This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: Parts of Earth's climate system can change abruptly once warming pushes them beyond critical thresholds. The Greenland and Antarctic ice sheets, the Amazon rainforest, coral reefs and major ocean currents are all among the systems containing potential climate tipping points.
These climate systems are known as tipping elements, and research into them has expanded rapidly. But it has not expanded evenly. In a new study published in Proceedings of the National Academy of Sciences, colleagues and I examined 20,736 scientific publications on 14 climate tipping elements published between 2000 and 2025.
We wanted to know where scientific attention has accumulated and whether the systems with relatively low estimated warming thresholds tend to receive more of it. The Greenland ice sheet dominates the studies we analyzed. It appeared in 4,141 publications—20% of the entire data set.
By contrast, abrupt thaw of permafrost in boreal forests just below the Arctic appeared in just 139 papers, or 0.7%. The North Atlantic subpolar gyre, a system of ocean circulation south of Greenland, accounted for 649 papers, or 3.1%. Other potential tipping elements, including Barents Sea winter ice and the East Antarctic subglacial basins, also had comparatively little research.
Unequal publication numbers are not, by themselves, surprising. Some parts of the climate system have been observed for longer, are easier to measure or model, or sit within larger and better-established scientific fields. The more revealing comparison is with estimated warming thresholds.
In our study, we compared research attention with published estimates of the level of global warming at which each system might tip. Abrupt boreal permafrost thaw, for example, has a best-estimate threshold of about 1.5°C above preindustrial temperatures. The estimate for the North Atlantic subpolar gyre is around 1.8°C.
Extract — continue reading at the source.
