Validation of Glacier Topographic Acquisitions from an Airborne Single-Pass Interferometer.

The airborne glacier and ice surface topography interferometer (GLISTIN-A) is a single-pass radar interferometer developed for accurate high-resolution swath mapping of dynamic ice surfaces. We present the first validation results of the operational sensor, collected in 2013 over glaciers in Alaska and followed by more exhaustive collections from Greenland in 2016 and 2017. In Alaska, overlapping flight-tracks were mosaicked to mitigate potential residual trends across-track and the resultant maps are validated with lidar.

Rapid submarine ice melting in the grounding zones of ice shelves in West Antarctica.

Enhanced submarine ice-shelf melting strongly controls ice loss in the Amundsen Sea embayment (ASE) of West Antarctica, but its magnitude is not well known in the critical grounding zones of the ASE's major glaciers. Here we directly quantify bottom ice losses along tens of kilometres with airborne radar sounding of the Dotson and Crosson ice shelves, which buttress the rapidly changing Smith, Pope and Kohler glaciers. Melting in the grounding zones is found to be much higher than steady-state levels, removing 300-490 m of solid ice between 2002 and 2009 beneath the retreating Smith Glacier.

Upper Lumbar Mature Cystic Teratoma: A Case Report.

Background: Intradural extramedullary spinal teratoma (IEST) is a rare condition in adults, with a male predominance. It is commonly associated with spinal dysraphism, lumbar puncture, and previous spinal surgery. This case is a 37-year-old male diagnosed with a mature cystic IEST without dysraphism or previous surgical interventions.

A Rare Case of Isolated Lower Segment Transverse Sacral Fracture in a 12-Year-Old Girl and Its Management by Fixation with K-Wire.

Background: Isolated lower segment sacral fracture is very rare. To the best of our knowledge, there is only one case report of S4 stable fracture that was treated conservatively.

Case Description: Here, we report a 12-year-old girl who sustained an isolated S5 fracture with anterior displacement of S5 and coccyx on S4.

Fast retreat of Zachariæ Isstrøm, northeast Greenland.

After 8 years of decay of its ice shelf, Zachariæ Isstrøm, a major glacier of northeast Greenland that holds a 0.5-meter sea-level rise equivalent, entered a phase of accelerated retreat in fall 2012. The acceleration rate of its ice velocity tripled, melting of its residual ice shelf and thinning of its grounded portion doubled, and calving is now occurring at its grounding line.