Secondly, year to year fluctuations are very large and simply reflect the chaotic nature of weather — the change over a single year does not say anything
meaningful about climate trends.
One of the odd coincidences that colors our
judgment about climate trends is that man began systematically measuring temperatures in the early to mid-nineteenth century just as the world was beginning to exit what was perhaps the coldest period of the last millennia.
Of course, I don't think that one example of unusual weather tells us anything
about climate trends, I merely throw this in as a counter to those who think that modest warming would be catastrophic.
It will hopefully remind people what we've always known — what the textbooks have always said — that ones must use more than a decade or even 15 years of data to say anything
about climate trends.