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Why Were 2023 and 2024 So Hot?

Union of Concerned Scientists

The year 2023 was by far the warmest in Earths recorded history, and perhaps in the past 100,000 years , shattering the previous record set in 2016 by 0.27C (0.49F). In that year, El Nio added to the increased warming caused by the build-up of heat-trapping emissions in the atmosphere, leading to that record-breaking heat.

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​​The Science Behind Sea Level Rise: How Past Emissions Will Shape Our Future

Union of Concerned Scientists

Research with climate models in recent years shows that when carbon dioxide emissions stop, the rise in atmospheric temperatures will likely also stop. This means that there would be no additional warming of the atmosphere from carbon dioxide itself, but the many complex systems on Earth will continue to respond to the heat already trapped.

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WMO: Update on 2023/4 Anomalies

Real Climate

since the 1850-1900 baseline is very clearly associated with the increases in greenhouse gases, slightly (and decreasingly) modulated by the changes in atmospheric pollution. Dessler, "Evolution of the Climate Forcing During the Two Years After the Hunga TongaHunga Ha'apai Eruption", Journal of Geophysical Research: Atmospheres , vol.

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The definitive CO2/CH4 comparison post

Real Climate

The radiative forcing from these changes in concentrations can be easily calculated using standard formulas (from Etminan et al, 2016 which supersede the slightly simpler ones from IPCC TAR), as about 2 W/m 2 for the CO 2 change and 0.65 W/m 2 for CH 4. In contrast, methane has a perturbation time-scale of about 12 years. Highwood, and K.P.

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Inferno-like exoplanet has ionized calcium in its atmosphere

Physics World

Signatures of ionized calcium in the upper atmosphere of an ultra-hot, Jupiter-like exoplanet have been found by international team of astronomers led by Emily Deibert at the University of Toronto. First discovered in 2016, WASP-76b has about the same mass as Jupiter and has a radius almost twice as large.

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New misguided interpretations of the greenhouse effect from William Kininmonth

Real Climate

When looking at the effect of changes in greenhouse gases, one must look at how their forcing corresponds to the energy balance at the top of the atmosphere. 679-688, 2016. Another weak point is Kininmonth’s assumption of the water vapour being constant and at same concentrations as in the tropics over the whole globe. References.

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The CO2 problem in six easy steps (2022 Update)

Real Climate

The fact that there is a natural greenhouse effect (that the atmosphere restricts the passage of infra-red (IR) radiation from the Earth’s surface to space) is easily deducible from; i) the mean temperature of the surface (around 15ºC) and, ii) knowing that the planet is normally close to radiative equilibrium. in IPCC TAR).

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