Summer has been a long string of disasters. ONE record heat wave kill hundreds in the Pacific Northwest and Canada. Severe flooding in Germany More than 100 people were killed and hundreds more were missing. Thousands of people have been displaced by floods in China. While, Wildfire is going on is raging across the globe, from California arrive Greek arrive Siberia.
Disasters are happening more frequently and more intensely, just one of the ways the IPCC report says the planet has changed as a result of climate change:
Global surface temperature so far has increased by about 1.1 degrees Celsius compared to the pre-industrial period. This rate of anthropogenic warming is unprecedented for at least 2,000 years.
Heat wave and precipitation events become more frequent and intense worldwide.
Drought is also strengthening.
The upper layers of the ocean have also warmed, ocean acidification has increased, and the amount of Arctic sea ice has decreased.
Heat waves at sea have doubled in frequency since the 1980s.
Global sea level has risen about half a foot high, and the rate of sea level rise is increasing, as a result of glaciers melting and sea water expanding due to heat. The rate of sea level rise observed since 1900 is the fastest in at least 3,000 years.
And at the same time the contraction of so many glaciers globally is unprecedented in at least the last 2,000 years of Earth’s history.
And what happens around if humans don’t stop emitting greenhouse gases into the atmosphere will be much worse.
“With each further increase in global warming, the changes at the extremes continue to become larger,” the summary report said. Extreme heat events, such as heat waves, which occur on average every 10 years in a world without anthropogenic climate change are now about 2.8 times likely to occur. times in a decade.
And if the planet continues to warm, fatal event will be more likely. According to the report, with 1.5 degrees Celsius of warming, extreme heat waves and other phenomena could occur 4.1 times a decade, while a warming of 2 degrees could increase the frequency to 5. ,6 times. The most alarming scenario, 4 degrees warming, will have deadly heat events occurring every year.
And it’s not just extreme heat. For every 0.5 degrees Celsius of warming, the IPCC report warns there is an expected increase in the frequency and intensity of heavy rains, as well as agricultural and ecological drought. More warming also increases the risk of simultaneous disasters, such as heat waves and droughts occurring at the same time.
But while things could go awry, the report highlights that swift and drastic action on climate change could even reverse some of its effects. A rapid effort to not only stop emitting greenhouse gases but also pull them out of the atmosphere, achieving negative emissions, would promote surface temperature inversion and ocean surface acidification.
Unfortunately, not all climate impacts can be stopped. For example, global sea level rise is inevitable. “The mid-20th century sea level change, around 2050, has largely been affected,” said Bob Kopp, co-author of the summary report. “Regardless of how quickly we bring our emissions down, we’re probably looking at a global sea level rise of about 15 to 30 centimeters, or about 6 to 12 inches.”
Beyond this point, he added, “sea-level projections are becoming increasingly sensitive to the emissions choices we’re making today.” Below 2 degrees of warming, sea levels will rise by about 1.5 feet by 2100; below 4 degrees, the water level could rise by more than 2 feet this century.
“Much of the serious impact could be prevented, but it really requires unprecedented transformational change,” Barrett said. “The idea that there is still a way forward, I think, is a point that should give us some hope.”