Global sea ice at record low

 

They keep putting out stories like this.

New Scientist: Global sea ice is at lowest level ever recorded

It’s a new low point. The area of the world’s oceans covered by floating sea ice is the smallest recorded since satellite monitoring began in the 1970s. That means it is also probably the lowest it has been for thousands of years.

The latest observations from the US National Snow & Ice Data Center in Boulder, Colorado, show how the ice extent has fallen to a new low this year (bright red trace in the graph below).

picture1

In the Arctic, the low in sea ice coverage is a result of both global warming and unusual weather events probably influenced by global warming.

But in the Antarctic, the current low in seasonal sea ice could just be a result of natural variability.

The extent of Arctic sea ice should be growing rapidly during the northern hemisphere winter. But not only has the Arctic been warming rapidly, this winter repeated incursions of warm air have pushed temperatures even further above average.

Yep, there’s been cold weather in the US and European winters, and we have had an unusually cool summer here, but these are regional and short term variations. In contrast to here Australia has been hot.

And at the bottom of the world there is news of another large ice shelf crack developing: British Antarctic Survey abandons polar base as worrying crack grows in ice

Scientists at the British Antarctic Survey are abandoning their research station for the first time ever this winter after a new worrying crack developed in the ice sheet.

The renowned Halley VI ice base, from which the hole in the ozone layer was first detected, was already scheduled to be relocated 14 miles across the Brunt Ice Shelf because of an encroaching fissure in the ice.

But a new crack has been steadily growing to the north of the base, and computer modelling suggests that it could cause a large iceberg to calve away from the sheet, which could destabalise the area.

It is the latest problem to beset the base.   In 2012, satellite monitoring of the ice shelf revealed the first signs of movement in the chasm that had lain dormant for at least 35 years and, by 2013, it began opening at an alarming pace of one mile per year.  If the base does not move, it could be in danger of tumbling into the chasm by 2020.

To make matters more time critical, in October, a new crack emerged 10 miles to the north of the research station across the route sometimes used to resupply the base.

The base is crucial to studies into global issues such as the impact of extreme space weather events, climate change, and atmospheric phenomena.

That’s a bit ironic, whether the accelerating cracking is coincidental or not.

 

 

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4 Comments

  1. PDB

     /  17th January 2017

    “It’s a new low point. The area of the world’s oceans covered by floating sea ice is the smallest recorded since satellite monitoring began in the 1970s. That means it is also probably the lowest it has been for thousands of years”.

    Drawing a VERY long bow if they have been only recording it since ‘the 1970’s’ but can say (with a straight face) “That means it is also probably the lowest it has been for thousands of years”.

    Considering the age of the planet, 40 odd years of data collection is hardly representative of anything either way.

    Reply
  2. PDB

     /  17th January 2017

    Reminds me on this rubbish statement today from Aussie climate scientist Steve Sherwood…….

    “”There is no chance that rainfall in Australia will remain the same as the climate warms,” he said.

    “With two degrees of global warming, Australia is stuck with either more aridity, much heavier extreme rains, or some combination of the two.”

    Ummmm, so basically he is saying man-made climate change will cause more rain or less rain or a ‘combination of the two’ (which could be similar to that experienced now). Sounds like he is having a bet every which way – and people buy this stuff? Not to mention his ‘two degrees of warming’ is based on what exactly?

    Climate science is in the main rubbish science.

    Reply

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