reply to post by Animal
Okay, I have taken time to study the charts more carefully, and I must say that although I was slightly misled by the comparison images, I find that
the premise still holds true, especially if we take a step back and look at the whole picture. For example, the following link shows the Southern
Hemisphere ice levels:
Southern Hemisphere Sea Ice Levels
On this chart, if you look at the values from 1979 to 1993, you will not see any value rising higher than 16 million sq/km, however, from 1994 to 1997
the upper limit hits 16 million no less than SIX (6) times, and actually goes past the 16 million mark once in the winter of 2007! So, the maximum
ice in the southern hemisphere does seem to be growing during the winter.
Also, when comparing the summer low levels for the southern hemisphere, we see the level drop to 2 million sq/km every single year (15 times), with
the lowest level of the entire period occurring in 1993. For the period from 1993 to 2007, we see the low level drop to 2 million or greater only 10
times, instead of 15 times as it was for the early period.
So, for the southern hemisphere, we see that in both summer and winter, the southern hemisphere is displaying what appears to be a trend in increased
ice during winter, and less melting in the summer.
Now, for the northern hemisphere, we see a different situation:
Northern Hemisphere Sea Ice Levels
For the winter high levels, we see a reduction of about 1 million sq/km of arctic ice, which is a drop of about 6.6% from the highest level.
For the summer low levels, we see an increased melting of about 2.5 million sq/km. from 1979 to 2007 (16.6% reduction), but then for 2008 the melting
reduces by only 2 million (13% reduction), indicating that the trend may be slowing or reducing.
Though the overall trend does appear to be dropping at about 6.5%, there may indeed be an upturn beginning at this point in time. What gives rise to
this is the strong correlation between predictable variance in the solar constant S (indicating solar energy output), which seems to follow sunspot
activity, but not in a simple straightforward manner. One can't expect to see sunspots increase in linear sync with variations in S, as the
relationship between the two is indeed more complex, as detailed in the following article by Dr Theodor Landscheidt, a peer-reviewed climatologist.
Article by Theodor Landscheidt
So, even though there has indeed been an apparent reduction in northern hemisphere sea ice, the southern hemisphere is showing a slight increase
trend-wise, and the northern hemisphere levels may indeed be moving back up because of changing solar activity patterns.
I do apologize for misinterpreting the comparison diagrams at the University of Illinois website. I should have looked at it in greater depth, and
noticed that the white areas in the more recent images showed annual snowfall levels, whereas the earlier images did not have them included. I think
somehow my mind quickly integrated the white areas without looking into it more carefully.