Discussion:
Jun 2018: Arctic ice 17218 km3 #6; av thickness 1.61m #7: UW PIOMAS
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M***@kymhorsell.com
2018-07-06 00:46:29 UTC
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The UW has released its assessment for Arctic ice volume for Jun 2018.

The number is 17218 km3, the 6th lowest June volume in the sat record.

Using NOAA's ice extent/area for the past 40 years we can also
approximate the average sea ice thickness. A tipping point is
reached when the average thickness can be melted in a single summer --
it means the end of "permanent" (aka "multi year") sea ice.

From the data about 1.5m of sea ice can be melted in the usual 21st cent
summer.

For PIOMAS ice volume the top10 lowest Arctic seaice volumes are now:

Year vol
(000s of km3)
2017 15.4
2012 16.002
2016 16.493
2011 16.5
2010 17.142
2018 17.218 <-- new #6 lowest vol
2013 17.538
2014 17.68
2015 18.557
2007 19.19


For calculated sea ice av thickness the record lows for June are now:

Year av thickness
(m)
2017 1.4366 <-- "past" tipping point
2012 1.4997 <-- "past" tipping point
2011 1.5349
2013 1.5438
2016 1.5935
2014 1.6029
2018 1.6077 <-- 7th lowest sea ice thickness
2010 1.6187
2015 1.7056
2007 1.7103

(NOTE: thickness has a counterintuitive aspect. As summer progresses
the av thickness can get larger as the thinner ice disappears).

--
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Aljazeera.com, 04 Jul 2018 10:16Z
[Worst floods in 40 years with 214 mm falling within a 24 hr period.
With an election coming up opp'n politician Imran Khan says the street
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system is threatening over next few days].

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Dangerous heat wave will continue across much of the central and northeast
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2C are clear," writes Prof Pete Smith in a guest post for Carbon
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of efforts to reduce greenhouse gas (GHG) levels in the atmosphere,"
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k***@gmail.com
2018-07-06 18:53:30 UTC
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.""However, over the fifteen years to 2016 the HadCRUT4v5 and Cowtan & Way GMST trends, of 0.138°C /century and 0.160°C /century respectively, are equally close to the 0.149°C /century ERAinterim trend; the GISTEMP and NOAAv4.0.1 trends are both above 0.17°C /century..."""
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