Original title: Radiative and Dynamical Controls on the Land-Ocean Warming Contrast in Climate Models
Paolo Giani, Arlene M. Fiore, Raffaele Ferrari, Paul A. O'Gorman +2 · September 2026
As greenhouse gases trap heat, land heats up much faster than the ocean. Scientists usually explain this land-ocean warming contrastThe difference in how much land and ocean surfaces heat up under global warming. using either energy balances or large-scale atmospheric motions. The authors combined both views by looking at how the atmosphere moves moist static energy, which is the total heat and moisture carried by air. They used this idea to build a simple model that mimics 22 major climate models. They found that warming over land versus ocean depends on local heat effects balancing against atmospheric energy transport that pushes heat toward land. This balance creates two groups linked to climate sensitivityHow much the global temperature rises in response to a doubling of carbon dioxide in the atmosphere., which is how strongly a model warms. In low-sensitivity models, local ocean energy effects directly make land warm more. In high-sensitivity models, ocean effects alone would warm the ocean more, but strong energy transport shifts the warming back over land. The differences between models depend on this land-ocean energy ratio.
Imagine two pots of water on a stove, one metal and one ceramic. They heat up at different rates because of how they absorb heat and how water circulates inside. Here, the land and ocean warm differently due to how the atmosphere radiates heat and how it transports energy, similar to the pots' properties and water movement.
This helps scientists predict how land and ocean temperatures will change differently, which affects weather, agriculture, and sea level rise. It also reduces uncertainty in climate models used for policy decisions.
The abstract doesn't specify if this framework applies beyond CMIP6 models or under different climate scenarios. It focuses on explaining model spread rather than making new predictions about actual future warming.
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Radiative and Dynamical Controls on the Land-Ocean Warming Contrast in Climate Models — Paolo Giani, Arlene M. Fiore, Raffaele Ferrari et al.
Abstract licence: CC0
Explanation generated by Synthesis from the abstract — it is not the original paper. This is a preprint, so it hasn't necessarily been peer reviewed.