Here’s 60 years of global warming in 15 seconds courtesy of NASA.
Scientists emphasize that weather patterns always will cause fluctuations in average temperatures from year to year, but the continued increases in greenhouse gas levels in Earth’s atmosphere are driving a long-term rise in global temperatures. Each successive year will not necessarily be warmer than the year before, but with the current level of greenhouse gas emissions, scientists expect each successive decade to be warmer than the previous.
In other words, a dip in the polar vortex or an arctic blast, like the one we’re experiencing right now, does not disprove climate change or global warming.