Ice shelf advance and retreat rates along the coast of Queen Maud Land, Antarctica

Kim, K. T.; Jezek, Kenneth C.; Sohn, Hong-Gyoo

doi:10.1029/2000jc000317

Cited by 27 publications

(29 citation statements)

References 21 publications

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“…The temperature of the world's ocean in the upper few hundred metres increased 0.3 8C over the last century (Levitus et al 2000), which is large enough to impact ice shelves and glaciers. Few ice shelves have advanced in the last decades, most have retreated or remained stable (Kim et al 2001). This suggests a greater likelihood for ice shelf thinning and enhanced glacier flow than ice sheet growth.…”

Section: Discussionmentioning

confidence: 99%

Changes in ice dynamics and mass balance of the Antarctic ice sheet

Rignot

2006

Phil. Trans. R. Soc. A.

100

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The concept that the Antarctic ice sheet changes with eternal slowness has been challenged by recent observations from satellites. Pronounced regional warming in the Antarctic Peninsula triggered ice shelf collapse, which led to a 10-fold increase in glacier flow and rapid ice sheet retreat. This chain of events illustrated the vulnerability of ice shelves to climate warming and their buffering role on the mass balance of Antarctica. In West Antarctica, the Pine Island Bay sector is draining far more ice into the ocean than is stored upstream from snow accumulation. This sector could raise sea level by 1 m and trigger widespread retreat of ice in West Antarctica. Pine Island Glacier accelerated 38% since 1975, and most of the speed up took place over the last decade. Its neighbour Thwaites Glacier is widening up and may double its width when its weakened eastern ice shelf breaks up. Widespread acceleration in this sector may be caused by glacier ungrounding from ice shelf melting by an ocean that has recently warmed by 0.3 °C. In contrast, glaciers buffered from oceanic change by large ice shelves have only small contributions to sea level. In East Antarctica, many glaciers are close to a state of mass balance, but sectors grounded well below sea level, such as Cook Ice Shelf, Ninnis/Mertz, Frost and Totten glaciers, are thinning and losing mass. Hence, East Antarctica is not immune to changes.

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Section: Discussionmentioning

confidence: 99%

Changes in ice dynamics and mass balance of the Antarctic ice sheet

Rignot

2006

Phil. Trans. R. Soc. A.

100

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“…The authors used a two-dimensional linear wrapping function to match it to other data, but the accuracy of the coregistration is not sufficient to reliably measure changes, because of nonlinear distortions arising from earth curvature effects. Kim et al (2001) compiled Argon images along the coast of Queen Maud Land into a mosaic. Comparison with 1997 Radarsat imagery showed that the ice shelves in this region lost about 6.8% of their total area with most of the retreat occurring between 1963 and the mid-1970s.…”

Section: Introductionmentioning

confidence: 99%

Orthorectified image mosaic of Antarctica from 1963 Argon satellite photography: image processing and glaciological applications

Kim

Jezek

Liu

2007

International Journal of Remote Sensing

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Using the state-of-the-art digital imaging technology, extended block adjustment, orthorectification and mosaicking, individual Declassified Intelligence Satellite Argon photographic images are precisely assembled into a map quality mosaic of coastal Antarctica. The geometric accuracy of the mosaic is estimated to be approximately equivalent to the original resolution of the Argon photography, which is about 140 m. We compare the Argon mosaic with later satellite images to investigate changes in ice sheet geographic features and dynamical glaciological processes.

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“…The previous relevant studies on this topic are as follows: Kim et al utilized a collinearity equation to rectify ARGON imagery from 1963 to study the seasonal variations of glaciers on the Queen Maud Land coast of Antarctica [6]. Zhou and Jezek proposed a collinearity equation-based self-calibration block bundle adjustment method that integrates the bundle adjustment method and satellite orbital parameters, solving interior orientation (including lens distortion) and exterior orientation parameters (EOPs) simultaneously to rectify ARGON images from 1962 and 1963 [4].…”

Section: Introductionmentioning

confidence: 99%

Second-Order Polynomial Equation-Based Block Adjustment for Orthorectification of DISP Imagery

Zhou

Yue

Shi³

et al. 2016

Remote Sensing

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Due to the lack of ground control points (GCPs) and parameters of satellite orbits, as well as the interior and exterior orientation parameters of cameras in historical declassified intelligence satellite photography (DISP) imagery, a second order polynomial equation-based block adjustment model is proposed for orthorectification of DISP imagery. With the proposed model, 355 DISP images from four missions and five orbits are orthorectified, with an approximate accuracy of 2.0-3.0 m. The 355 orthorectified images are assembled into a seamless, full-coverage mosaic image map of the karst area of Guangxi, China. The accuracy of the mosaicked image map is within 2.0-4.0 m when compared to 78 checkpoints measured by Real-Time Kinematic (RTK) GPS surveys. The assembled image map will be delivered to the Guangxi Geological Library and released to the public domain and the research community.

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Ice shelf advance and retreat rates along the coast of Queen Maud Land, Antarctica

Cited by 27 publications

References 21 publications

Changes in ice dynamics and mass balance of the Antarctic ice sheet

Changes in ice dynamics and mass balance of the Antarctic ice sheet

Orthorectified image mosaic of Antarctica from 1963 Argon satellite photography: image processing and glaciological applications

Second-Order Polynomial Equation-Based Block Adjustment for Orthorectification of DISP Imagery

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