When the shelf broke, she and colleagues predicted, it would be the largest
calving event in decades.
There is a risk that Larsen C may eventually follow the example of its neighbour, Larsen B, which disintegrated in 2002 following a similar rift - induced
calving event in 1995.
Larsen B experienced a major iceberg -
calving event in 1995, followed by gradual retreat and then complete collapse seven years later.
You can see this amazing and rather chilling
calving event in action in the August 14 to August 16 satellite imagery comparison developed by Espen Olsen below:
Not exact matches
We have previously shown that the new configuration will be less stable than it was prior to the rift, and that Larsen C may eventually follow the example of its neighbour Larsen B, which disintegrated
in 2002 following a similar rift - induced
calving event.
Reporting this week
in the journal Nature Climate Change Dr Hogg and Dr Gudmundsson, examine the
events leading up to this dramatic natural phenomenon and discuss how
calving of huge icebergs affects the stability of Antarctic ice shelves.
Their article asserts that a
calving event is not necessarily due to changes
in environmental conditions and may simply reflect the natural growth and decay cycle of an ice shelf.
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.
Their observations show that since the
calving event, the berg has started to drift away from the Larsen - C, with open ocean clearly visible
in the ~ 5 kilometre gap between the berg and the ice - shelf.
«
In the ensuing months and years, the ice shelf could either gradually regrow, or may suffer further calving events which may eventually lead to collapse — opinions in the scientific community are divided,» Luckman sai
In the ensuing months and years, the ice shelf could either gradually regrow, or may suffer further
calving events which may eventually lead to collapse — opinions
in the scientific community are divided,» Luckman sai
in the scientific community are divided,» Luckman said.
A large
calving event at the Zachariae glacier made the news
in May 2013, and Khan and his team witnessed and filmed a similar
event in July.
Scientists have become growingly concerned about ice shelf collapse, and
in 2016, they proposed a new rule allowing for special study areas following collapse or massive
calving events.
If you missed my last sale post, Cole Haan's Fall
event is wrapping up, and my narrow -
calved Marina boots (now have these
in both black and gray) are still fully
in stock at sizable discount!
These observations are being collected
in our project over a period of several years as we build up a statistical data base of
calving events.
This is a 2001 image and the large rift beyond this that spread across the glacier
in 35 days or so, led to an iceberg
calving event.
If there were truly an increase
in glacier
calving events (due to warming or any other cause), the best evidence would be an increase
in iceberg numbers starting
in 1900 for example.
The record heat and melting coincided with a massive
calving event at Petermann Glacier, which also occurred
in mid July.
This extraordinary ice
calving event happened
in spite of it being the middle of winter at the South Pole.
For example a large 1987
calving event removed 100 years of ice accumulation from the Ross Ice Shelf
in just one day, an amount second only to the loss of the Larsen Ice Shelf.
That earlier warming was associated with a large
calving event of the Pine Island Glacier that likely occurred
in association with an EL Nino
event.
In October 2011, researchers flying in NASA's Operation IceBridge campaign made the first - ever detailed, airborne measurements of a major iceberg calving event while it was in progres
In October 2011, researchers flying
in NASA's Operation IceBridge campaign made the first - ever detailed, airborne measurements of a major iceberg calving event while it was in progres
in NASA's Operation IceBridge campaign made the first - ever detailed, airborne measurements of a major iceberg
calving event while it was
in progres
in progress.
Detecting glacialquakes is important because glaciers appear to accelerate after large
calving events.2 The frequency of glacialquakes — which has been rising since the late 1990s — has increased particularly since 2002.3
In fact, the number of quakes in 2005 was twice that of 2001.1 In late summer of 2005, glacial seismic activity was almost five times greater than in the winter months — most likely owing to seasonal changes in temperature.1,
In fact, the number of quakes
in 2005 was twice that of 2001.1 In late summer of 2005, glacial seismic activity was almost five times greater than in the winter months — most likely owing to seasonal changes in temperature.1,
in 2005 was twice that of 2001.1
In late summer of 2005, glacial seismic activity was almost five times greater than in the winter months — most likely owing to seasonal changes in temperature.1,
In late summer of 2005, glacial seismic activity was almost five times greater than
in the winter months — most likely owing to seasonal changes in temperature.1,
in the winter months — most likely owing to seasonal changes
in temperature.1,
in temperature.1, 3
Icebergs rarely form
in this manner;
in fact, large
calving events happen just once every 40 — 50 years.
These before - and - after photographs show Petermann Glacier
in July 2009, before the
calving event, and again
in...
Also,
in the movie, the Ilulissat Glacier
calving shown was attributed to the 2009
calving event.
This was the second large
calving event off this glacier
in just two years: the iceberg that broke away
in August 2010 was twice as large.
An important
event that occurred
in this region recently was the
calving of the Petermann Glacier, which took place 3 - 5 August 2010 (see Figures 3a and 3b).