BoM_Met

There is a slew of evidence this isn't just natural variability. If it is natural variability it still needs a trigger.

In the past, differing solar output has been one natural trigger. Solar output in the last 30 years has actually gone down, while global temperatures continue to rise, so we know this cannot be the case this time. Also, if increased solar output were to blame, we'd expect all layers of the atmosphere to be warming. In reality, only the troposphere is warming (where greenhouse gases are mostly found), while the temperature in the stratosphere is actually decreasing.

Additionally, the rate of change of temperature in the last 100, and particualrly the last 50 years is unprecedented throughout human history, and is consistent with the observed rise of greenhouse gases, in particular CO2, in the atmosphere.

Tornadoes can actually spin either way in either hemisphere, as they are on far too small a scale to be affected by the coriolis force.

Sure. Done. http://imgur.com/Qzj5xo2. Is that ok?

I'd like to get a campaign started, but I'd have to brainstorm some ideas for that. If we can get something as big as the ice bucket challenge spreading through social media, the impact could indeed be profound. Does anyone have any idea?

The best way to educate those who are skeptical is by knowing the facts, knowing the arguments against those they are likely to throw at you, and explaining these arguments to them clearly and calmly. It's also important to let them know the potential impacts for our generation and future generations to come. Even if we switch to a 0 Carbon system now, some of these impacts are already inevitable. That scares me.

We're in a negative phase of the Pacific Decadel Oscillation (PDO) at the moment. Negative phases have been attributed to a slowing of warming in the past century. Check out this graph, it's pretty compelling http://www.nature.com/polopoly_fs/7.14906.1389714879!/image/Warming.jpg_gen/derivatives/lightbox/Warming.jpg