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This enormous temperature jump could have huge impacts. On 18th March 2022 scientist at Concordia research station on the east side of Antarctica. To put this leap in perspective, that would take a normal spring day in the UK, up to some of the highest temperatures ever recorded on planet earth.
Continue reading “World record temperature jump recorded in Antarctica 38.5”
The Ross ice shelf is vast, covering 182,000 square miles, it is only slightly smaller than France, and yet a study has shown, that the whole ice shelf can move 40 cm in just 10 minutes. These were generally caused by slips in the Whillans Ice Sheet, which is one of just a few ice flows into and through the area.
The whole shelf was found to move 6-8cm once or twice a day, triggered by these flows moving. This could be the cause of both icequakes, and fractures running through the ice (fractures are important, as they make it more likely that a section of the ice will break off the edge of Antarctica and head into the ocean. While this ice can, on occasion survive a long time – A23a broke of Antarctica in 1986 and has been floating free for much of the time since (except for a decade or so when it grounded); it was estimated to be 400m thick and weigh in at nearly 1 trillion tonnes.
This is a problem for a simple reason. Unlike the north pole, there is land under the ice in Antarctica. This means that while in the north pole, the ice sheet is already in the sea, so its melting cannot increase sea level, Antarctic ice all does increase sea levels.
The Ross ice shelf is known to have collapsed 120,000 years ago during the last interglacial period, and contains enough ice to raise sea levels by 11.5m (this would also cause another 2m of sea level rise because of the glaciers which would no longer be held back).
A Dutch startup, is trialling mitigating this in the Arctic, by pumping sea water onto the ice. This then freezes, thickening the ice. It is possible that this might work in the short term, however, what is clear, is that the only long-term solution, is to stop burning fossil fuels, so as to halt the heating of the earths climate.
So, if the melting of this ice sheet is now unaviodable what would its impacts be? Well this ice sheet has enough volume of water, to raise global water levels by 5m. While this might not sound like much, there are 16 countries around the world who would loose more than 10% of their area, and the country at the top – the Netherlands, would loose roughly 55% of its landmass. It is estimated that by 2030 5.4% of the worlds population or 460 million people will live in this zone that will cease to exist.
Unfortunately, there is little positive to write, as the author suggests that this is now inevitable. Drastic cutting now, is all that can stop this damage at 5m raise in sea levels. Without it, what are we going to see? 100m rise in sea levels? This would require us finding space for 1/3 or the human population, on the remaining land, as their land will disappear beneath the seas.
Why is this not considered a major disaster?
Covering 1500 square miles, the iceberg grounded in 1986 on the ocean floor, but now it is free it is heading into the Southern ocean.
Carving like this, is quite natural. Unfortunately, though this is occurring far more often, and this is a sign of global warming.
It should be noted that as this was frozen sea water, it should not raise ocean levels, as the water was in the ocean before it froze and will return as it melts.
The fear is that, with the Tonga eruption, this larger than normal hole might do extra damage to the vast store of ice on Antactica.
Why is this concerning?
Well, given the Antarctic and the Greenland icesheet has enough ice to raise sea levels by 65m worldwide. This means a 5% melt in Antarctica would raise sea levels by several meters (even without any melting of Greenland at all).
This quantity of sea level rise, would threaten cities such as Shanghai and London, to large parts of Florida and Bangladesh to total nations that would be wiped out, such as Maldives.
This means that while it may well take a century and increased carbon emissions for all of the ice at the poles to melt, it could threaten human populations long before this occurs.
Around 410 million people on earth live within just 2m of the height of the sea. This is roughly 5% of human population. Currently, there are issues with just 2% immigration into the UK. A sea level rise of 2m would likely trigger an order of magnitude more to move here, Western Europe, USA and other countries. We are all going to be hit hard, but some far harder than others.
Under the Biden administration in the USA, science is not ignored. There were a handful of animals that were listed as endangered in the rest of the world, but the listing was not changed in the USA because of the political impact. Thankfully, that time is at least over at the current time. The Emperor penguins are obviously threatened by global warming given there uses of extreme areas of the Antarctic.
The population that was filmed for the popular film “March of the Penguin” has halved in size in the last 50 years. These sorts of issues are predicted to lead to a 99% reduction in population by the end of the century, should these changes not lead to the total extinction.
Researchers looking at the Antarctic sea floor, have discovered a vast and completely unprecedented colony of ice fish. Consisting of as much as 60 million individual nests, they were spread out over an area of the floor similar to the size of London.
Before this discovery, the biggest colony contained just 60 nests. This area was first looked at, because a natural upwelling of water from the depths, means that the temperature here is usually about 2 degrees above the surrounding area. It is thought that the Wendell sea (where this colony was discovered) is likely to have an ecosystem that relies in some way on these fish.
It is astounding to find such a large thriving species in the wild, and shows that there is still we know very little about.
There are species of penguin found in New Zealand. However Adelie penguins are not, they live in Antarctic waters. As such there is some confusion as to how one ended up there.
Fin whales were driven near to extinction in these waters a century ago, yet they have returned. A huge gathering of 1000 whales is not a regular site.
Cracks and fissures have appeared on Thwaites glacier, leading to fears of it collapsing. If it were to collapse, this glacier alone could raise sea levels by half a meter.
The issue with this glacier, is that it essentially operates as a dam for the vast ice floes behind it.
Of particular alarm, thwaites glacier operates a bit like a cork, blocking a whole collection of glaciers from collapsing. It is feared that with the collapse of Thwaites glacier, a large amount of the Antarctic ice shelf might slide into the sea – leading to global sea level rises of several meters.
To put this in perspective, if all the west Antarctic glaciers collapse, no coastal city in the world would escape. Over time every single one would be swamped and lost back to the sea. It was thought (until recently) that this glacier loss would take centuries.
In other words, what this does is make it clear – it is not just our children and grandchildren that are going to have to do something about global warming. If we don’t correct our behaviour quickly, we will make life far harder for ourselves as well
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