"Weather patterns" are the recurring changes in weather conditions over a certain area, like how much it rains, the temperature, and wind direction. Full definition
It's an unusual step, and one that could have major implications on how we view changing weather patterns in a world that scientists agree is heating up. (treehugger.com)
The science on the potential health effects from rising temperatures and changing weather patterns in a greenhouse - warmed world remains laden with questions. (dotearth.blogs.nytimes.com)
It is inaccurate based on the changes of weather patterns over several years after an eruption. (illconsidered.blogspot.ru)