| 基于ICESat轨道交叉点分析的东南极Lambert-Amery系统当前高程变化特征分析 |
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| 引用本文： | 沈强,陈刚,鄂栋臣,周春霞.基于ICESat轨道交叉点分析的东南极Lambert-Amery系统当前高程变化特征分析[J].地球物理学报,2011,54(8):1983-1989. |
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| 作者姓名： | 沈强 陈刚 鄂栋臣 周春霞 |
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| 作者单位： | 1. 中国科学院测量与地球物理研究所,武汉 430077;
2. Department of Geography, University of Calgary, Canada;
3. 武汉大学中国南极测绘研究中心,武汉 430079 |
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| 基金项目： | 国家自然科学基金(41004008,40825012),冰冻圈国家重点实验室开放基金(SKLCS 09-03),水资源与水电工程科学国家重点实验室开放基金(2009B054),中国地震局地震研究所所长基金(IS200826057,IS201026019)和国家科技支撑计划(2008BAC35B04-5)资助. |
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| 摘 要： | 南极冰盖物质平衡仍然是全球海平面变化估计的最大不确定因素.本文使用2003～2007年ICESat/GLAS获取的高精度冰盖测高数据,利用我们开发的高精度高程变化提取程序,首次获取了东南极最大冰流系统-Lambert-Amery地区在ICESat卫星轨道交叉点处的高程变化序列.依据冰川动力学原理,对该流域进行详细划分,...
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| 关 键 词： | Lambert-Amery System(LAS) 高程变化 ICESat/GLAS 交叉点分析 |
| 收稿时间： | 2010-10-04 |
Recent elevation changes on the Lambert-Amery system in East Antarctica from ICESat crossover analysis |
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| SHEN Qiang,CHEN Gang,E Dong-Chen,ZHOU Chun-Xia.Recent elevation changes on the Lambert-Amery system in East Antarctica from ICESat crossover analysis[J].Chinese Journal of Geophysics,2011,54(8):1983-1989. |
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| Authors: | SHEN Qiang CHEN Gang E Dong-Chen ZHOU Chun-Xia |
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| Institution: | 1. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China;
2. Department of Geography, University of Calgary, Canada;
3. Chinese Antarctic Center of Surveying and Mapping, SGG, Wuhan University, Wuhan 430079, China |
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| Abstract: | Mass balance of Antarctic ice sheet remains the largest source of uncertainty in estimation of global sea level change. Depending on our developed procedure on the basis of crossover analysis method, the current short-term rates of elevation change in Lambert-Amery system have been evaluated using ICESat/GLAS altimetry data over the period 2003~2007 comprising 10 ICESat observation periods. The interannual variability of elevation has been obtained in sub-regions of Lambert-Amery System (LAS), which are defined and calibrated on principle of glacier dynamics, using regression analysis method. We get the new conclusions shown as follows: (1) the elevations are almost increasing in all sub-regions except for AIS sub-region; (2) It is very obvious that there are largely regional variations of elevation in the sub-regions, the largest interannual variability of elevation in AIS and MGLup are -6.1 cm/a and 6.6 cm/a respectively; (3)Interannual variation of elevation in western LAS is 2~3 times that of the eastern part. This is the first time to get the series of elevation change in LAS with high-density and high-precision and its interannual variability in the sub-regions are fully analyzed. |
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| Keywords: | Lambert-Amery System(LAS) Elevation change ICESat/GLAS Crossover analysis |
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