Icebergs calving into the sea are a major source of Greenland's ice loss.
Ocean waters melting the undersides of Antarctic ice shelves, not
icebergs calving into the sea, are responsible for most of the continent's ice loss, a study by UC Irvine and others has found.
Not exact matches
A 70 - mile - long crack is currently causing Larsen C to
calve a Delaware - sized
iceberg into the Southern Ocean.
This
iceberg, named UK211, had survived for three years since
calving off the Larsen C ice shelf 385 kilometers south, but now it was drifting
into warm climates north of the peninsula.
A new study has found that the massive Laurentide ice sheet that covered Canada during the last ice age initially began shrinking through
calving of
icebergs, and then abruptly shifted
into a new regime where melting on the continent took precedence, ultimately leading to the sheet's demise.
A new study shows how huge influxes of fresh water
into the North Atlantic Ocean from
icebergs calving off North America during the last ice age had an unexpected effect — they increased the production of methane in the tropical wetlands.
At its
calving front, where the glacier effectively ends as it breaks off
into icebergs, some of the ice melts while the rest is pushed out, floating
into the ocean.
How far the future Larsen C
iceberg will drift depends on whether it remains intact after
calving, or quickly breaks up
into smaller pieces.
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.
This accelerates the glacial flow and the
calving of
icebergs into the surrounding ocean.
«Once ice loss through the
calving of
icebergs goes beyond the passive shelf ice and cuts
into the safety band, ice flow towards the ocean will accelerate, which might well entail an elevated contribution to sea - level rise for decades and centuries to come.»
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.
The glacier was renowned for an exposed ice tongue poking 40 kilometres out from the Antarctic continent but in early 2010 a 97 - kilometre long
iceberg smashed
into Mertz, resulting in the
calving of a massive chunk of the ice tongue.
However, researchers believe that the Columbia Glacier will stabilise again - probably in a few years - once its terminus retreats
into shallower water and it regains traction, which should slow the rate of
iceberg calving.
It is driven by poorly understood processes occurring at the ice - ocean interface, such as subglacial discharge
into the ocean, turbulent plume dynamics, submarine melting, and
iceberg calving.
Also there is an article in an early National Geographic centering on a lagoon, I think in Alaska, that had 5 glaciers joining and exiting the lagoon to calf
icebergs in the ocean, 20 years later there were 5 distinct glaciers now melted back,
calving into the lagoon.
Or the news from Antarctica this past May, when a crack in an ice shelf grew 11 miles in six days, then kept going; the break now has just three miles to go — by the time you read this, it may already have met the open water, where it will drop
into the sea one of the biggest
icebergs ever, a process known poetically as «
calving.»
If they melt or
calve (break up), however, this discharges water and
icebergs into the ocean, contributing to global sea - level rise.2, 3,4
Satellite images reveal clue to the hidden cause of fractures in Antarctic shelf ice that are
calving huge
icebergs into the south polar seas.