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Post by ratty on Sept 26, 2021 7:47:04 GMT
Antarctica ice extent has tanked in last few weeks, was looking so strong! Looks to me like a " we can't have THAT" moment. Blowtorch on the scale?
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Post by code on Oct 2, 2021 11:16:48 GMT
South Pole posts most severe cold season on record, a surprise in a warming world While the rest of the world sizzled, the South Pole shivered with an average temperature of minus-78 degrees over the past six months. Ted Scambos, a senior research scientist at the University of Colorado, wrote in an email that the Antarctic climate is extremely sensitive to high-altitude winds and Pacific Ocean conditions and prone to rapid change. He pointed out that its sea ice, which was close to a record high at the end of August tanked to “to one of the lowest extents for this time of year that we’ve seen” by the end of September. To evaluate what’s happening with the climate of Antarctica, one must look beyond a seasonal snapshot, scientists said. “One cold winter is interesting but doesn’t change the long term trend, which is warming,” Eric Steig, a professor of atmospheric sciences at the University of Washington, wrote in an email. Not only is Antarctica warming over the long-term, but its ice is rapidly melting, contributing to sea-level rise:
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Post by walnut on Oct 2, 2021 16:13:16 GMT
The world is not warming, per unadjusted surface temp data.
But the cold South Pole temps might surprise due to the very recently decreasing antarctic sea ice extent.
Once again, we don't seem to really have a handle on what drives sea ice extent.
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Post by neilhamp on Oct 2, 2021 19:12:31 GMT
Quite agree Antarctic temperature dropping like a stone. From Climate4you
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Post by acidohm on Oct 3, 2021 6:22:16 GMT
This article may offer some explanation. www.carbonbrief.org/guest-post-deciphering-the-rise-and-fall-of-antarctic-sea-ice-extentAlthough ice extent diagrams show continuous white, as if a solid sheet of ice exists, the reality is much of the extent is floes. 15% of water containing floes attributes this area to the extent schematic. Wind can compact or disperse the floes changing the extent overnight, even tho the quantity of ice hasn't changed proportionally.
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Post by nonentropic on Oct 3, 2021 17:38:29 GMT
Acid the 15% is not particularly high but more important is the surface is without waves as a consequence of the that ice.
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Post by blustnmtn on Oct 7, 2021 12:14:41 GMT
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Post by acidohm on Oct 13, 2021 6:21:16 GMT
Not Antarctic ice....but enso 4. Weirdly similar..... Apparently in recent nina events its been hard to cool region 4...atm its practically leading the way!
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Post by acidohm on Oct 14, 2021 5:11:30 GMT
So where's it going now???
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Post by blustnmtn on Oct 23, 2021 12:06:00 GMT
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Post by Sigurdur on Nov 9, 2021 23:22:37 GMT
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Post by ratty on Nov 25, 2021 10:28:06 GMT
From April, 2019: China unchecked in AntarcticaWhat is China doing down there? Truth is, we don’t know for sure.They have been busy; they probably appreciate the fact that they don't have to make it bigger.
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Post by missouriboy on Nov 25, 2021 16:42:33 GMT
From April, 2019: China unchecked in AntarcticaWhat is China doing down there? Truth is, we don’t know for sure.They have been busy; they probably appreciate the fact that they don't have to make it bigger. They are looking for a hidey hole for when the Mandate of Heaven evaporates?
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Post by blustnmtn on Dec 12, 2021 13:06:20 GMT
Interesting paper: www.nature.com/articles/s41467-021-27053-6.pdf“Emerging ice-sheet modeling suggests once initiated, retreat of the Antarctic Ice Sheet (AIS) can continue for centuries. Unfortunately, the short observational record cannot resolve the tipping points, rate of change, and timescale of responses. Iceberg-rafted debris data from Iceberg Alley identify eight retreat phases after the Last Glacial Maximum that each destabilized the AIS within a decade, contributing to global sea-level rise for centuries to a millennium, which subsequently re-stabilized equally rapidly. This dynamic response of the AIS is supported by (i) a West Antarctic blue ice record of ice-elevation drawdown >600 m during three such retreat events related to globally recognized deglacial meltwater pulses, (ii) step-wise retreat up to 400km across the Ross Sea shelf, (iii) independent ice sheet modeling, and (iv) tipping point analysis. Our findings are consistent with a growing body of evidence suggesting the recent acceleration of AIS mass loss may mark the beginning of a prolonged period of ice sheet retreat and substantial global sea level rise.”
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Post by walnut on Dec 12, 2021 14:41:50 GMT
Interesting paper: www.nature.com/articles/s41467-021-27053-6.pdf“Emerging ice-sheet modeling suggests once initiated, retreat of the Antarctic Ice Sheet (AIS) can continue for centuries. Unfortunately, the short observational record cannot resolve the tipping points, rate of change, and timescale of responses. Iceberg-rafted debris data from Iceberg Alley identify eight retreat phases after the Last Glacial Maximum that each destabilized the AIS within a decade, contributing to global sea-level rise for centuries to a millennium, which subsequently re-stabilized equally rapidly. This dynamic response of the AIS is supported by (i) a West Antarctic blue ice record of ice-elevation drawdown >600 m during three such retreat events related to globally recognized deglacial meltwater pulses, (ii) step-wise retreat up to 400km across the Ross Sea shelf, (iii) independent ice sheet modeling, and (iv) tipping point analysis. Our findings are consistent with a growing body of evidence suggesting the recent acceleration of AIS mass loss may mark the beginning of a prolonged period of ice sheet retreat and substantial global sea level rise.” Yes I've been wondering what has suddenly changed down there. Did a big piece break off and float away...
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