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Wednesday, July 17, 2013

Denier weirdness about melting ice sheets

Sou | 2:37 AM One comment so far. Add a comment

Which would you vote for as the most uninformed comment about this study by Wouters et al: Limits in detecting acceleration of ice sheet mass loss due to climate variability.  In the abstract the researchers indicate they are looking to separate short term variability from the longer term melting from global warming:
We find that the record length of spaceborne gravity observations is too short at present to meaningfully separate long-term accelerations from short-term ice sheet variability.:

Choices are:

1. The headline chosen by Anthony Watts: New study: Arctic ice melt may be natural event, no consensus on cause.  (Someone tell Anthony - they know that human-induced global warming is causing the ice to melt.  What they are wanting to do is determine just how fast it's melting from global warming.)

Or

2. Dave who says:
July 16, 2013 at 8:30 am Shouldn’t melting sea ice lower sea level?

Or

3. RT who is probably confusing Antarctic sea ice with continental ice, writing:
July 16, 2013 at 8:45 am  Aren’t the NASA ICESAT satellites newer and show a net gain of ice on Antarctica? The study looking at both GRACE and ICESAT sure interpreted a net gain. I’d hope these researchers are familiar with that study.

Or

4. Ken Hall who says:
July 16, 2013 at 8:27 am  If all this glacial ice melt from Greenland and the Antarctic continent at the south is acceleralting so much, how come sea level rise has slowed down so much? Where is all the water going? Massive inland lakes are not increasing. In fact in areas of rapidly increasing local populations, such fresh water sources in some regions are becoming much smaller. So if the 99% of the ice cover which could increase sea levels, really is melting at an increased rate, surely the rate of sea level rise should be accellerating, but it is not. Why not?

Here is a chart showing the rise in sea level, which is currently around 3.2 mm a year.  It's speeding up not slowing down.

Data Source: U Colorado

 
Update: Anthony has a new article about another study on ice sheet melt. He talks of "quantifying numbers" and doesn't know the difference between determining the rate of melt and the total melt for a given temperature increase.

1 comment:

bill said...

Shouldn’t melting sea ice lower sea level?

That's a black mark for Dave's primary school, then.