Concentrations of N2O, a potent greenhouse gas, are higher than all major model projections.
Nitrous oxide emissions grew 40 percent from 1980 to 2020, accelerating climate change Read More >
Levels of the three most important human-caused greenhouse gases – carbon dioxide (CO2), methane and nitrous oxide – continued their steady climb during 2023, according to NOAA scientists.
No sign of greenhouse gases increases slowing in 2023 Read More >
The U.S. Department of Energy (DOE) has awarded NOAA $5 million to support the conversion of the Mauna Loa atmospheric baseline observatory in Hawaii to
Department of Energy to help NOAA’s Mauna Loa observatory go net-zero Read More >
Atmospheric carbon dioxide measured at Mauna Loa Observatory reached a seasonal peak of 417.1 parts per million for 2020 in May, the highest monthly reading ever recorded. Monthly CO2 values at Mauna Loa first breached the 400 ppm threshold in 2014, and are now at levels not experienced by the atmosphere in several million years.
Rise of carbon dioxide unabated Read More >
