Scientists Extreme Weather – Scientists say that future heat waves will increase as other extreme weather conditions including heavier rainfall, more floods, stronger cyclones, landslides and more intense droughts are likely across the globe. They blame it on global warming as the Earth’s climate warms.
The U.N. Intergovernmental Panel on Climate Change (IPCC) urged countries to make disaster management plans to adapt to the growing risk of extreme weather linked to human-induced climate change, in a report released in Uganda.
The report gives differing probabilities for weather events based on future greenhouse gas emissions scenarios, but the thrust is that extreme weather is likely to increase and that the likely cause is humans.
The IPCC defines “likely” as a 66-100 percent probability, while “virtually certain” is 99-100 percent.
“It is virtually certain that increases in the frequency and magnitude of warm daily temperature extremes … will occur in the 21st century on the global scale,” the IPCC report said.
“It is very likely that the length, frequency and/or intensity of … heat waves will increase,” it added.
“A 1-in-20 year hottest day is likely to become a 1-in-2 year event by the end of the 21st century in most regions,” under one emissions scenario.
An exception is in very high latitudes, it said. Heat waves would likely get hotter by 1-3 degrees Celsius by mid-21st century and by 2-5C by late-21st century, depending on region and emissions scenario, it said.
Delegates from nearly 200 countries will meet in South Africa from November 28 for climate talks with the most likely outcome modest steps towards a broader deal to cut greenhouse gas emissions to fight climate change.
The risks posed by increasingly erratic weather have been highlighted by a spate of disasters in recent years, such as flooding in Thailand and Australia, droughts in east Africa and Russia and hurricanes in the Caribbean. Scientist blame this problem on increasing carbon emissions.
Droughts, perhaps the biggest worry for a world with a surging population to feed, were also expected to worsen.
The global population reached 7 billion last month and is expected to reach 9 billion by 2050, according to U.N. figures.