The full collapse happened in the early morning hours of March 12, according to AFP. The arch bridge collapses and reforms periodically.
Pine Island Glacier is one of the largest ice streams in Antarctica.
Pine Island Glacier flows at rates of up to m per year2. It is of interest to scientists because it is changing rapidly; it is thinning, accelerating and receding3, all of which contribute directly to sea level, and its future under a warming climate is uncertain.
Pine Island Glacier is buttressed by a large, floating ice shelfwhich helps to stabilise the glacier, but this ice shelf is itself thinning and recently calved a huge iceberg.
Just watch how fast the ice flows in the video below, and Glacier melt especially how the ice speeds up when it reaches the floating ice shelf.
The white dots show how particles move with the ice which are initially randomly distributed over the ice surface. Colours in addition show the flow speed. By Youtube user pikff1. An inaccessible location Autosub near the ice from http: It is remote from any research bases, so flying there means making multiple short flights, making fuel depots to allow scientists to hop to the location.
Low lying cloud often makes flying hazardous. The ice stream is heavily-crevassed and dangerous, so walking on it is difficult. Sea ice keeps ships away, making it difficult to access the ice stream from the ocean.
However, scientists have several ingenious ways in which they can observe changes to this fragile, important ice stream.
They can measure changes in ice extent and thinning from satellites4,5, and they have fired javelins loaded with sensors onto the ice surface, into places with too many crevasses for people to travel. Can you identify the ice shelf? You can also see how the surface of both the ice stream and ice shelf is heavily crevassed, making it difficult to walk on the surface of the ice.
Simplified cartoon of a tributary glacier feeding into an ice shelf, showing the grounding line where the glacier begins to float. Pine Island Glacier drains much of the marine-based West Antarctic Ice Sheet, and it has a configuration susceptible to rapid disintegration and recession.
The ice sheet in this area is grounded up to m below sea level, making it intrinsically unstable6 and susceptible to rapid melting at its base, and to rapid migration of the grounding line up the ice stream7 see Marine Ice Sheet Instability.
The images below show how much of the West Antarctic Ice Sheet, especially around Pine Island Glacier, is grounded well below sea level. Isostatically corrected Antarctic continent with the ice removed. Global Warming Art Project. The grounding line receded by more than 20 km from to The ice stream is steepening, which increases the gravitational driving stress, helping it to flow faster, and there is no indication that the glacier is approaching a steady state The grey bars at the right indicate the best estimate and likely range of temperatures.Summary.
The melt on a glacier is a function of the positive degree day sum, and the amount of melt that occurs per degree day. The depth of snow melted therefore = . Timelapse is a global, zoomable video that lets you see how the Earth has changed over the past 32 years.
It is made from 33 cloud-free annual mosaics, one for each year from to , which are made interactively explorable by Carnegie Mellon University CREATE Lab's Time Machine library, a technology for creating and viewing zoomable and pannable timelapses over space and time. May 24, · Glacier National Park’s eponymous ice formations lost more than a third of their area between and See how every glacier in the park has retreated over 50 years.
Embark on this helicopter glacier kayaking tour from Vancouver or Abbotsford and experience the pinnacle of British Columbia’s backcountry adventures. Inside the glacier-cave: Amazing underground chamber with giant ice slides that never melt metre deep cave is beneath the Rocky Mountains.
Get daily satellite images and information about melting on the Greenland ice sheet. We post analysis periodically as conditions warrant.
Click an image for a high-resolution version. May and June were markedly cooler than the average, although total melt-day area for the ice sheet is near average.