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Author: Subject: Did you know this? The antarctic ice mass is growing, not shrinking
scholar
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eek.gif Post 499724 posted on 25-11-2015 at 01:35 Reply With Quote
Did you know this? The antarctic ice mass is growing, not shrinking



Article here.

Quote:
Antarctica is growing not shrinking, according to the latest study from NASA. Furthermore, instead of contributing to rising sea levels, the still-very-much-frozen southern continent is actually reducing them by 0.23 mm per year.

The study – by an organization not hitherto noted for playing down environmental scares – will come as a major blow climate alarmists. For decades, they have cited Antarctica as one of the bellwethers of global warming catastrophe and have claimed – as the IPCC’s most recent Assessment Report did – that its land ice mass was slowly melting into the sea.

But the satellite measurements used in the latest NASA report tell a different story.


It is good to read about a study based on actual scientific data (from satellite measurements), instead of doctored data and/or unscientific estimates.

The study says that the antarctic mass has been adding 82 billion tons of ice per year--no small amount.

But. . . this brief popular article does not go into the details of the calculations. Obviously, the satellite measurements are not directly the basis for the conclusion that Antarctica's growth in ice is dropping the sea levels by .23 mm (compared to what they would be without it). I'm thinking that calculation is derived by subtracting the water-volume that one would get from melting the ice and then using solid geometry to distribute that volume to the ocean surfaces of our world, and then calculating the tiny difference in depth.


However, the main basis for ocean levels rising by those who believe in man-made global warming is the increase in water volume when liquid water expands at greater temperatures. Oceanographic studies found, instead, that ocean waters were dropping in temperature, in contradiction to the global warming theory.
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[*] Post 499725 posted on 25-11-2015 at 07:03 Reply With Quote


scholar I did know that and didn't need to read about it on such a biased site that wouldn't even let me read until I "voted".



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[*] Post 499731 posted on 25-11-2015 at 09:23 Reply With Quote


This puts it in perspective: From NASSA

https://www.nasa.gov/content/goddard/antarctic-sea-ice-reaches-new-record-maximum

Quote:
Sea ice surrounding Antarctica reached a new record high extent this year, covering more of the southern oceans than it has since scientists began a long-term satellite record to map sea ice extent in the late 1970s. The upward trend in the Antarctic, however, is only about a third of the magnitude of the rapid loss of sea ice in the Arctic Ocean.

The new Antarctic sea ice record reflects the diversity and complexity of Earth’s environments, said NASA researchers. Claire Parkinson, a senior scientist at NASA’s Goddard Space Flight Center, has referred to changes in sea ice coverage as a microcosm of global climate change. Just as the temperatures in some regions of the planet are colder than average, even in our warming world, Antarctic sea ice has been increasing and bucking the overall trend of ice loss.

“The planet as a whole is doing what was expected in terms of warming. Sea ice as a whole is decreasing as expected, but just like with global warming, not every location with sea ice will have a downward trend in ice extent,” Parkinson said.

Since the late 1970s, the Arctic has lost an average of 20,800 square miles (53,900 square kilometers) of ice a year; the Antarctic has gained an average of 7,300 square miles (18,900 sq km). On Sept. 19 this year, for the first time ever since 1979, Antarctic sea ice extent exceeded 7.72 million square miles (20 million square kilometers), according to the National Snow and Ice Data Center. The ice extent stayed above this benchmark extent for several days. The average maximum extent between 1981 and 2010 was 7.23 million square miles (18.72 million square kilometers).


The single-day maximum extent this year was reached on Sept. 20, according to NSIDC data, when the sea ice covered 7.78 million square miles (20.14 million square kilometers). This year's five-day average maximum was reached on Sept. 22, when sea ice covered 7.76 million square miles (20.11 million square kilometers), according to NSIDC.
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