There’s snow in Baghdad, and global temperatures have seen their biggest one-year change—in this case, downward—in recorded history. So is global warming kaput?

Cooler weather has the blogosphere alight with speculation about the climate’s real changes. Short-term temperature moves fire up both camps. From Planet Gore:

Hopefully this will cool the hysteria in the U.S. Congress and parliaments around the world so that we can understand the science of our climate before we pursue policies that could wreck our economy and quality of life.

Environmental Defense says one month does not a trend make:

Global warming is a process that occurs over decades. It can’t be proven or disproven by a single month’s temperature.

There are theories for all tastes. Daily Tech started it all, arguing that last year’s nippy weather “wipes out a century of warming.” Energy Outlook pored through the data and points at the sea. Maybe it’s the sun? Environmental Economics did the heavy lifting, parsed all the sunspot data from Goddard, and concluded that’s not to blame:

The current downturn in temperatures may be caused by a valley in the sunspot cycle. But that doesn’t mean that global cooling is taking place. It just means that temperatures are likely to be more variable until sunspot activity increases again.

Whether it’s sunspots, La Nina, or something else altogether, the timing couldn’t be better for the Heartland Institute, set to host a global warming skeptics powow Monday on Broadway. Friends in high places?  Source

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