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| 1 | A 2680-year record of sea ice extent in the Ross Sea and the associated atmospheric circulation derived from the DT401 East Antarctic ice core显示文摘Long time series of Antarctic sea ice extent(SIE) are important for climate research and model forecasting. A historic ice extent in the Ross Sea in early austral winter was rebuilt through sea salt ions in the DT401 ice core in interior East Antarctica. El Ni?o-Southern Oscillation(ENSO) had a significant influence on the sea salt deposition in DT401 through its influence on the Ross Sea SIE and the transport of sea salt inland. Spectral analysis also supported the influence of ENSO with a significant 2–6 a periodicity band. In addition, statistically significant decadal(10 a) and pentadecadal(50–70 a) periodicities suggested the existence of a teleconnection from the Pacific decadal oscillation(PDO), which originated from sea surface temperature anomalies in the tropical Pacific Ocean. The first eigenvector of the empirical orthogonal function analysis(EOF1) showed lower values during the Medieval Warm Period(MWP), while higher values were found in the Little Ice Age(LIA). A higher frequency of ENSO events were found in the cold climatic stage. The post 1800 AD period was occupied by significant fluctuations of the EOF1, and PDO may be one of the influencing factors. The EOF1 values showed moderate fluctuations from 680 BC to 1000 AD, showing that the climate was relatively stable in this period. | LI ChuanJin REN JiaWen XIAO CunDe HOU ShuGui DING MingHu QIN DaHe | 2015 | Science China Earth Sciences2015，58，11： | 4 |
| 2 | 卫星激光测高数据在极地区域的应用及展望显示文摘极地冰盖、冰架和海冰变化监测对于极地的气候变化、物质平衡,有效应对全球气候变化有着重要的意义。卫星激光测高数据在极地区域的应用效果得到了广泛的认可,本研究系统地分析了卫星激光测高数据以及与其他数据源联合进行极地区域应用的研究进展,并对研究方法进行了综述,对研究结果进行了对比分析,希望能为国产高分七号卫星激光测高数据在极地的应用提供参考。 | 权学烽 唐新明 高小明 李国元 付安民 | 2019 | 测绘与空间地理信息2019，42，10： | 3 |
| 3 | 南极埃默里冰架“松动牙齿”冰裂缝内冰雪填充物监测显示文摘冰架裂缝的冰雪填充物(Mélange)分布和变化受冰架变化的影响,同时会影响冰架的稳定性.2019年9月25日,东南极埃默里冰架'松动牙齿'裂缝系统发生崩解,形成了面积>1600 km^(2)的冰山,裂缝内的填充物出现部分流失.采用Landsat-8卫星光学数据和哨兵1号卫星SAR影响数据,结合CryoSat-2卫星测高数据和南极参考高程模型计划(REMA)8 m分辨率DEM产品,对埃默里冰架'松动牙齿'裂缝L1、T1、T2的填充物表面形态特征及其变化进行了定量评估.结果显示:T1裂缝填充物的高程平均高于T2裂缝,表面起伏变化更明显;2016-2018年L1裂缝系统填充物高程逐年降低;在诸多影响因素中,冰流缝合区的存在对填充物冰厚度的影响不容忽视;裂缝中填充物的存在很可能促进裂缝的延伸发育. | 杨宸 程晓 李腾 刘岩 张宝钢 | 2021 | 北京师范大学学报(自然科学版)2021，57，4： | 1 |
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