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  • Recent recognition of the human right to a healthy environment by the United Nations can facilitate a shift in climate policy and shape climate litigation. Now, a recent study discusses these benefits and the potential to assist social movements in garnering political pressure towards stronger climate action.

    • Margaretha Wewerinke-Singh
    News & Views
  • Wealthy countries failed to meet their US$100 billion climate finance pledge, and research now suggests that they may be further away from their goal than previously thought. Machine coding of finance projects may help settle the debate and could be part of a more rigorous tracking system.

    • J. Timmons Roberts
    • Romain Weikmans
    News & Views
  • A reliable and consistent inventory is important for the international community to track and promote the progress of climate finance. A machine learning classifier reveals that the current framework may overestimate the actual number of bilateral climate finance projects.

    • Malte Toetzke
    • Anna Stünzi
    • Florian Egli
    Brief Communication
  • More cities are including urban forests in their climate change adaptation plans. Now, research shows that more than two-thirds of tree species across cities worldwide are facing severe climate risks, undermining their roles in climate adaptation and other ecosystem services they provide.

    • Kangning Huang
    News & Views
  • Assessing 3,129 species of trees and shrubs found in 164 global urban areas shows that over half of the species currently experience non-ideal climates. They project increases in risk due to climate change by 2050 and highlight cities where all species are at risk.

    • Manuel Esperon-Rodriguez
    • Mark G. Tjoelker
    • Rachael V. Gallagher
  • Even if greenhouse gas concentrations in the atmosphere are reduced to pre-industrial levels, the climate system might not return to its previous state. Quantification of the spatial patterns of climate hysteresis and reversibility reveals globally widespread irreversible changes in surface temperature and precipitation in response to anthropogenic CO2 emissions.

    Research Briefing
  • Infrastructure investment needs to account for climate change globally, yet most day-to-day projects are small and poorly served by economic assessment processes. Four simple adjustments to cost–benefit analysis practices would greatly improve decision making for future infrastructure resilience.

    • Russell M. Wise
    • Tim Capon
    • Mark Stafford-Smith
  • The authors use long-term ground and satellite data to reveal the impact of drought on autumn date of foliar senescence (DFS). They link increased drought impacts to precipitation changes and plant functional traits and project earlier DFS by the end of the century, particularly at high latitudes.

    • Chaoyang Wu
    • Jie Peng
    • Quansheng Ge
  • The impact of climate change on tropical Atlantic variability has been elusive, partly due to regional biases in climate models. Now, research shows that current models predict a robust weakening of sea surface temperature variance in the eastern tropical Atlantic, with repercussions for precipitation and climate in the area and beyond.

    • Anna-Lena Deppenmeier
    News & Views
  • Credibility is the cornerstone of international climate pledges; meanwhile, ambition is essential to reach the temperature targets. Research shows the flexibility of Paris agreements encourages countries to be ambitious yet maintain credible.

    • Fei Teng
    News & Views
  • There has been a series of announcements related to climate legislation from the United States of America in recent months. This shift to climate action in the United States sparks hope that its actions could encourage other countries to step up.

  • Forward-looking information about climate risks is critical for decision makers, but the provision and accuracy of such information is limited. Innovative prediction-market designs could provide a mechanism to enhance applied climate research in an incentive-compatible way.

    • Mark Roulston
    • Todd Kaplan
    • Kim Kaivanto
  • The Atlantic Niño is an important mode of tropical climate variability, but how it reacts to climate change is not well known due to model biases. Here the authors show a robust weakening of the Atlantic Niño of up to 24–48% under high emissions until the end of the century.

    • Lander R. Crespo
    • Arthur Prigent
    • Emilia Sánchez-Gómez
    Article Open Access
  • The Atlantic Niño/Niña is an important mode of tropical climate variability, but how it changes with global warming is not clear. Here the authors use a comprehensive model ensemble to show that the Atlantic Niño/Niña system will probably weaken under greenhouse warming.

    • Yun Yang
    • Lixin Wu
    • Tao Geng
  • The success of international climate cooperation relies on whether national commitments are believable under the Paris Agreement. Based on the survey with experienced climate policy professionals, the authors explore the determinants of credibility of national commitments.

    • David G. Victor
    • Marcel Lumkowsky
    • Astrid Dannenberg
    Article Open Access