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Hank Roberts
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Scott, was that you earlier? http://neven1.typepad.com/blog/2012/12/the-real-ar5-bombshell.html?cid=6a0133f03a1e37970b017c34e4535e970b#comment-6a0133f03a1e37970b017c34e4535e970b did you change your mind?
Toggle Commented Jan 2, 2013 on Looking for winter weirdness 4 at Arctic Sea Ice
One more -- the MetEd site https://www.meted.ucar.edu/ offers coursework in meteorology online. You have to sign up to get access. It's serious technical study, much of it well beyond me as an amateur reader, but I learn a lot about what I don't know, at least. This is often handy--it's taught me to look stuff up rather than speculate, as my guesses are usually way wrong. Their image for the satellite coverage polar gap (Antarctic) for example is http://t3.gstatic.com/images?q=tbn:ANd9GcSsYK6ysSPlSEjiuJJpYKn8ogKhnh6-Xe4EmymbJ5XncWRGb4qR3oN5lbIY (When searching, you'll also find hits that are mentions of a satellite coverage gap of a different sort -- the problem of old satellites failing and no new satellites funded, built, and available to fill in -- several countries are now flying aircraft over the polar regions to try to cover areas so there's at least some information available, until new satellites are in place and calibrated (Japan has one that's in place but still being calibrated, for example)
Toggle Commented Jan 2, 2013 on Looking for winter weirdness 4 at Arctic Sea Ice
You can do a site search to figure out what's being shown in the pictures. Here: http://www.google.com/search?q=site%3Apolar.ncep.noaa.gov+polar+hole+data Various methods are used to fill in the gap areas that are always missing data around the poles.
Toggle Commented Jan 2, 2013 on Looking for winter weirdness 4 at Arctic Sea Ice
For 'Apocalypse' -- I'm just a reader, not a scientist, but it seems your method for creating images isn't showing the gap in data. (There's a very old joke about how it's easy to reinvent the wheel, but hard to get the hole exactly right in the center -- from the days wagon wheels were hand-crafted out of wood and iron. It's still true ...) It might be more useful to use your page to provide links to sea ice imagery already available from the satellite data providers, rather than generating your own pictures. Those sites that offer both data and images explain how the imagery is generated, note when and how it's validated, and they go back and update the older draft images when the data behind them is corrected. That requires a whole lot of work to keep valid imagery updated. But if you don't revise the imagery as the data is corrected, people can't use your pictures to make comparisons. Each data set (each satellite) has an area that's not covered around the poles. I knew about the polar orbit tracks and why they always miss the poles (planet's turning under the satellite path, satellite is staying at the same position relative to the Earth and Sun) -- so I could easily enough find discussions; people who don't know how polar satellite coverage works will need an explanation to understand why there's a gap in the middle (and a different sized gap for each satellite). Here for example, two different satellites: "... Sea ice in the 1984 image has a blockier appearance because that sensor had coarser resolution. The white circle over the pole in each image is a data gap resulting from satellites flying close to—but not directly over—the poles. The wider orbital coverage by AMSR-2 (and other satellite instruments) has shrunk the size of this gap. The area around the North Pole is ice-covered—an assumption confirmed by many airborne and ice-surface expeditions—but researchers use an average of the concentration just outside the gap to estimate the extent within...." http://earthobservatory.nasa.gov/IOTD/view.php?id=79256
Toggle Commented Jan 2, 2013 on Looking for winter weirdness 4 at Arctic Sea Ice
I found the current thread with comments from the Apocalypse author, at http://neven1.typepad.com/blog/2012/12/looking-for-winter-weirdness-4.html
Toggle Commented Jan 2, 2013 on New site with new thickness maps at Arctic Sea Ice
Someone just asked about the Apocalypse imagery over at Realclimate in the new Unforced Variations thread. I found no contact info at the Apoc google blog page and Google led me here. If its author still reads here -- please fix the problem handling missing data. http://www.realclimate.org/index.php/archives/2013/01/unforced-variations-jan-2013/
Toggle Commented Jan 2, 2013 on New site with new thickness maps at Arctic Sea Ice
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Jan 2, 2013