongqin;Sun Weizhen;I. Allison
通讯作者：
Xiao Cunde;Ren Jiawen;Q. Dahe;Li Zhongqin;Sun Weizhen;I. Allison
影响因子：
2.9
作者：
Y. Ageta;Y. Azuma;Y. Fujii;K. Fujino;S. Fujita;T. Furukawa;T. Hondoh;T. Kameda;K. Kamiyama;K. Katagiri;K. Kawada;T. Kawamura;Sumio Kobayashi;S. Mae;H. Maeno;T. Miyahara;H. Motoyama;Y. Nakayama;R. Naruse;F. Nishio;K. Saitoh;T. Saitoｈ;Kunio Shimbori;T. Shiraiwa;H. Shoji;Akiyoshi Takahashi;Shuhei Takahashi;Y. Tanaka;K. Yokoyama;O. Watanabe
通讯作者：
Y. Ageta;Y. Azuma;Y. Fujii;K. Fujino;S. Fujita;T. Furukawa;T. Hondoh;T. Kameda;K. Kamiyama;K. Katagiri;K. Kawada;T. Kawamura;Sumio Kobayashi;S. Mae;H. Maeno;T. Miyahara;H. Motoyama;Y. Nakayama;R. Naruse;F. Nishio;K. Saitoh;T. Saitoｈ;Kunio Shimbori;T. Shiraiwa;H. Shoji;Akiyoshi Takahashi;Shuhei Takahashi;Y. Tanaka;K. Yokoyama;O. Watanabe
影响因子：
--
作者：
Hongxing Liu;K. Jezek;Biyan Li
通讯作者：
Hongxing Liu;K. Jezek;Biyan Li