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Overview

Observations of Extreme Temperature Events. Overview. Aims Data Methods Results. CRU Symposium on Weather Extremes, 2 April, 2003. Observations of Extreme Temperature Events. Aims. Analysis of observed daily time series Relate changes in extremes to changes in mean

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Overview

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Presentation Transcript

  1. Observations of Extreme Temperature Events Overview • Aims • Data • Methods • Results CRU Symposium on Weather Extremes, 2 April, 2003

  2. Observations of Extreme Temperature Events Aims • Analysis of observed daily time series • Relate changes in extremes to changes in mean • Seek relationships between extremes of temperature and precipitation and extremes of circulation • Validation of GCM extremes CRU Symposium on Weather Extremes, 2 April, 2003

  3. Observations of Extreme Temperature Events Data • Central England Temperature (max. and min. series) • IMPROVE European Temperature Data • UKMO gridded daily SLP fields (10o x 5o) • UK daily precipitation data (station & regional) CRU Symposium on Weather Extremes, 2 April, 2003

  4. Observations of Extreme Temperature Events Methods • Gamma distribution defined percentiles - 4 extreme series • Frost day extremes • Spell days CRU Symposium on Weather Extremes, 2 April, 2003

  5. Observations of Extreme Temperature Events Results - Extreme Trends CETMIN10 (spells) CETMIN10 CETMIN90 CETMIN90 (spells) CETMAX10 (spells) CETMAX10 CETMAX90 CETMAX90 (spells) CRU Symposium on Weather Extremes, 2 April, 2003

  6. Observations of Extreme Temperature Events Results - Spell Lengths CRU Symposium on Weather Extremes, 2 April, 2003

  7. Observations of Extreme Temperature Events Results - Circulation • Gridded daily SLP fields • 3 air flow indices - flow strength, vorticity & flow direction (Jenkinson & Collison) CRU Symposium on Weather Extremes, 2 April, 2003

  8. Observations of Extreme Temperature Events Results - Circulation CRU Symposium on Weather Extremes, 2 April, 2003

  9. Observations of Extreme Temperature Events Results - Circulation CRU Symposium on Weather Extremes, 2 April, 2003

  10. Observations of Extreme Temperature Events Results - Circulation CRU Symposium on Weather Extremes, 2 April, 2003

  11. Observations of Extreme Temperature Events Results - Circulation CRU Symposium on Weather Extremes, 2 April, 2003

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