Why is it getting hotter and hotter now? Why did the ice and snow in the Arctic melt?

The melting speed of Arctic sea ice is closely related to carbon dioxide emissions. Arctic sea ice melts faster than previously expected. If greenhouse gas emissions are not controlled, Arctic sea ice will disappear completely. Oceanographer John Jungclaus said that if greenhouse gases continue to increase, the global temperature will rise sharply and the Arctic sea ice will decrease sharply. By the middle and late of this century, people will not see sea ice in summer. If the situation continues to deteriorate, even in winter, Arctic sea ice will eventually disappear. According to him, if the global temperature rise is controlled within 2 degrees Celsius, the Arctic sea ice will still decrease, but it will not disappear completely, "at least not in the summer of 2 1 century". Jochem Roscoe, director of the Max Planck Institute for Meteorology, said that the climate model shows that if carbon dioxide emissions continue to increase indefinitely, the global average temperature will rise by 4 degrees Celsius by 2 100, and then the world will usher in more persistent extreme high temperature weather. In fact, the increase of carbon dioxide will not only lead to climate warming, but also accelerate the acidification of seawater. According to Ron Klaus, due to the increase of carbon dioxide emissions, the acidity of seawater today is 30% higher than that before industrialization. Acidification of seawater may cause fatal blow to some marine life. Source: Invention and Innovation (Comprehensive Edition)