null hypothesis, definition of

Climate change is a change in the statistical distribution of weather over periods of time that range from decades to millions of years. It can be a change in the average weather or a change in the distribution of weather events around an average (for example, greater or fewer extreme weather events). Climate change may be limited to a specific region, or may occur across the whole Earth.

In recent usage, especially in the context of environmental policy, climate change usually refers to changes in modern climate. It may be qualified as anthropogenic climate change, more generally known as global warming.

Wikipedia - Climate Change entry

• Global Warming Causes “Deadly Marine Cold Spells”
  "Bait and switch science" says global warming caused a "deadly marine cold spell." Real science says "move along, there's nothing to see here."
• Climate Change: What’s the Worst Case?
  Reposted from Dr. Judith Curry’s Climate Etc. Posted on August 22, 2019 by curryja | by Judith Curry My new manuscript is now available. A link to my new paper ‘Climate Change: What’s the Worst Case?’ is provided here [worst case paper final...
• Raising the bar on statistical significance
  I was searching the early edition of PNAS for the abstract of yet another sloppy “science by press release” that didn’t bother to give the the title of the paper or the DOI, and came across this paper, so it … Continue reading...
• Did Global Warming Prevent a Record-Breaking D.C. Snowstorm?
  Guest post by Paul C. “Chip” Knappenberger and Patrick J. Michaels We haven’t seen any media stories relating global warming to the Wednesday’s weather in D.C. We are certain that this would not have been the case had more than …...

Related Tags: science, mathematics