News & Comment

Northern expansion is often seen as a solution to climate-driven agricultural challenges in lower latitudes, yet little is known about cultivation–permafrost interactions. We outline four science-based adaptations, informed by farmer knowledge, that reduce risk and inform decisions to sustainably manage and develop permafrost-agroecosystems.

Climate and freedom are interconnected in various ways. The recent German verdict on climate protection realigned the fundamental rights in liberal democratic societies and marks an important step in climate litigation around the world.

As deaths attributable to climate change increase, there has been a call from some scientists for the inclusion of climate-related data on death certificates. However, others argue that there are more important methods to reduce the impacts of climate extremes on people.

Climate model projections of the terrestrial water cycle are often described using simple empirical models (‘indices’) that can mislead. Instead, we should seek to understand climate model projections using simple physical models.

Ecosystem services are often omitted from climate policy owing to difficulties in estimating the economic value of climate-driven ecosystem changes. However, recent advances in data and methods can help us overcome these challenges and move towards a more comprehensive accounting of climate impacts.

The expansion of urban environments contributes to climate change and biodiversity loss. Implementing nature-based strategies to create ‘regenerative living cities’ will be critical for climate change mitigation and adaptation and will produce measurable biodiversity and wellbeing co-benefits.

Ecosystems, and the services they provide, can support climate mitigation and adaptation, yet also suffer from climate change impacts. Now, discussions surround how to best support the eco–climate nexus, overcoming the challenges ahead and creating multiple benefits.

Incorporating the carbon services of wild animals into financial markets has the potential to benefit both climate and conservation through the development of carbon offsets that are equitable and nature positive. However, for this paradigm to be successful, many challenges regarding science, finance and law still need to be overcome.

It is now possible to model the climate system at the kilometre scale, but more work and resources are needed to harvest the full potential of these models to resolve long-standing model biases and enable new applications of climate models.

Sharp fronts and eddies that are ubiquitous in the world ocean, as well as features such as shelf seas and under-ice-shelf cavities, are not captured in climate projections. Such small-scale processes can play a key role in how the large-scale ocean and cryosphere evolve under climate change, posing a challenge to climate models.

Current global climate models struggle to represent precipitation and related extreme events, with serious implications for the physical evidence base to support climate actions. A leap to kilometre-scale models could overcome this shortcoming but requires collaboration on an unprecedented scale.