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Look, it's melting...

Notes tagged with "Thickness"

Updates Melting Season 2015

I finally found the time to update the sea ice page. All images are now in sync with 2015. The most exciting additions are two daily sea ice thickness maps. The CryoSat 2 product is provided by the NERC Center for Polar Observation and Modelling (CPOM) in the U.K.. The map combines all data points from the most recent 28 days and thus produces a full picture of the Arctic. The second map is still an experimental science product using data from the AMSR2 satellite coming from arctic data archive system (ADS). The ADS is supported by GRENE Arctic ...

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My Problem with Sea Ice Extent

Since 1979 there is a sea ice extent record for the Arctic with mostly daily measurements. The trend is clear and down, so what is the problem?

Imagine a single idealized ice floe: 1 kilometer long and 1 kilometer wide with a thickness of 2 meter drifting in the Arctic Ocean - a pretty flat cuboid. Roughly 20 centimeter are visible above sea surface as freeboard. NASA’s Arctic Mosaic at highest resolution would represent the floe with 16 white pixels arranged as square.

Let’s further assume bottom- and top melting are equal and and there is enough energy available to melt 1 meter of ice from each of the six sides within a month (30 days). How much ice is left after this period? Exactly, zero.

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New CryoSat Data: 3,000km³ loss between latest Winters

Good timing: Between a storm that took one million km² within one week from extent and the next record low the UCL finally releases long awaited concrete numbers from the CryoSat 2 Mission. The take away message is the trend strongly indicates an ice free Arctic around 2020. That fits nicely to the PIOMAS trend in this chart. The broader picture is within one generation (30y) we will have removed more than 6 million km² from Earth's reflecting September ice shield.

Here's an interesting BBC Radio interview with Seymour Laxon of the Centre for Polar Observation and Modelling: http://news.bbc.co.uk/today/hi/today/newsid_9744000/9744378.stm

And here an excerpt from the Guardian:

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