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It also outlines a need to make hydrogen energy cheaper and to focus on regional hubs.

Climate study says it’s too late to save summer Arctic sea ice | The Hill

The research indicates that even under a scenario where carbon emissions are sharply curtailed, the Arctic will be “practically” ice-free in September by the middle of the 21^st century. The study’s projection goes even further than the warning issued in 2021 by the United Nations’ Intergovernmental Panel on Climate Change (IPCC), which determined there is still a chance to save the summer ice in a scenario where warming is kept below 2 degrees Celsius.

The research is also more pessimistic about the speed of ice loss, predicting the loss of summer ice by the 2030s, as opposed to the IPCC projection of the 2040s under a high- or intermediate-emissions scenario.

Carbon dioxide levels measured at NOAA’s Mauna Loa Atmospheric Baseline Observatory peaked at 424 parts per million in May, continuing a steady climb further into territory not seen for millions of years, scientists from NOAA and Scripps Institution of Oceanographyoffsite link at the University of California San Diego announced today. 

Measurements of carbon dioxide (CO₂) obtained by NOAA’s Global Monitoring Laboratory averaged 424.0 parts per million (ppm) in May, the month when CO₂ peaks in the Northern Hemisphere. That is an increase of 3.0 ppm over May 2022, and represents the fourth-largest annual increases in the peak of the Keeling Curve in NOAA’s record. Scientists at Scripps, which maintains an independent record, calculated a May monthly average of 423.78 ppm , also a 3.0 ppm increase over their May 2022 average.

Carbon dioxide levels are now more than 50% higher than they were before the onset of the industrial era.