Perspectives

This Perspective assesses the global balance between fossil-fuel carbon supply and the sufficiency of carbon stores for climate-change mitigation.

The recent boom in residential solar power is disrupting centralized electricity systems and helping to reduce greenhouse-gas emissions.

This Perspective presents a conceptual framework for extending electricity access while also transitioning to a decarbonized energy system.

Understanding the vulnerability of different US coastal communities to the likely harmful effects of ocean acidification on shellfisheries should inform the development of effective adaptation measures.

Solar radiation management – a form of geoengineering – could be used to cool the planet but has potential risks. A scenario for solar radiation management is proposed that is temporary, moderate and can be adjusted in light of new information.

Lack of progress in global climate change negotiations has revamped interest in polycentric approaches – sub-global mechanisms to reduce greenhouse gas emissions. It is still unclear why these mechanisms might achieve better outcomes than global negotiations. This Perspective outlines themain advantages of polycentric approaches over a global one by reviewing significant theoretical, empirical, and experimental evidence.

Projections and predictions of future climate today generally rely on ensembles of climate model simulations. This Perspective advocates a radically different approach, using numerical weather predictions and knowledge of past weather events.

Those concerned with human responses to climate-related impacts increasingly use resilience as a framing concept. This Perspective critiques dominant approaches to resilience building and advocates a human livelihoods-based path.

The linkage of bottom-up climate policies is now widely favoured over the top-down approach exemplified by the Kyoto Protocol. This Perspective critiques this new received wisdom, and argues for a balance of top-down and bottom-up approaches.

Climate-smart agriculture (CSA) is an approach to the development of agricultural systems intended to help support food security under climate change. This Perspective outlines a set of CSA actions needed from public, private and civil society stakeholders: building evidence; increasing local institutional effectiveness; fostering coherence between climate and agricultural policies; and linking climate and agricultural financing.

Climate change research is necessarily interdisciplinary in nature. This Perspective takes stock of research done at the cutting edge of economics and ecology with the aim of stimulating future collaborative work through the sharing of research methods and insights.

Energy use is crucial for economic development, but drives greenhouse-gas emissions. A low-carbon growth path requires a radical transformation of the energy system that would be too costly for developing nations. Efforts should focus on feasible mitigation actions such as fossil fuel subsidy reform, decentralized access to modern energy and fuel switching in the power sector.

The development and implementation of measures aimed at climate change adaptation face many obstacles. This Perspective takes stock of current research on barriers to adaptation, and argues that more comparative research is now required to increase our in-depth understanding of barriers and to develop strategies to overcome them.

Climate change will impact ocean plankton through changing resources, temperatures and ocean physical processes. This study discusses how climate change could affect the relationship between predators and prey, what it means for population abundunce — whether rapid cell division to form bloom events will occur — and how it could influence the ocean ecosystem.

Future cumulative CO₂ emissions consistent with a given warming limit are a finite common global resource that countries need to share — a carbon quota. Strategies to share a quota consistent with a 2 °C warming limit range from keeping the present distribution to reaching an equal per-capita distribution of cumulative emissions. This Perspective shows that a blend of these endpoints is the most viable solution.

How the global change science community is currently portraying the character and role of the social sciences and humanities is problematic, according to this Perspective. Measures needed to bring other visions and voices into the debate about global environmental change are identified.

The winter of 2013–14 witnessed severe flooding across much of the UK putting pressure on policy makers to improve future planning for periods of torrential rainfall. This Perspective puts the flooding in the context of historical records, critically examines a range of potential causes, and sets out research directions needed to achieve a definitive assessment on the possible human contribution to the flooding.

No-till agriculture is generally considered good for soils, and probably also beneficial in relation to climate change adaptation. However, this Perspective argues that the potential for climate change mitigation through soil carbon sequestration that is possible from a change to no-till agriculture has been widely overstated.

Marine systems around the world are increasingly affected by climate change. This Perspective describes emerging US initiatives aimed at enhancing ocean resilience to climate change. Ocean management issues that would benefit from more systematic consideration of climate information are identified, along with opportunities for advancing partnerships between scientists, policy makers and society to address ocean and climate issues.

Purposeful action leading to significant structural and/or functional changes — known as transformational adaptation — may be required to adapt agriculture to the changing climate. Now, research shows that strong access to knowledge and weak social ties (social capital) empowers individuals to plan and implement novel farming strategies and options.