This relatively small outlet glacier is just one of hundreds (there are many much larger) that move ice from the interior of the Greenland ice
sheet out to the ocean.
Not exact matches
Enkelmann appreciates the challenge of collecting samples here because this range has the highest peaks of any coastal mountain range and is only 20 kilometers from the Pacific
Ocean, but she points
out that it is a tough area
to study because of the big ice
sheets.
For scientific purposes, the Antarctic ice
sheet is often divided into catchment basins so that comparative measurements can be taken
to work
out how the ice in each basin is changing and discharging ice
to the
oceans.
«If protective ice shelves were suddenly lost in the vast areas around the Antarctic margin where reverse - sloping bedrock (where the bed on which the ice
sheet sits deepens toward the continental interior, rather than toward the
ocean) is more than 1,000 meters deep, exposed grounding line ice cliffs would quickly succumb
to structural failure as is happening in the few places where such conditions exist today,» the researchers point
out.
To visualise how he would approach the filming of the climactic battle, DGA Quarterly recounts how he laid
out a blue
sheet on his office floor for the
ocean and with a fishing line towed two little square - rigger ship models around the room, blew wind on them from a fan, and filmed it with a lipstick camera.
Because the drains
out of the various bathtubs involved in the climate — atmospheric concentrations, the heat balance of the surface and
oceans, ice
sheet accumulations, and thermal expansion of the
oceans — are small and slow, the emissions we generate in the next few decades will lead
to changes that, on any time scale we can contemplate, are irreversible.
It was said above that the
ocean is warming just like the land (& air and ice
sheets / glaciers), that the heat in the
ocean dwarfs that in the land and air, that the warming is due
to the net solar imbalance (solar in, less LW
out - no mention of CO2.)
In our paper, based on data from Jason Box from the Geologic Survey of Denmark and Greenland, we estimated that the Greenland ice
sheet has already come
out of equilibrium since the beginning of the 20th century and has since added about 13,000 cubic kilometers of meltwater
to the
ocean.
I haven't had time
to read all of these postings — let alone Jim Hansens DIRE piece (though I DID just download it and I will do so; and Thank You, by the way, for telling the WHOLE SCARY Truth Dr. Hansen); but,
out of what I did scan, I didn't seem
to notice any references having been made in regards
to the possibility that the Fresh Meltwater comming off of the Greenland Ice
Sheets — and them plunging striaght
to the bottom of the North Atlantic
Ocean — could shut down the so - called «Atlantic Conveyor».
The West Antarctic Ice
Sheet (WAIS) is
out of balance because it is losing significant amounts of ice
to the
ocean, with the losses not being offset by snowfall.
On the other hand, if by some chance and what ends up happening is totally independent of human activity, because it turns
out after all that CO2 from fossil fuels is magically transparent
to infrared and has no effect on
ocean pH, unlike regular CO2, say, but coincidentally big pieces of the ice
sheets melt and temperature goes up 7 C in the next couple of centuries and weather patterns change and large unprecedented extreme events happen with incerasing frequency, and coincidentally all the reefs and shellfish die and the
ocean becomes a rancid puddle, that could be unfortunate.
This small outlet glacier south of Jakobshavn Isbrae is moving ice from the interior of the ice
sheet out to the ice
sheet edge (top right), where the ice calves off into the
ocean.
Actually Fielding's use of that graph is quite informative of how denialist arguments are framed — the selected bit of a selected graph (and don't mention the fastest warming region on the planet being left
out of that data set), or the complete passing over of short term variability vs longer term trends, or the other measures and indicators of climate change from
ocean heat content and sea levels
to changes in ice
sheets and minimum sea ice levels, or the passing over of issues like lag time between emissions and effects on temperatures... etc..
It will take thousands of years for the ice
sheet to push its nose back
out into the
ocean.
Josh Willis, a lead NASA scientist for the Jason missions, which measure sea level rise from space and
Ocean's Melting Greenland (OMG), is a passionate communicator about human - caused global warming.Come listen
to a talk on what his team has found
out about the role of the
oceans in ice loss around the margins of the Greenland Ice
Sheet.