Scientists have discovered that when more carbon dioxide is released into the atmosphere, it becomes a more potent greenhouse gas.
Image credit: NASA
This new research University of Miami Rosenstiel Marine School science This week, world leaders gather in Dubai, United Arab Emirates, for the United Nations Climate Change Conference, COP28.
Our findings mean that as the climate responds to increases in carbon dioxide, carbon dioxide itself becomes a more potent greenhouse gas. It is further confirmed that carbon emissions must be curbed sooner or later to avoid the most severe impacts of climate change.
Brian Soden, senior study author and professor at the University of Miami Rosenstiel School of Marine and Atmospheric Sciences
In this study, the effects of increased CO2 The stratosphere is a region in the upper atmosphere that is known to cool as carbon dioxide rises.2 Concentrations were investigated using state-of-the-art climate models and additional equipment. It was discovered that the cooling of the stratosphere increases the heat trapping effect due to the subsequent increase in CO.2making it a more powerful greenhouse gas.
Scientists have long believed that radiative forcing, or the amount of heat trapped in the atmosphere as a result of a proportional increase in CO, is:2– It was a constant that did not change over time.
This new discovery shows that the radiative force is not constant, but changes as the climate responds to increases in carbon dioxide.
Ryan Kramer, physicist, National Oceanic and Atmospheric Administration, Geophysical Fluid Dynamics Laboratory
Carbon dioxide causes global warming by retaining thermal energy within the climate system.
Future CO increase2 This would have a stronger warming effect on the climate than comparable increases in the past. This new understanding has important implications for the interpretation of past and future climate change and suggests higher carbon dioxide concentrations.2 Climate may be inherently more sensitive to low carbon dioxide2 climate.
Haozhe He, lead study author and doctoral student, University of Miami
This work is supported by the Coupled Model Intercomparison Project (CMIP), which provides a set of coordinated experiments run by dozens of the world’s most comprehensive climate models to support IPCC assessments. provided. The research team also conducted several “offline” radiant flux estimates using highly accurate radiative transfer and analytical models to make definitive discoveries outside the simulated world of climate models. Did.
This research science Diary of December 1stcentCo-authors of the study are Nadir Jeevanjee of NOAA’s Geophysical Fluid Dynamics Laboratory;
NOAA grants NA18OAR4310269 and NA21OAR4310351) and the National Aeronautics and Space Administration (Science of Terra, Aqua, and Suomi-NPP NASA grant 80NSSC21K1968) sponsored this research.
Reference magazines:
He, H. Such. Al. (2023) State dependence of CO2 Forcing and its impact on climate sensitivity. science. doi:10.1126/science.abq6872
sauce: https://www.miami.edu/
