United Kingdom Climate Projections

United Kingdom Climate Projections
Name	United Kingdom Climate Projections
Jurisdiction	United Kingdom
Agency	Met Office
Formed	2009
Chief1 name	Andrew Stunell
Chief1 position	Chief Scientific Advisor
Website	Met Office (archival)

United Kingdom Climate Projections provide nationally coordinated climate projections for the United Kingdom, produced to inform Department for Environment, Food and Rural Affairs, Scottish Government, Welsh Government, and Northern Ireland Executive policy, integrating climate science from the Met Office Hadley Centre, UK Centre for Ecology & Hydrology, British Antarctic Survey, University of Oxford, and Imperial College London. These projections build on international frameworks such as the Intergovernmental Panel on Climate Change assessments, draw on scenarios aligned with the United Nations Framework Convention on Climate Change and Kyoto Protocol legacy, and support planning across institutions including the Environment Agency, Natural England, Crown Estate, and the National Health Service.

Overview

The projections synthesize outputs from multiple modelling centres including the Met Office Hadley Centre, European Centre for Medium-Range Weather Forecasts, National Oceanic and Atmospheric Administration, NASA Goddard Institute for Space Studies, and Max Planck Institute for Meteorology to produce probabilistic guidance for the United Kingdom at national and subnational scales. They provide time-slice outputs for mid-century and late-century periods used by Department for Business, Energy and Industrial Strategy, Ministry of Defence, Transport for London, and local authorities such as Greater London Authority and Glasgow City Council for resilience planning, emergency response, and infrastructure investment. The projections are used alongside observations from the Met Office, UK Met Office Hadley Centre observations, and monitoring networks run by the Centre for Ecology & Hydrology and British Geological Survey.

Methodology and Models

Methodologically the projections combine ensembles from global climate models like those used in Coupled Model Intercomparison Project phases, regional climate models such as UKCP09 and subsequent family models, and downscaling techniques applied by teams at Met Office Hadley Centre, University of East Anglia Climatic Research Unit, University of Bristol, and Cardiff University. They incorporate emissions scenarios linked to representative pathways discussed in Intergovernmental Panel on Climate Change Fifth Assessment Report and later works, with inputs from socioeconomic studies by Office for National Statistics and scenario modelling from Cambridge Centre for Climate Science. Statistical downscaling and dynamical downscaling employ methods refined with expertise from National Centre for Atmospheric Science, Hadley Centre, and international groups at Princeton University and University of Washington.

Key Findings and Projections

Key outputs indicate warming trends consistent with Intergovernmental Panel on Climate Change projections, with mean temperature increases projected for mid-century and late-century under higher emission pathways reflected in analyses by Met Office and Hadley Centre. Projections show increased frequency of extreme heat events affecting regions including London, South East England, and Yorkshire and the Humber, and wetter winter conditions with enhanced river flood risk in catchments monitored by the Environment Agency and Scottish Environmental Protection Agency. Sea level rise estimates reference work by UK Climate Impacts Programme, British Antarctic Survey, and National Oceanography Centre, affecting estuaries such as the Thames Estuary and coastal areas including East Anglia, Cornwall, and Dumfries and Galloway.

Regional and Sectoral Impacts

Regional detail addresses impacts across English regions, Scotland, Wales, and Northern Ireland with sector-specific consequences for agriculture in areas like the Fens and Somerset Levels, for energy infrastructure including sites near Sizewell and ports such as Port of Liverpool, and for transport assets managed by Highways England and Network Rail. Health impacts are assessed in collaboration with Public Health England and the National Health Service, while biodiversity risks reference assessments by Natural England, RSPB, and Plantlife. Urban heat and drainage stress are evaluated for cities including Birmingham, Manchester, Bristol, and Newcastle upon Tyne to guide planning by municipal authorities and bodies such as the Town and Country Planning Association.

Uncertainty and Validation

Uncertainty analysis draws on multimodel ensembles to quantify model structural uncertainty, scenario uncertainty, and internal variability as articulated in studies from Met Office Hadley Centre, HadCRUT dataset, and University of Exeter. Validation uses observational datasets from the UK Met Office, HadCRUT4, British Atmospheric Data Centre, and long-term records curated by institutions like the Royal Meteorological Society and National Physical Laboratory to test hindcasts and bias-correction methods developed with researchers at University of Reading and University of Leeds.

Policy Applications and Adaptation Planning

Projections inform national adaptation strategies such as those implemented by Department for Environment, Food and Rural Affairs and sectoral guidance used by Ministry of Housing, Communities and Local Government, DEFRA flood risk teams, and regulators including the Environment Agency. They underpin investment decisions by utilities like National Grid and water companies such as Thames Water and Severn Trent Water, and feed into resilience frameworks used by Metropolitan Police Service and emergency planners across local resilience forums. Internationally, outputs contribute to reporting under the Paris Agreement and support UK contributions to EU Climate Adaptation Strategy dialogues.

History and Development of the Projections

The projections evolved from earlier assessments including work by the UK Climate Impacts Programme and the Hadley Centre through iterative releases that integrated advances from Coupled Model Intercomparison Project cycles, contributions from universities such as University of East Anglia and University of Southampton, and policy drivers following reviews by parliamentary committees including the Environmental Audit Committee and the House of Lords Science and Technology Committee. Key milestones include the initial consolidated projections, methodological updates responding to Intergovernmental Panel on Climate Change reports, and ongoing refinement with input from research councils such as the Natural Environment Research Council and funding bodies like the Engineering and Physical Sciences Research Council.

Category:Climate change in the United Kingdom