Sentences with phrase «calving fronts in»

In the summer of 2008, Rignot's team measured salinity, temperature and current speeds near four calving fronts in three fjords in western Greenland.

According to the NASA map, the retreat of the calving front in the period 1929 - 1953 (24 years) was as large as the retreat in the period 1953 - 2003 (50 years).

Not exact matches

Even relatively large calving events, where tabular ice chunks the size of Manhattan or bigger calve from the seaward front of the shelf, can be considered normal if the ice sheet is in overall balance.

RETREATING ICE Jakobshavn Glacier in western Greenland (its front edge, where ice is calving into the ocean, shown here in 2012) is one of the world's fastest - shrinking glaciers.

«As the glacier's calving front retreats into deeper regions, it loses ice — the ice in front that is holding back the flow — causing it to speed up,» Joughin clarifies.

The calving front of the glacier is now located in a deeper area of the fjord, where the underlying rock bed is about 1300 metres below sea level, which the scientists say explains the record speeds it has achieved.

Unlike the great ice sheet of Antarctica, the Greenland ice sheet is melting both on its surface and also at outlet glaciers that drain the ice sheet's mass through deep fjords, where these glaciers extend out into the ocean and often terminate in dynamic calving fronts, giving up gigaton - sized icebergs at times.

More specifically, using digital scans of paper maps based on aerial imagery acquired by the U.S. Geological Survey, along with modern - day satellite imagery from a variety of platforms, the authors digitized a total of 49 maps and images from which they calculated changes in the terminus positions, ice speed, calving rates and ice front advance and retreat rates from 34 glaciers in this region over the period 1955 - 2015.

I suppose that may have to do with in - between advancing of the glacier's calving front?

The reduced resistive force at the calving front is then propagated up glacier via longitudinal extension in what R. Thomas calls a backforce reduction (Thomas, 2003 and 2004).

There has also been an alarming increase in the number of photographs of meltwater draining into a moulin somewhere on the GIS, often near Swiss Camp (35 km inland from the calving front).

On Jakobshavn the acceleration began at the calving front and spread up - glacier 20 km in 1997 and up to 55 km inland by 2003 (Joughin et al., 2004).

That acceleration began at the calving front and spread upglacier 20 km in 1997 and up to 55 km inland by 2003 (Joughin et al., 2004).

The Petermann Glacier lost a substantial area, 29 km2 due to calving this summer (Box 2008c), and a crack well back of the calving front indicates another 150 km2 is in danger.

The measurements are some distance from the calving front and may not have resulted in warming under the floating section.

In part because the large Jakobshavn Isbrae moves so quickly, it is difficult to tell the glacier ice (right and top) from the many icebergs it has calved off (center front) into the fjord.

Mass balance transfer to the calving front is a slow process with a large lag time (centuries) and is not capable of playing a meaningful role in the recent relatively large and sudden glacier accelerations (Pfeffer, 2007).

The small protruding glacier tongue in the lower part of the picture belongs to Glacier Pierre Curie, which now ends a kilometre from the sea but in 1963 had a calving front about 600 m wide.

The thermocline adjacent in the sea adjacent to the glacier calving front (where ice is discharged) lowered by 250 meters in the austral summer of 2012.

The acceleration to worry about is from changes in the calving front, and the resultant retreat and acceleration that has been observed on almost all Greenland marine terminating outlet glaciers.