Cold snaps during recent winters may be due in part to global warming causing what is known as negative phase Arctic Oscillation (AO). See http://earthobservatory.nasa.
I recommend one study data from scientifically reliable and reputable sources, such as NOAA/NCDC, rather than known unreliable, ideologically motivated, discredited sources such as Heartland Institute, Daily Mail, and the WSJ editorial page. http://www.ncdc.noaa.gov/oa/
If one doesn't believe the data, then impeach that data by highlighting their insufficiency, inadequacy or gaps, or rebut them with other data and submit your work to a scientific journal for peer review. That is how science works. While climate science is a system science, the various components and empirical data inputs that go into that system science are amenable to the scientific method. Human belief is not one of those components. Natural laws (of physics, chemistry, quantum mechanics, cosmology, evolution, etc.) and emergent scientific truths, of which anthropogenic global climate disruption is one, do not depend on human belief for their existence and veracity.
Cooling? No demonstrable warming trend? False. Unless one does not know how to read a graph.
http://www.skepticalscience.
The marked divergence between expected and observed beginning around 1970 corresponds to anthropogenic forcings, not natural variability (which is accounted for in models). http://ossfoundation.us/
How do we know it's anthropogenic? Science: http://www.skepticalscience.
For a risk management approach to confronting the policy challenges of global warming, see, e.g., Wesleyan U. economist Gary Yohe, here: http://www.sciencemag.org/
