Sentences with phrase «though sea ice levels»

Abrupt summer sea ice decline has not affected polar bear numbers as predicted: even though sea ice levels dropped to mid-century levels in 2007, the expected decimation of polar bears failed to occur.

Not exact matches

If the great ice sheets of Greenland and Antarctica lose enough ice to raise sea level a metre or more, though, it would take thousands of years for snowfall to build up the ice sheets again.

More than 12,000 years ago, Pine Island and Thwaites glaciers were grounded on top of a large wedge of sediment, and were buttressed by a floating ice shelf, making them relatively stable even though they rested below sea level.

May and June this year also saw record low sea ice levels, though the decline eased off in July.

The fact that ice sheets will respond to warming is not in doubt (note the 4 - 6 m sea level rise during the last interglacial), but the speed at which that might happen is highly uncertain, though the other story this week shows it is ongoing.

But roughly speaking, if you do an LGM run and only reduce sea level, put in the ice sheets, change the vegetation, add some dust (though that one is still rough), then you get about 50 % the way you want to go.

Thus, for every 1 % increase in local sea level, there is a ~ 5 % increase in ice flux through the grounding line (though this may be higher if the bed is slippery near the grounding line, see Tsai et al. 2015).

It is also possible for cold climates to increase chemical weathering in some ways, by lowering sea level to expose more land to erosion (though I'd guess this can also increase oxydation of C in sediments) and by supplying more sediments via glacial erosion for chemical weathering (of course, those sediments must make it to warmer conditions to make the process effective — downhill and downstream, or perhaps via pulsed ice ages -LRB-?)-RRB-.

In this regard, I would observe that at least one important AGW effect, rising sea level, does not depend on a specific regional outcome so much as on global mean T. (At least, I think this is so (because my understanding is that most of the rise comes from lower density of warmer water, not from melting ice sheets — though again, not 100 % sure on this point)-RRB-.

Rick and her colleagues Max Boykoff and Roger Pielke studied 20 years of newspaper archives (1989 — 2009) and found that journalists frequently quoted the most recent IPCC sea - level rise projections even though the majority of articles were about only one source of sea - level rise — usually melting ice — or one particularly high - profile scientific paper.

This thermal expansion was the main driver of global sea level rise for 75 - 100 years after the start of the Industrial Revolution, though its relative contribution has declined as the shrinking of land ice has accelerated.

In contrast, the actual science shows something quite different: though summer sea ice since 2007 has declined to levels not predicted until 2040 - 2070, there has been virtually no negative impact on polar bear health or survival, a result no one predicted back in 2005.

Recent evidence of faster rates of global sea - level rise suggests that these projections may be too low.3, 4,5 Given recent accelerated shrinking of glaciers and ice sheets, scientists now think that a rise of 2.6 feet (80 centimeters) is plausible — and that as much as 6.6 feet (2 meters) is possible though less likely.16

Though the Tibetan earthquake was going to happen at some time, it is possible that changes in ice loading on Himalayan glaciers, changes in water volume outflows in the annual Asian monsoon, and sea level rise adding pressure to the geological plates below coastlines — especially in low - lying Bangladesh — had an impact.

Melting polar ice, rising sea levels, floods, droughts and hurricanes are all in there — even though these are largely contradicted not just by the actual evidence, but even by the much more cautious contents of the vast technical reports they were meant to be «synthesising».

We're leaving Europe's shoreline now, though it would have extended farther west back in the icy periods when the sea level was a lot lower because ice sheets locked up so much water.

Using climate models, Radic found that these smaller mountain glaciers and ice caps may contribute more than 4.5 inches (12 centimeters) to world sea level rise by the beginning of the next century, even though they contain less than one percent of all water on Earth bound in glacier ice.

Oh, I almost forgot topographic changes, though they a few orders of magnitude slower (not counting ice sheets and associated sea level here).

According to the Danish Meteorological Institute Arctic sea ice is well above levels seen in the last three years though, per NSIDC, it's about two sigma below the 1979 - 2000 average.

Mooney then explains why Will's focus on global sea ice levels in 1979 compared to today is misleading and unimportant (even though Will did get his facts wrong).

Two - Thirds West Antarctic Ice Sheet = 3.3 Meters Sea Level Rise What's more, though it's not likely to disappear entirely, about two - thirds of the West Antarctic Ice Sheet could well melt — at some point past 2100 — alone contributing about 3.3 meters to global sea leveSea Level Rise What's more, though it's not likely to disappear entirely, about two - thirds of the West Antarctic Ice Sheet could well melt — at some point past 2100 — alone contributing about 3.3 meters to global sea levesea levels.

At the same time Antarctic sea - ice has been more stable, though most areas have been at very low levels since autumn 2016.

In fact, it is looking more and more as though the second assumption is flawed and we may see 5 meters of sea level rise this century owing to rapid destruction of ice sheets.

The fact that ice sheets will respond to warming is not in doubt (note the 4 - 6 m sea level rise during the last interglacial), but the speed at which that might happen is highly uncertain, though the other story this week shows it is ongoing.

Doubtless melting at current rates would continue (though depending on ice dynamics a new steady state could emerge) but that does not seem very serious; it is only a fraction of current sea level rise.