Adaptation

1. Meaning, risk and adaptive capacity

The Intergovernmental Panel on Climate Change defines adaptation in human systems as adjustment to actual or expected climate and its effects, to moderate harm or exploit beneficial opportunities. In natural systems, it refers to adjustment to actual climate and its effects; human intervention may facilitate adjustment to expected climate. Examples include heat-action plans, drought-resilient crops, flood-resilient infrastructure and ecosystem restoration.

Climate risk arises from interactions among climatic hazards, exposure and vulnerability. A cyclone is a hazard; people and assets located along an affected coast constitute exposure. Unsafe housing, poverty, ecosystem degradation and inadequate public services increase vulnerability. Adaptation can reduce exposure through risk-sensitive land-use planning and reduce vulnerability through stronger buildings, social protection and accessible health services.

Adaptive capacity is the ability of people, institutions and ecosystems to adjust, respond and cope. It depends on finance, information, technology, institutions, education and ecosystem health. Vulnerability is therefore socially differentiated: women, small farmers, informal workers, persons with disabilities and marginalised communities may face disproportionate risks. Effective adaptation requires locally appropriate measures rather than a uniform technological solution.

• Resilience concerns the capacity to cope with disturbances while maintaining essential functions and the capacity to adapt, learn and transform.
• Disaster risk reduction overlaps with adaptation, but also covers non-climatic hazards such as earthquakes.

2. Approaches and sectoral applications

Anticipatory adaptation occurs before impacts materialise, such as designing drains for projected rainfall extremes. Reactive adaptation follows experienced impacts. Autonomous adaptation arises from responses by households, firms or ecosystems without a deliberate public adaptation policy; planned adaptation follows a conscious policy decision. Incremental adaptation preserves the basic character of a system, whereas transformational adaptation changes its fundamental attributes, such as shifting livelihood systems where existing activities become unviable.

Adaptation measures may be structural, ecosystem-based, institutional or behavioural. Seawalls and cyclone shelters are structural measures; wetland restoration is ecosystem-based; zoning and building codes are institutional; changing outdoor work schedules during heatwaves is behavioural. Ecosystem-based adaptation uses biodiversity and ecosystem services to help people adapt. Mangroves can reduce coastal wave energy, while urban trees provide shade and cooling. Their performance remains dependent on ecological conditions and hazard intensity.

Agricultural adaptation includes crop diversification, adjusted sowing dates, soil-moisture conservation and climate information services. Water-sector measures include demand management, rainwater harvesting and watershed restoration. Cities require heat-action plans, permeable surfaces, drainage maintenance and climate-resilient housing. Health systems need heat surveillance, disease monitoring and resilient facilities. No-regret measures provide benefits even if projected climate impacts differ from expectations, although their costs and distributional effects still require assessment.

• Insurance and contingency finance can support recovery but do not physically prevent climatic hazards.
• Diversification usually reduces dependence on a single climate-sensitive crop, livelihood or water source.

3. International adaptation governance and finance

The United Nations Framework Convention on Climate Change recognises adaptation alongside mitigation. Its provisions include cooperation on adaptation and assistance to particularly vulnerable developing countries. The Cancun Adaptation Framework, adopted at COP16 in 2010, strengthened adaptation institutions and initiated the National Adaptation Plan process. National Adaptation Plans identify medium- and long-term needs and integrate adaptation into development planning. They differ from National Adaptation Programmes of Action, which focused on urgent and immediate needs of least developed countries.

Article 7 of the Paris Agreement establishes the Global Goal on Adaptation: enhancing adaptive capacity, strengthening resilience and reducing vulnerability to climate change. It recognises adaptation as a global challenge with local through international dimensions. Countries should, as appropriate, submit and periodically update adaptation communications describing priorities, implementation needs, plans and actions. COP28 in 2023 adopted the UAE Framework for Global Climate Resilience, providing thematic and adaptation-cycle targets to guide progress towards this goal.

The Green Climate Fund supports both mitigation and adaptation. The Adaptation Fund finances concrete adaptation projects and programmes in developing countries and permits direct access through accredited national implementing entities. The Least Developed Countries Fund and Special Climate Change Fund are administered by the Global Environment Facility. UNEP’s Adaptation Gap Report 2024 estimated the developing-country adaptation finance gap at US$187–359 billion annually, underscoring the difference between available international public finance and estimated needs.

• The Adaptation Committee promotes coherent implementation of enhanced adaptation action under the UNFCCC.
• Adaptation communications are not identical to Nationally Determined Contributions, although they may be submitted as a component of, or alongside, them.

4. Adaptation governance in India

India’s National Action Plan on Climate Change, launched in 2008, contains eight national missions. Adaptation-relevant missions include the National Water Mission, National Mission for Sustainable Agriculture, National Mission for Sustaining the Himalayan Ecosystem and Green India Mission. State Action Plans on Climate Change translate national priorities into state-specific interventions, reflecting differences among coastal, Himalayan, arid and urban environments.

The National Adaptation Fund for Climate Change supports adaptation activities in states and Union territories particularly vulnerable to climate impacts. Established in 2015–16, it is administered by the Ministry of Environment, Forest and Climate Change, with NABARD as National Implementing Entity. It is a domestic fund and should not be confused with the international Adaptation Fund. India’s updated NDC of 2022 also retains adaptation priorities concerning agriculture, water resources, the Himalayan region, coastal regions, health and disaster management.

Adaptation is implemented through multiple sectors rather than one programme alone. Watershed development, MGNREGA-supported water conservation, resilient agriculture research, cyclone preparedness and municipal heat-action plans can contribute. ICAR’s National Innovations in Climate Resilient Agriculture supports research and demonstrations. Effective delivery requires coordination among ministries, state departments, district administrations and local bodies, supported by climate information and public participation.

• IMD forecasts and warnings support anticipatory action; their effectiveness depends on accessible communication and timely local response.
• Climate-proofing infrastructure requires attention to future climatic conditions, not only historical design standards.

5. Maladaptation, limits and evaluation

Maladaptation means actions that may increase climate-related risks, vulnerability or inequity, now or in the future. A seawall may protect one settlement while worsening erosion elsewhere. Unregulated groundwater extraction may cushion short-term drought impacts but deplete aquifers. Cooling based solely on inefficient air-conditioning can increase electricity demand, emissions and outdoor waste heat while excluding households unable to afford it.

Soft adaptation limits occur when options exist but are not currently available because of constraints such as finance or institutions. Hard limits occur when no adaptive action can avoid intolerable risks. With rising warming, some ecosystems and livelihoods face increasingly severe limits. Loss and damage concerns adverse impacts associated with climate change, including impacts that are not avoided through mitigation or adaptation; it is not simply another name for adaptation.

Assessment should measure outcomes, not merely expenditure or infrastructure built. Useful indicators include reduced heat illness, reliable water access, livelihood stability and ecosystem condition. Monitoring must also test whether benefits reach vulnerable groups and whether risks are transferred elsewhere. Flexible planning, periodic review and community knowledge help avoid locking societies into unsuitable long-lived investments.

• An adaptation gap is the difference between implemented adaptation and the level needed to meet a specified objective.
• Climate-resilient development integrates adaptation and mitigation with sustainable development.

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