Now assume that the rate
of melting of those ice sheets is doubling every 5 or 10 years, as the sparse data seems to imply.
«A separate study in today's issue of Science reports that sea levels are probably rising slightly because
of a melt of ice sheets.
Not exact matches
A team
of top scientists explores the fastest warming place on Earth, as they examine the rapidly
melting ice sheet of the West Antarctic Peninsula.
Impacts
of thermal expansion and
melting mountain glaciers can be predicted with moderate confidence, but more uncertainty remains in the potential behavior
of polar
ice sheets.
The second cause
of sea level increase is the
melting of land
ice — such as glaciers and
ice sheets.
There are more, however, including the amount
of sunlight an
ice sheet is able to reflect; the larger an
ice sheet, the more sunlight is reflected, but the smaller an
ice sheet, the more ocean there is surrounding the
ice sheet to absorb the sunlight which in turn heats up the surrounding waters increasing the
melt which decreases the size
of the
ice sheet which in turn... and so goes the cycle.
Further, the less time an
ice sheet has to create new layers
of ice each winter, the less strong
ice is created and built into centuries
of previous strong sea
ice, leaving ever more vulnerable and easy - to -
melt sea
ice.
Apple Pastry 1
sheet of puff pastry (thawed) 2 Granny Smith Apples (peeled, cored and sliced) 2 TBS sugar 1 tsp cinnamon 2 TBS butter (or butter substitute)
melted 2 TBS maple syrup Vanilla
Ice Cream to serve it with
Things I changed: - cut the sugar by about half, using mostly dark brown sugar for the molasses kick - scratched the nutmeg and allspice but added about 1/3 extra
of all
of the other spices and also added nearly a tsp
of ground cardamon - replaced the veggie oil with
melted leaf lard - scratched the raisins - baked it on a deep
sheet for only ~ 20 minutes - just barely until firm to the touch - then cut that
sheet into three layers - replaced the
icing with my own 16 ounce cream cheese, 8 ounce butter, ~ 6 ounce heavy cream, ~ 5 ounce honey, 1 tsp vanilla combo - toasted the coconut before dressing the cake.
Or just put salt on one side
of the
sheet of ice to see if it
melts faster.
According to the Center for Remote Sensing
of Ice Sheets (CReSIS), an NSF Science and Technology Center led by the University of Kansas, the melt from Greenland's ice sheet contributes to global sea level rise at a rate of 0.52 millimeters annual
Ice Sheets (CReSIS), an NSF Science and Technology Center led by the University
of Kansas, the
melt from Greenland's
ice sheet contributes to global sea level rise at a rate of 0.52 millimeters annual
ice sheet contributes to global sea level rise at a rate
of 0.52 millimeters annually.
This magma plume isn't an alternative possible cause
of recent upticks in
melting along the West Antarctic
Ice Sheet attributed to human - generated climate change.
The plume has been a factor in the
ice sheet's behavior throughout its history, and recent surges in
melting are the result
of all the additional heat humans have pumped into it.
Temperatures soaring above 10 °C caused more than a tenth
of the island's vast
ice sheet to start
melting last week — a month before significant
melt usually begins.
Considering that the Greenland and Antarctic
ice sheets span more than 1.7 million and 14 million square kilometers, respectively, while containing 90 %
of the world's freshwater
ice supply,
melting of ice shelves could be catastrophic for low - lying coastal areas.
Over hundreds or thousands
of years, vast
ice sheets can
melt away, further decreasing the planet's reflectivity.
Willis is leading a new mission to study the effects
of warming oceans on the
melting of the Greenland
Ice Sheet.
That question is central to understanding the effects
of ice sheet melting on ocean water properties, circulation, and biological systems, on scales from local to basinwide.
While satellite measurements and climate models have detailed this recent
ice loss, there are far fewer direct measurements
of melt collected from the
ice sheet itself.
Parts
of the massive
ice sheet once considered stable have been shown to be
melting in new research
Computer model simulations have suggested that
ice -
sheet melting through warm water incursions could initiate a collapse
of the WAIS within the next few centuries, raising global sea - level by up to 3.5 metres.»
«The influence
of distant forest fires on
melt events on the Greenland
ice sheet is inherently challenging to demonstrate and these clear chemical results provide another line
of evidence for this connection,» said Diane McKnight, a CU Boulder professor and a co-author
of the study.
