the Air Vent

Because the world needs another opinion

Northern Hemisphere f11, f13

Posted by Jeff Id on April 2, 2012

I have quietly been spending some more hours of free time on sea ice and have a ton of data to present.  Previously, we found that there was a nearly statistically significant difference in trend between satellite NOAA 17 and 13 that would create a spurious trend increase.  In addition, we found a fairly strong offset in the data which would tend to go in the opposite direction.  Post here.

Now I’ve got a quick comparison of NOAA11 and 13 sea ice instruments which have an overlap only 6 months long.  In this dataset, the trend is in the opposite direction.  Below is a plot of the various satellites in the Arctic.

The plot below shows the overlap region of f13-f11 satellites.

The next graph shows a large nearly statistically significant POSITIVE trend between the NOAA13 sat and the previous #11.

Recall that there was a nearly statistically significant negative trend in the NOAA 13-17 transition.

The only things to conclude from this is that the overlap regions of satellite data don’t have a trend bias in the same direction and there is not enough match between the satellite changes to reliably be within a two-sigma trend. Still, that is more solid than what I have seen around the Internet.

4 Responses to “Northern Hemisphere f11, f13”

  1. Brian H said

    your rant, replete with stupidity, is evidently on the wrong thread, too.
    Satellites with built-in trends! What will they think of next? Ain’t technology wonderful?

  2. steveta_uk said

    Doug, your stupidity and arrogance is almost beyond belief, so I’m sure many have started to wonder if you are really a warmist trying to destroy the value of the sceptical blogosphere.

    But on the off chance that you are just thick, and your question about “sensible heat transfer, so where are the photons for that energy?” is meant seriously, I’d suggest you think about the following.

    Firstly, I’d suggest you think about why you are resorting to such ancient concepts as “sensible heat”, which may have been useful as a description some centuries ago but doesn’t really belong in the era of QCD.

    Then, think about what the mechanism is for a molecule on the surface molecule to transfer energy to an atmospheric molecule, and thus reduce it’s temperature and increase the atmospheric temperature.

    The atoms of the warmer molecule don’t physically vibrate against the atoms in the air and thereby transfer the heat. No, what happens is that the fields of the atoms interact, and this is done via an exchange of photons.

    So that’s where the photons for the energy are. It’s the only way to transfer heat. It’s the only way that any two atoms have to interact in normal states of matter.

    I’m a bit surprised that you don’t know this – I first learned about these things at school in physics lessons, so it doesn’t even require a university education.

  3. Frank said

    Changeovers between satellites (microwave sensors) are happening in the Antarctic and Arctic at the same time, but in opposite seasons). If different calibrations are needed in each hemisphere, the calibrations might be seasonally appropriate, but biased annually. Something of this nature could account for the fact that Antarctic sea ice is growing while Arctic sea ice is not. It isn’t clear to me why anyone thinks an overlap period less than a year is appropriate since the difficulty of telling ice from water changes with the season.

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