This year, the main reason is that the subtropical high is too strong, and the areas controlled by the subtropical high are often dominated by sunny and cloudy high-temperature weather. This year, the subtropical high is too strong. It covers a wide area and lasts for a long time. The sun is not blocked by clouds. Pingchang is just in the control zone of the subtropical high, so it is the reason for the high temperature. I sorted out why the weather is so hot this year. Welcome to learn from it.
Why is it so hot this year
From the big background
In recent years, affected by global warming, the frequency and intensity of extreme high temperature events in the northern hemisphere are higher.
From the perspective of direct factors
Atmospheric circulation anomaly is an important factor for the occurrence and persistence of high temperature in different regions.
Specifically
The rapid development of high temperature in eastern China from June to July this year is due to the stronger and westward subtropical high in the Western Pacific than in the same period of the year.
The high temperature in Europe in late June is due to the stable control of the high-pressure ridge, and the downdraft prevails for a long time, dominated by clear sky radiation.
"Cooking mode" is the result of the interaction of background and direct factors. Climate change is really affecting every corner of the world. It is urgent to deal with global warming.
The fifth assessment report of the United Nations Intergovernmental Panel on climate change (IPCC) pointed out that with the further intensification of global warming in the future, extreme warm events will increase in most land areas of the world, extreme cold events will decrease, and high-temperature heat waves will occur more frequently and longer.
If the emission of man-made greenhouse gases is not controlled, extreme high temperature events will be stronger, more frequent and last longer all over the world. According to the current growth rate of greenhouse gases, the global land area will be hot by the end of the 21st century