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  • Peatlands have historically acted as a carbon sink, but it is unclear how climate warming will affect this. The response of peatland carbon uptake to warming depends on the timing of summer warming; early warming leads to increased CO2 uptake and later warming to decreased uptake.

    • M. Helbig
    • T. Živković
    • S. Zaehle
    Article
  • Non-CO2 effects must be addressed for climate-neutral aviation but are currently ignored in international climate policies. The authors provide a framework with different definitions of climate neutrality, then show how technological and demand-side mitigation efforts can help to achieve these targets.

    • Nicoletta Brazzola
    • Anthony Patt
    • Jan Wohland
    Analysis
  • 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.

    • Felix Ekardt
    • Katharine Heyl
    Comment
  • Changes in the spatial pattern of aerosol could influence climate through effects on radiative forcing. Model experiments show that while aerosol absorption in the midlatitudes and regions of tropical descent can warm the planet, aerosol absorption in regions of tropical ascent can cool the planet.

    • Andrew I. L. Williams
    • Philip Stier
    • Duncan Watson-Parris
    Article Open Access
  • A warmer world will shift mortality patterns around the world. Research suggests that the mortality costs from climate change will be massively larger than previously thought, despite accounting for future adaptation and rising incomes.

    • Maximilian Auffhammer
    News & Views
  • Summits on climate change, organized by various (international) institutions on a frequent basis, seek to discuss and decide on future initiatives for climate action. Research now shows that there is significant variation in their effectiveness in terms of climate mitigation.

    • Zorzeta Bakaki
    News & Views
  • 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.

    • Carrie Arnold
    Feature
  • Falling raindrops have an essential but as yet unquantified role in planetary climate change. An approach to quantifying precipitation efficiency establishes that the way raindrops reach the surface plays an important part in persistent uncertainties over future tropical atmospheric circulation and extreme precipitation.

    Research Briefing
  • Joint initiatives by state and non-state actors launched at climate summits are expected to enhance climate governance. However, those launched at earlier summits often perform better, as do initiatives in areas such as transport, energy and industry and ones with robust institutional arrangements.

    • Sander Chan
    • Thomas Hale
    • Joanes Atela
    Article Open Access
  • Climate change may increase or decrease human migration. Applying an integrated assessment model with migration dynamics to income data, the authors show that the lowest-income groups have mobility reduced by 10–35%.

    • Hélène Benveniste
    • Michael Oppenheimer
    • Marc Fleurbaey
    Article
  • Falling raindrops play an essential but as-yet unquantified role in planetary climate change. Here the authors use the concept of precipitation efficiency to establish that raindrops play a critical role in predicting future tropical atmospheric circulation and extreme precipitation.

    • Ryan L. Li
    • Joshua H. P. Studholme
    • Trude Storelvmo
    Article
  • 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.

    • Kaighin A. McColl
    • Michael L. Roderick
    • Jacob Scheff
    Comment
  • Climate change is expected to impact moisture supply, which is critical for production of food and carbon uptake by terrestrial ecosystems. A shift from ecosystem energy to water limitation is predicted between 1980 and 2100, with implications for ecosystem function under climate change.

    • Jasper M. C. Denissen
    • Adriaan J. Teuling
    • Rene Orth
    Article Open Access