Climatic Change

, Volume 120, Issue 1–2, pp 71–93 | Cite as

Future projections of temperature-related climate change impacts on the railway network of Great Britain

  • Erika J. Palin
  • Hazel E. Thornton
  • Camilla T. Mathison
  • Rachel E. McCarthy
  • Robin T. Clark
  • John Dora
Article

Abstract

Great Britain’s main line railway network is known to experience various temperature-related impacts, e.g. track buckling and overhead power line sag at high ambient temperatures. Climate change could alter the frequency of occurrence of these impacts. We have therefore investigated the climate change impact on various temperature-related issues, identified during workshops with rail industry specialists, using a perturbed physics ensemble (PPE) of the Met Office’s regional climate model (RCM), HadRM3. We have developed novel approaches to combine RCM data with railway industry knowledge, typically by identifying key meteorological thresholds of interest and analysing exceedance of these out to the 2040s. We performed a statistical analysis of the projected changes for each issue, via bootstrapping of the unperturbed PPE member. Although neither the PPE nor the bootstrapping analysis samples the full range of uncertainty in the projections, they nonetheless provide complementary perspectives on the suitability of the projections for use in decision-making. Our main findings include projected increases in the summertime occurrence of temperature conditions associated with (i) track buckling, (ii) overhead power line sag, (iii) exposure of outdoor workers to heat stress, and (iv) heat-related delays to track maintenance; and (v) projected decreases in the wintertime occurrence of temperatures conditions associated with freight train failure owing to brake problems. For (i), the statistical significance varied with track condition and location; for (ii) and (iii), with location; and for (iv) and (v), projected changes were significant across Great Britain. As well as assessing the changes in climate-related hazard, information about the vulnerability of the network to past temperature-related incidents has been summarised. Combining the hazard and vulnerability elements will eventually support a climate risk assessment for the industry.

Supplementary material

10584_2013_810_MOESM1_ESM.pdf (266 kb)
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Copyright information

© © Crown Copyright as represented by: Met Office 2013

Authors and Affiliations

  • Erika J. Palin
    • 1
  • Hazel E. Thornton
    • 1
  • Camilla T. Mathison
    • 1
  • Rachel E. McCarthy
    • 1
  • Robin T. Clark
    • 1
  • John Dora
    • 2
  1. 1.Met Office Hadley CentreExeterUK
  2. 2.John Dora Consulting LimitedCharlburyUK

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