The Arctic Sets Yet Another Record Low Maximum Extent (nsidc.org)

Layzej writes: Arctic sea ice was at a record low maximum extent for the second straight year, according to scientists at the National Snow and Ice Data Center (NSIDC) and NASA. This year's maximum extent is 1.12 million square kilometers below the 1981 to 2010 average of 15.64 million square kilometers. Ice extent increases through autumn and winter, and the maximum typically occurs in mid-March. Sea ice then retreats through spring and summer and shrinks to its smallest or minimum extent typically by mid-September. Ice melt in the region is reducing the transport of warm southern waters brought north by the Atlantic Meridional Overturning Circulation (AMOC). "Some studies suggest that decreased heat flux of warm Atlantic waters could lead to a recovery of all Arctic sea ice in the near future," said NSIDC senior research scientist Julienne Stroeve. "I think it will have more of a winter impact and could lead to a temporary recovery of winter ice extent in the Barents and Kara seas."

Comments

Re:No amount of evidence is enough

[religionofpeas]

The problem isn't the science behind warming it's the ridiculous solutions that are being proposed.

The problem is that half the people are denying the science, so we can't even start a proper discussion about any proposal.

Re:No amount of evidence is enough

[Smidge204]

Well, there are roughly 7 billion people on the planet, and even if only a relatively small proportion of them are screwed (realistically, MOST people will be screwed...) it's a safe bet that problems will persist for *many* generations.

Sea level rise alone stands to displace over a billion people, and that doesn't account for all of the other problems like violent weather and impacts to food and fresh water supplies.

I don't think "billions" is at all histrionic, or even much of an exaggeration.
=Smidge=

Re:No amount of evidence is enough

[hey!]

World bank projections in agricultural productivity in 2050 show reductions in productivity across the Middle East, Africa, South America, Southeast Asia, Australia and large swaths of North America. This takes into account longer growing seasons and places where rainfall increases. Russia, for example, does extremely well under the warming scenario with longer growing seasons and increased rainfall in currently arid areas.

The US and Australia being rich countries with relatively low birth rates will be able to import food from places like Russia. But Africa, which current sports a population of 1.1 billion, will have a population of two billion and less food production to feed them. Large areas of India are expected to receive much less rainfall and to be less productive. India currently has a population of 1.2 billion, expected to grow to 1.5 billion.

Now everyone in these places won't be suffering. India currently boasts a middle class larger than the US middle class. They'll continue to be able to buy food. But they have an enormous underclass who are already living in conditions that are very precarious.

This is not an alarmist picture. Simple math gets us to the 10^9 benchmark in South Asia alone. That's should be alarming. But it's not hopeless. Even if we can't reduce the rate of the climate change we expect to take place, there are other things we can do, like develop drought-resistant crops, better agricultural technology, etc. The "billions suffering" isn't much of a stretch provided we assume we do nothing to avoid that happening.