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Extreme Temperature Events: Trends, Analysis, and Circulation Patterns

This overview presents the aims, data, methods, and results of observations on extreme temperature events. It analyzes daily time series, explores relationships between extremes of temperature, precipitation, and circulation, and validates GCM extremes. The results cover trends in extreme temperature events, spell lengths, and circulation patterns.

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Extreme Temperature Events: Trends, Analysis, and Circulation Patterns

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  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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