Global temperatures have risen “unprecedented” over the past 150 years, according to an analysis of global temperatures over the past 24,000 years by the University of Arizona, USA, published this Thursday.
Researchers have created maps of global temperatures 200 years apart since the last ice age, about 24,000 years ago, and the results are published this week in the scientific journal Nature, when a world conference on the topic is held in Glasgow, UK. .. climate, KS26.
In their analysis, the researchers found that the main drivers of climate change since the last ice age are the concentration of greenhouse gases and the retreat of ice sheets.
The study points to a general warming trend over the past 10,000 years, and also indicates that the magnitude and rate of warming over the past 150 years is much greater than the magnitude and rate of change over the past 24,000 years.
“This reconstruction assumes current temperatures are unprecedented in 24,000 years, and also suggests that the rate of human-made global warming is higher than anything we saw at the time,” said Jessica Tierney, associate professor at the University and colleagues. … – research coordinator.
The official contributed to the reports of the Intergovernmental Panel on Climate Change (IPCC), published under the auspices of the United Nations, warning of the dangers of global warming.
Matthew Osman, another of the authors of the work, also from the same institution, emphasized that a planet outside of what could be considered normal is “alarming.” And the maps, he added, provide an indication of “how serious climate change is today.”
The research team combined temperature data from marine sediments with computer climate simulations to get the results.
As of Friday in Glasgow, more than 120 political leaders and thousands of experts, activists and decision-makers are discussing (at the 26th Conference of the Parties to the United Nations Framework Convention on Climate Change – COP26) how to avoid rising in global temperatures.
COP26 is being held six years after the Paris Agreement, which aims to limit the rise in global average temperatures by 1.5-2 degrees Celsius above pre-industrial levels.
Despite the commitments made, greenhouse gas concentrations reached record levels in 2020, even with the economic slowdown caused by the COVID-19 pandemic, according to the UN, which estimates that temperatures will ultimately be lower at current emission rates. Art. higher at 2.7 ° C.
