The Global Environment and Marine Department of the Japanese Meteorological Agency (JMA) recently corrected the long-term trend in the annual mean sea ice extent in the Antarctic area: from 0.015 x 106 km2per year to 0.019 x 106 km2 per year on 11 May 2018.
That’s more than a 25% adjustment (15,000 sq. km to 19,000 sq km). So while chunks the size of Manhattans may break off from time to time, about 300 Manhattans of new ice get added annually.
The report notes that in the Antarctic Ocean: “the annual maximum and annual mean sea ice extents have shown a long-term trend of increase since 1979”.
The Japanese weather and climate site provided the following two charts showing sea ice extent for both the Arctic and Antarctica, respectively, since 1979. From them, we see some interesting developments.
Arctic downward trend halted
Although the Arctic has seen a downward trend over the past 4 decades, we note that the mean Arctic sea ice cover has remained mostly steady over the past 11 years (since 2007). Moreover, the Arctic and Greenland ice volume have piled up recently.
Sea ice extents are calculated from brightness temperature data provided by NASA and NSIDC (the National Snow and Ice Data Center). Image: JMA here.
Next, we look at the Antarctic, which also reveals some interesting aspects.
Image: JMA here.
Long-term increase “virtually certain”
Though the Antarctic dipped markedly over the past 4 years, the overall trend has been upward. In its commentary, the JMA states “it is virtually certain that there has been a long-term trend of increase in the annual maximum and annual mean sea ice extents in the Antarctic Ocean since 1979.”
Little change since 1980
When looking at the annual linear mean trend of both the Arctic and Antarctica and combine them, then we have a total annual mean of about 24.2 million square kilometers back in 1980.
And when we look at 2017, we see a combined mean amount of about 22.7 million square kilometers, which is about 1.5 million sq km less than 1980 – or roughly 7% less. This is within the range of natural variability.
Both the warm phase of the Atlantic Multidecadal Oscillation (AMO) and the Pacific Multidecadal Oscillation coincided in the late-20th and early-21st century to push global temperatures upwards, and thus contribute significantly to the decrease, yet only managing to reduce global mean sea ice area by some 7%.
All the talk of rapidly melting ice caps is more hysteria than reality.
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This whole Global Warming/Climate Change in L.A. where they painted the streets white over this Global Warming/Climate Change poppycock proves that modern enviromentalisms a mental disorder caused b watching Al Bore and Leonardo DiCaprios junk science fake films while snorting funn flour up your nose and smoking wacky weed from your Hooka
soooo… taking Manhattan Island as a unit of measure, Antarctica is gaining ice at a rate of 30,000% … that’s really cool 😉
Wow the 5000 residence of Antarctica get 300 more Manhattan’s
of ice to add to their existing equivalent 235,000 Manhattans of 1 .5 mile thick ice .
The eco-anarchist, population elimination industry would if they could hope for more ice and eliminate more people through their population culling agenda .
Why not put the Mueller probe on it so they can earn the $30,000 per day they are fleecing tax payers .
First you have a conspiracy to spy on a political opponent by the government with the complicit support of the USA justice department . The you have the same gang trying to take down
the duly elected President and the real cherry on top is the same traitors are investigating themselves while a cross between Mr . Magoo and Alfred E. Neuman looks blankly out a window in repose .