In comparison, it took the Jakobshavn Isbræ
ice stream — a southwest Greenland region with a fast - moving glacier that has been a focal point
of scientific examination
of ice sheet melt — 150 years to retreat 35 kilometers, said Khan.
Maximum temperature extremes were also associated with widespread
melting of the Greenland
ice sheet.
Estimated changes in the mass
of Greenland's
ice sheet suggest it is
melting at a rate
of about 239 cubic kilometres (57.3 cubic miles) per year.
For example, heat waves were particularly severe, droughts were extensive in tropical forests, and
melting of the Greenland
ice sheet accelerated in association with shifts in the 8 - day maximum temperature.
The Greenland
ice sheet occupies about 82 %
of the surface
of Greenland, and if
melted would cause sea levels to rise by 7.2 metres.
The hope is that the cables could reveal secrets about what's happening underneath the
ice sheets, especially about
melting at the so - called grounding line, the place where the bottom
of an
ice sheet meets the slightly warmer ocean.
Today's red deer, which recolonized Europe after the
ice sheet melted about 12,000 years ago, fall into three or four distinct lineages that likely correspond to separate southern regions to which the deer had retreated during the height
of the
ice age, Stanton says.
The
ice sheet is made up
of snow that falls and never
melts, but rather remains year after year and is gradually compressed into
ice.
Recent modelling by researchers from the Potsdam Institute for Climate Impact Research in Germany, as well as studies
of past climate, suggest that the planet will soon have warmed enough to
melt Greenland's
ice sheet entirely — if it hasn't already become warm enough.
One way to assess the health
of ice sheets is to look at their balance: when an
ice sheet is in balance, the
ice gained through snowfall equals the
ice lost through
melting and iceberg calving.
At present the
ice sheet is grounded on underwater islands, which insulate some
of the
ice from the
melting effect
of the seawater upon which the rest
of the
sheet floats.
This allowed them to calculate the redistribution
of mass on Earth's surface due to the
melting of the Greenland and Antarctic
ice sheets and mountain glaciers, and model the shift in Earth's axis.
The team stresses that even a little warming could cause irreversible
melting of ice sheets and turn dense Amazon forests into dry savannah grassland.
Operation IceBridge, NASA's airborne survey
of polar
ice, is flying in Greenland for the second time this year, to observe the impact
of the summer
melt season on the
ice sheet.
Since there are many techniques to measure the MPP, we can keep using its drift to gauge the extent
of ice -
sheet melting — even in between the end
of the ageing GRACE mission and the launch
of the next generation
of gravity - measuring satellites, says Chen.
In 2015,
melting spiked again to reach more than half
of the Greenland
ice sheet.
A hundred kilometers wide, this
ice sheet, unlike most
of its peers, is actually growing instead
of melting, because it has slowed its flow toward the sea in recent decades.
What they found, Hansen says, is that
melting ice sheets in Greenland and Antarctica could inject enough fresh water into the seas to slow the formation
of two key water masses: the North Atlantic Deepwater and the Antarctic Bottom Water formations.
• In Antarctica, Greenland and other places where big
ice sheets are surrounded by the ocean, sometimes big chunks
of ice fall into the ocean after they have started to
melt.
«Very old
ice probably exists in small isolated patches at the base
of the
ice sheet that have not yet been identified, but in many places it has probably
melted and flowed out into the ocean.»
Its location is wandering as a result
of the
melting of glaciers and
ice sheets — a finding which suggests that monitoring the position
of the poles could help us track the decline
of ice sheets.
The paper also describes an atmosphere - ocean modeling study
of feedback loops caused by
ice sheet melting under 2 °C conditions.
Yet the darkening
of Greenland around its periphery remains a source
of concern because it contributes to making the
ice sheet melt away faster.»
As the
ice sheets melt, there will not only be more water in the oceans, but the positions
of those hills and valleys will shift.
A new study says that climate - induced feedback loops could lead to a change in ocean stratification and the more rapid
melting of ice sheets.
«The fact that a large portion
of the western flank
of the Greenland
ice sheet has become dark means that the
melt is up to five times as much as if it was a brilliant snow surface.»
Alaskan and the Canadian Arctic land - based glacier
melt ranks with that
of the Greenland
Ice Sheet as important contributors to global sea - level rise that is already underway.
The Dark Zone is a literally dirty belt
of the
melting area — the ablation zone —
of the
ice sheet.