![]() ![]() ![]() Mechanism one: stratospheric polar vortex Both mechanisms, less extensive Arctic sea ice and more extensive fall snowcover in high-latitude regions, are related to warmer conditions in the Arctic and colder conditions in some mid-latitude regions. Another possible contributor to extreme winter weather, especially across Eurasia, is increased autumn snowcover in high-latitude regions. Most theories connecting rapid Arctic warming to changes in mid-latitude weather in the Northern Hemisphere begin with melting sea ice and its influence on atmospheric circulation. disruptions of the jet stream) that can lead to extreme weather in mid-latitude regions such as the United States. These disruptions often lead to coupled extremes: simultaneous cold and warm extremes in different mid-latitude regions. This rapid warming, known as Arctic amplification, is associated with atmospheric circulation disruptions (e.g. ![]() The Arctic is warming nearly three times faster than the rest of the planet. The past seven years (2014-2020) were the hottest seven years on record for the planet.Ĭlimate signals breakdown Climate signals #1 and #2: Arctic amplification and large scale global circulation change Globally, the rise in average temperature is well-documented, and the pace of warming is accelerating. In Texas, all but one of the state’s all-time hottest days on record have occurred in recent decades. You can still roll record lows, but you roll record hot days much more often. Winter weather still happens in a warming worldĬold weather doesn't cancel out decades of warmer temperatures. In Houston, for example, the coldest yearly temperature has increased 8.6☏ since 1970. The coldest temperatures recorded each year in cities across the nation have trended upward over the past 50 years, including in cities hit by the Arctic outbreak in February 2021. Rapid warming in the Arctic means Arctic air outbreaks in the US aren't as cold as they would have been in the absence of climate change. The Arctic is warming nearly three times faster than the rest of the planet, in a process known as Arctic amplification.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |