Changes in climate can cause the polar jet stream — the boundary between the cold North Pole air and the warm equatorial air — to migrate south, bringing with it cold, Arctic air. This is why some states can have a sudden cold snap or colder-than-normal winter, even during the long-term trend of global warming, Werne explained.
Levitt has it right, after all Canada is a Polar country with a lot of bi-polar people,.. especially those worried about “impending doom” due to climate change. Global warming started 15,000 years ago when Canada then,… looked like Greenland today. The ice above Calgary, Winnipeg, Ottawa and Montreal was a mile thick. We would all be simply a “greasy smear” on the bedrock surface if those conditions existed today.
Despite overwhelming scientific consensus about the causes and reality of global warming, the issue is contentious politically. For instance, deniers of climate change have argued that warming slowed between 1998 and 2012, a phenomenon known as the "climate change hiatus."
, too, is an obvious effect of global warming. Only 25 glaciers bigger than 25 acres are now found in Montana's Glacier National Park, where about 150 glaciers were once found, according to the U.S. Geological Survey. A similar trend is seen in glacial areas worldwide. According to a 2016 study in the journal Nature Geoscience, that this rapid retreat is due to human-caused climate change. Some glaciers retreated up to 15 times as much as they would have without global warming, those researchers found.
Franke – a wonderful and poignant story for one who grew up happily in the snows of Alberta’s mountains and now, living in the Bay Area of California, misses a real winter. An evocative rumination on something that is part of the essence of being a Canadian, which can be seen from a new angle once one has moved away. Many of us love the beauty of snow and the games of winter weather, but who doesn’t tire quickly of the drive to work in ice and sleet side of the season? It seems we love snow, but want to love it on our own terms. And this year, the old Mother Nature has pulled a fast one – as mentioned above, California has had its lemons, oranges and avocados frozen to a fare-thee-well this year. The so-called global warming is creating a lot of hardship amongst small and large fruit farmers. The weather it is a changing, but it is not clear which way the wind will blow. Remember to send us some pineapples from the soon-to-appear orchards of the Don River Valley, if this year’s change becomes a pattern.
Extreme weather is another effect of global warming. While experiencing some of the hottest summers on record, much of the United States has also been experiencing colder-than-normal winters.
Global warming doesn't just mean warming — which is why "climate change" has become the trendier term among researchers and policy makers. While the globe is becoming hotter on average, this temperature increase can have paradoxical effects, such as more serious snowstorms. There are several big ways climate change can and will affect the globe: By melting ice, by drying out already-arid areas, by causing weather extremes and by disrupting the delicate balance of the oceans.
Perhaps the most visible effect of climate change so far is the melting of glaciers and sea ice. The ice sheets have been retreating since the end of the last Ice Age about 11,700 years ago, but the last century's warming has hastened their demise. A 2016 study found that there is a 99 percent chance that global warming has caused the recent retreat of glaciers; in fact, the research showed, these rivers of ice if the climate had stayed stable. Glacier National Park in Montana had 150 glaciers in the late 1800s. . The loss of glaciers can cause the loss of human life when icy dams holding back glacier lakes , or when .
Since record keeping began in 1895, the hottest year on record worldwide was 2016, . That year Earth's surface temperature was 1.78 degrees F (0.99 degrees C) warmer than the average across the entire 20th century. Before 2016, 2015 was the warmest year on record, globally. And before 2015? Yep, 2014. In fact, 16 of the 17 warmest years on record have happened since 2001, according to NASA.
Global warming may also lead to extreme weather other than cold or heat extremes. For example, hurricane formations will change. Though this is still a subject of active scientific research, current computer models of the atmosphere indicate that are more likely to become less frequent on a global basis, though the hurricanes that do form .
"And even if they become less frequent globally, hurricanes could still become more frequent in some particular areas," said atmospheric scientist Adam Sobel, author of "" (HarperWave, 2014). "Additionally, scientists are confident that hurricanes will become more intense due to climate change." This is because hurricanes get their energy from the temperature difference between the warm tropical ocean and the cold upper atmosphere. Global warming increases that temperature difference.
Lightening is another weather feature that is being affected by global warming. According to a , a 50 percent increase in the number of lightning strikes within the United States is expected by 2100 if global temperatures continue to rise. The researchers of the study found a 12 percent increase in lightning activity for every 1.8 degree F (1 degree C) of warming in the atmosphere.
Maybe you know that already — there are alarming stories in the news every day, like those, last month, that seemed to suggest satellite data the globe warming since 1998 more than twice as fast as scientists had thought (in fact, the underlying story was considerably less alarming than the headlines). Or the news from Antarctica this past May, when a in an ice shelf grew 11 miles in six days, then kept going; the break now has just three miles to go — by the time you read this, , where it will drop into the sea one of the biggest icebergs ever, a process known poetically as “calving.”