Evidence that global warming is Occurring
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| The Arctic polar vortex pushes into the Northeast in this NASA satellite image.
Credit: NOAA/NASA GOES Project |
Record-breaking cold winter temperatures today (Jan. 6) means global warming must be a farce, right?
Wrong. Here's why:
What's most important to remember is that weather isn't climate. A single storm isn't evidence for or against global warming. "It is important to understand that weather is like one play in a football game. Climate is the history of the NFL, " Mike Nelson, chief meteorologist for KMGH in Denver, wrote in a Facebook post.
Despite the frigid cold gripping the country right now, over the past few decades, winter temperatures have gotten warmer, on average, according to records from the National Weather Service, which has tracked U.S. weather since the mid-1800s. For example, lakes in the Midwest freeze later and have thinner ice now than they used to, making ice fishing more dangerous. Spring arrives 10 to 14 days earlier across the United States than 20 years ago. Trees and plants bloom sooner and insects and birds emerge earlier.
"On a given day, week or season, cold or wintry weather signifies nothing about the background climate changing, " Marshall Shepherd, president of the American Meteorological Society, said in a blog post.
There's also evidence that global warming is changing weather patterns in the Arctic and elsewhere, which could be responsible for some of the intense winter storms that have hit the United States in recent years. [The Reality of Climate Change: 10 Myths Busted]
Rising polar temperatures are shrinking the Arctic ice cap, making it smaller and thinner. Less ice means more of the sun's summer heat is stored in the ocean instead of being reflected back into the atmosphere. One way the shrinking ice changes weather is by pushing winter air south. When the stored ocean heat gradually escapes in autumn, it changes the pattern of an atmospheric wind called the polar vortex, streaming frigid Arctic air into North America and Europe, scientists think.
This week's wintry freeze was caused by the polar vortex veering as far south as Atlanta, according to forecasters.
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What is the evidence that global warming is a real process caused by humans and occurring right now
Fossil fuel use, agriculture, and land-use change fundamentally affect our planet. We use too much greenhouse gas, they say!
WHAT IS THE EVIDENCE THAT GLOBAL WARMING IS EITHER NOT OCCURRING OR IS NOT CAUSED BY HUMANS
One fact I love to trot out when alarmists start screaming "global warming" is that a major factor in the rivalry between England and France was that, before the "little ice age", British wines were actually out-performing French wines, until climates shifted, and England became the cold, rainy country we all know and love.
@Our Cooling Planet: Fact: Over 31, 000 scientists recognize that there is no convincing scientific evidence of man-made global warming. #climate