In the week from late December to early January, high temperatures in the โปรโมชั่น slotxo
atmosphere above the Arctic increase by 100 degrees Fahrenheit. Although this may sound alarming But it is a natural phenomenon that occurs every few years. But experts say human-induced climate change could make these events more likely.This remarkable event is called Sudden Stratospheric Warming (SSW) and involves temperatures 50,000 to 100,000 feet above the ground. It disrupts typical winter weather patterns in the Arctic stratosphere, known as the polar vortex, and generally leads to more extreme winter weather in some parts of the Arctic. U.S.The polar vortex is a large, low pressure circus of cold wind that swirls counterclockwise, rapidly rotating the Arctic Circle from west to east, but when the SSW occurs, if this is a severe enough event, the winds often reverse and become It is east, and the polar vortex splits into two or three separate currents that travel southward to the middle latitudes, where there is cool air.
In most cases, SSW spreads through clouds to the Earth's surface over a few weeks. When this happened, it would dislodge the upper Arctic wind patterns, and the domino effect led to complex jet stream patterns around the world in middle latitudes such as Canada, the United States, Europe and Asia. That means that it almost certainly results in extreme winter weather, and in line with the patterns expected in the United States, most of which occur along the east coast.The current SSW has been characterized as a "major" event since late December, temperatures have increased from approximately minus -110 degrees Fahrenheit to minus -10 degrees - a 100-degree rise - at 100,000 feet above the North Pole.In the image below, the purple line shows sudden heat in the past week compared to the very flattering black line, which is the average temperature.
Cause of sudden global warming
Dr. Judah Cohen is an expert on sudden stratosphere warming events and the link between Arctic and mid-latitude climate pattern changes at atmospheric research and Environment (AER) Company Verisk He said the start of sudden global warming in the stratosphere was getting closer to the ground in the atmosphere known as the troposphere. But in order for this sudden interruption to rise from the troposphere into the stratosphere, you need to expend the excess energy from the extreme weather patterns that are not lacking in the period. Came through in the Arctic When all the numbers are broken, 2020 will be one of the warmest, if not the warmest, in the Arctic. This is especially true in northern Asia, near the Sea of Barents, Kara, Laptev and Siberia, where parts of the region averaged 10 degrees Fahrenheit above normal.
Even the Arctic is warming three times the rest of the Earth's speed due to climate change - a phenomenon known as Arctic expansion - this is a huge departure from normal. The result was a record-breaking low sea ice level near the Siberian coast.According to Cohen's theory, the lack of sea ice and the fact that it takes a few weeks longer than usual to recover this fall into the movement of events that shape the winter jet stream. The whole of Asia has been improved. Such improvements will contribute to sudden global warming.The animation below is an ideal illustration of the effect, featuring an improved thermal dome. (Called a ridge) over Northwest Russia and its immersion in a jet stream. (The so-called trough) in East Asia and the North Pacific.The jet stream is a fast-flowing river in the upper atmosphere that guides storms from place to place. Like ocean waves, waves flow up and down from north to south as they circle the earth. These waves are called atmospheric waves.
And while most of the energy flows horizontally around the Earth, some of the wave energy can move vertically, transferring it up or down, especially as those waves expand.Cohen explains that whenever a waveform is naturally longer in Eurasia compared to the rest of the world in a typical pattern, this has no impact on the stratosphere. But as the already large waves are further enhanced by expanding the Arctic, the energy in the waves can propagate up to the stratosphere and cause chaos.The connection between the warm Arctic covered with low sea ice and expanding jet currents is why Cohen believes climate change leads to SSW more often, but he admits the topic is controversial.