Recent Glacier Dynamics in the Northern Novaya Zemlya Observed by Multiple Geodetic Techniques
Recent Glacier Dynamics in the Northern Novaya Zemlya Observed by Multiple Geodetic Techniques
复制标题
通过多种大地测量技术观测新地岛北部近期冰川动态
DOI：
10.1109/jstars.2016.2643568
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发表时间：
2017-01
影响因子：
5.5
通讯作者：
Shum C. K.
中科院分区：
文献类型：
--
作者：
Sun Zhiyue;Lee Hyongki;Ahn Yushin;Aierken Abureli;Tseng Kuo-Hsin;Okeowo Modurodoluwa A.;Shum C. K.
在Novaya Zemlya(NVZ)，海洋末端冰川的融化已被确定为造成冰川流失的最重要因素。然而，在以往的研究中，并没有讨论内流对质量损失的影响。在这项研究中，我们对巴伦支海沿岸的四个冰川进行了多次大地测量，以确定冰川外流对净质量变化的影响，其中考虑了降雪带来的质量增加。根据重力恢复和气候实验(GRACE)数据，我们得到了2003-2014年间的平均冰损失率为-1.04±0.25/GT/年。我们发现，2007-2010年的年际增长率为4.30±0.97GT-1，这是没有公布的。此外，我们还观察到了2004-2007年和2010-2014年期间来自GRACE的另外两个负质量趋势的年际变化。将散斑匹配技术应用于合成孔径雷达数据对，以填补2007-2010年期间速度估计的空白，这在以前的研究中没有报道。2007-2010年的大规模增长可以用流入的增加来解释，而流出的变化可以忽略不计。此外，我们将类似的分析扩展到2002-2007年和2010-2014年，并确定了流出和流入对NVZ质量变化的贡献。特别是，2004-2007年和2010-2013年期间NVZ的质量损失与外流显著增加有关，同时观察到正流入异常。
In Novaya Zemlya (NVZ), melting marine-terminating glaciers have been identified to be the most significant contributor to the ice loss. However, the influence of influx on mass loss has not been discussed in previous studies. In this study, we present multiple geodetic observations of four glaciers along the Barents Sea coast to determine the influence of glacier outflow on net mass change by considering the mass gain from snowfall. We obtained the average ice loss rate of –1.04 ± 0.25 Gt year–1 during the period of 2003–2014 from the gravity recovery and climate experiment (GRACE) data. We discovered an interannual increase of 4.30 ± 0.97 Gt year–1 in 2007–2010 which had not been presented. In addition, we also observed two other interannual variations in the form of negative mass trends from GRACE during the periods of 2004–2007 and 2010–2014. A speckle-matching technique was applied on pairs of synthetic aperture radar data to fill the gap of velocity estimations for the period of 2007–2010 which were not reported in previous studies. The mass increase in 2007–2010 can be explained by the increase in influx while the change in outflow was negligible. In addition, we extended similar analysis to the periods of 2002–2007 and 2010–2014, and identified the contribution of outflow and influx to the mass change in NVZ. In particular, the mass losses in the periods of 2004–2007 and 2010–2013 in NVZ were related to the significant increase of outflow while positive influx anomalies were observed.
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影响因子：
13.5
作者：
T. Scambos;M. Dutkiewicz;Jeremy C. Wilson;R. Bindschadler
通讯作者：
T. Scambos;M. Dutkiewicz;Jeremy C. Wilson;R. Bindschadler
影响因子：
5.3
作者：
H. Lee;C. Shum;I. Howat;A. Monaghan;Y. Ahn;J. Duan;Junyi Guo;C. Kuo;Lei Wang
通讯作者：
H. Lee;C. Shum;I. Howat;A. Monaghan;Y. Ahn;J. Duan;Junyi Guo;C. Kuo;Lei Wang
影响因子：
--
作者：
S. Yi;Wenke Sun
通讯作者：
S. Yi;Wenke Sun
影响因子：
4.6
作者：
V. Radic;A. Bliss;A. C. Beedlow;R. Hock;Evan S. Miles;Evan S. Miles;J. Cogley
通讯作者：
V. Radic;A. Bliss;A. C. Beedlow;R. Hock;Evan S. Miles;Evan S. Miles;J. Cogley
影响因子：
13.5
作者：
Moholdt, Geir;Nuth, Christopher;Kohler, Jack
通讯作者：
Kohler, Jack