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Methane is 30% Less Effective as GHG. 45% less warming. [1]

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Date: 2023-04-10

Surface Warming And Wetting Due to Methane's Long Wave Radiative Effects Muted By Short-Wave Absorbtion

This link is to the research article published in Nature just last month. The world’s best and most respected peer-reviewed science journal.

Its conclusion is that methane is 30% less effective as a GHG than previously reported and climate models reflecting this new data show a 45% reduction in climate warming.

If climate models that incorporate this data show a 45% reduction in global warming effects caused by GHGs, then what is heating the earth?

Im going to include the list of author’s at the top here because these people represent the top of the game in climate research.

Cynthia A. Randles ExxonMobil Technology and Engineering Company, Annandale, NJ, USA Present address: UNEP International Methane Emission Observatory, Paris, France Robert J. Allen & Xueying Zhao Department of Earth and Planetary Sciences, University of California, Riverside, CA, USA Ryan J. Kramer Climate and Radiation Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA Goddard Earth Science Technology and Research II, University of Maryland at Baltimore County, Baltimore, MD, USA Bjørn H. Samset CICERO Center for International Climate and Environmental Research in Oslo, Oslo, Norway Christopher J. Smith School of Earth and Environment, University of Leeds, Leeds, UK International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria

Using targeted climate model simulations, we have shown that methane SW absorption and the associated ADJs act to reduce its ERF by ~20% and mute its warming and wetting effects in coupled simulations by up to 30% and 60%, respectively... ...The indirect assessment of multiple models from PDRMIP CH 4 simulations supports our findings18. In fact, expanding on the results of ref. 18, we find a 20% decrease in ERF, 45% less warming and 65% less wetting in models that include CH 4 SW absorption versus those that do not

We find that methane short-wave absorption counteracts ~30% of the surface warming associated with its long-wave radiative effects. An even larger impact occurs for precipitation as methane short-wave absorption offsets ~60% of the precipitation increase relative to its long-wave radiative effects. The methane short-wave-induced cooling is due largely to cloud rapid adjustments, including increased low-level clouds, which enhance the reflection of incoming short-wave radiation, and decreased high-level clouds, which enhance outgoing long-wave radiation. The cloud responses, in turn, are related to the profile of atmospheric solar heating and corresponding changes in temperature and relative humidity.

It points out that this absorption resulting in a 30% reduction is not included in most climate models.

Recent studies14,15,16,17 have highlighted the importance of CH 4 short-wave (SW) absorption at near-infrared wavelengths—which is lacking in many climate models1—

So… what does all of this mean? It turns out that A LOT of what we have been told about climate change… is not true. A 45% reduction in warming effect means that 100% of models that dont factor in this data… are wrong. See the bolded text above.

This brings up the question… if the climate models that include this new data show a 45% REDUCTION in heating effects than those that do… then it becomes clear that methane as greenhouse gas is NOT the source of the heating.

PS: The title picture provides the hint to the question of where the extra heating is coming from: Its electromagnetism from the sun.

PSS: Tropospheric heating caused by the burning of fossil fuels is definitely real. It is just not the only thing affecting our climate.

PSS: Im writing this diary because of a user who compared me to Alex Jones and then flagged my comment posting this link. This diary is about an article posted to Nature and represents the best and most current understanding in science today. Im sorry if the information you were told is old. Keep up to date.

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[1] Url: https://www.dailykos.com/stories/2023/4/10/2163207/-Methane-is-30-Less-Effective-as-GHG-45-less-warming

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