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Old 4th August 2019, 06:10 PM   #1
Steve001
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Walloped by heat wave, Greenland sees massive ice melt

In this image taken on June 22, 2019 an aerial view of melt water lakes on the edge of an ice cap in Nunatarssuk, Greenland. Milder weather than normal since the start of summer, led to the UN's weather agency voicing concern that the hot air which produced the recent extreme heat wave in Europe could be headed toward Greenland where it could contribute to increased melting of ice. (AP Photo/Keith Virgo)
The heat wave that smashed high temperature records in five European countries a week ago is now over Greenland, accelerating the melting of the island's ice sheet and causing massive ice loss in the Arctic. Greenland, the world's largest island, is a semi-autonomous Danish territory between the Atlantic and Arctic oceans that has 82% of its surface covered in ice. The area of the Greenland ice sheet that is showing indications of melt has been growing daily, and hit a record 56.5% for ...
More > https://m.phys.org/news/2019-08-wall...ssive-ice.html
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Old 5th August 2019, 01:35 AM   #2
The Don
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[Denialist]Greenland, schmeenland....

It was a bit chilly here last Tuesday so clearly global warming is nonsense [/Denialist]

Seriously though, we need to distinguish between a one-off extreme weather phenomenon like the recent UK and Western Europe heat wave and long term climate trends - such as most of the hottest years in the last 150 years in the UK have been since the year 2000.

The US government, and increasingly the UK's, is in the hands of people who have a vested interest in ignoring science and marginalising experts in favour of gut feel and populism.
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Old 6th August 2019, 05:20 AM   #3
Steve001
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Originally Posted by The Don View Post
[Denialist]Greenland, schmeenland....

It was a bit chilly here last Tuesday so clearly global warming is nonsense [/Denialist]

Seriously though, we need to distinguish between a one-off extreme weather phenomenon like the recent UK and Western Europe heat wave and long term climate trends - such as most of the hottest years in the last 150 years in the UK have been since the year 2000.

The US government, and increasingly the UK's, is in the hands of people who have a vested interest in ignoring science and marginalising experts in favour of gut feel and populism.
I don't pay attention to the UK's policies but you are correct about the present US presidential administration's ignoring science.
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Old 6th August 2019, 04:36 PM   #4
Thor 2
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An extract from the article:

Quote:
A June 2019 study by scientists in the U.S. and Denmark said melting ice in Greenland alone will add between 5 and 33 centimeters (2 to 13 inches) to rising global sea levels by the year 2100. If all the ice in Greenland melted—which would take centuries—the world's oceans would rise by 7.2 meters (23 feet, 7 inches), the study found.
A rather vague estimate about sea level rise by the year 2100 (5 to 33 centimetres) and by contrast a rather precise estimate for the total rise if all the Greenland ice melted (7.2 metres).

I suppose the vagueness in the first instance is because of the uncertainty about how much ice will melt. Of course the ice does not necessarily have to melt, but just find its way from the land and float in the sea, to cause sea level rise.

Given a certain amount of ice on land finding its way into the sea, the calculation of sea level rise is complex, so I wonder about the precise 7.2 metre estimate. As sea level rises the area covered by sea increases, so a detailed study of shore lines and even potential inland seas is needed.

Of course Greenland is not the only place where the ice is melting.

Antartica has a land area of 14 million square kilometres, and the average ice thickness of 1.6 kilometres I roughly calculated. A sea level rise in the order of 60 metres would result from all this ice finding its way into the sea - without taking into account sea area increase.
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