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UK may experience more cold winters

Date:
April 22, 2010
Source:
University of Reading
Summary:
New research suggests the UK may experience more cold winters in future when the Sun is at a lower level of activity. The amount of radiation emitted by the Sun varies naturally over time and over centuries.

New research from the University of Reading suggests the UK may experience more cold winters in future when the Sun is at a lower level of activity.

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The amount of radiation emitted by the Sun varies naturally over time and over centuries. The scientists measured the magnetic field emanating from the Sun into space to quantify solar activity.

Using records of temperatures dating back to 1659, the study established a connection between lower solar activity and severe winters.

Between 1650 and 1700 there was a prolonged episode of low solar activity which coincided with more severe winters in the UK and continental Europe.

Mike Lockwood, Professor of Space Environment Physics in the Department of Metererology at the University, said: "The UK has experienced relatively mild winters in recent decades, but not this year. Also this year, the Sun fell to an activity level not seen for a century.

"The results relate to a seasonal (winter) and regional (Central England) temperature change and not a global effect. However the work does show how regional or local measurements can show a solar effect and highlights how important it is to avoid trying to make deductions about the global climate from what is seen in just one part of the world."

The paper published in IOP Publishing's Environmental Research Letters, says the cold weather trends during lower solar activity are consistent with solar influence on blocking events in the Eastern Atlantic. Blocking occurs when the warm jet stream from the west on its way to Northern Europe is blocked allowing north-easterly winds to arrive from the Arctic. Blocking episodes can persist for several weeks, leading to extended cold periods in winter.

Professor Lockwood says the trends do not guarantee colder winters but they do suggest that colder winters will become more frequent. He said: "If we look at the last period of very low solar activity at the end of the 17th Century, we find the coldest winter on record in1684 but, for example, the very next year, when solar activity was still low, saw the third warmest winter in the entire 350-year record. The results do show however that there are a greater number of cold UK winters when solar activity is low."

The University of Reading worked in partnership with the Science and Technology Facilities Council Space Science and Technology Department at the Rutherford Appleton Laboratory in Oxfordshire, and the Max-Planck Institute for Solar System Research in Katlenburg-Lindau, Germany.


Story Source:

The above story is based on materials provided by University of Reading. Note: Materials may be edited for content and length.


Journal Reference:

  1. M Lockwood, R G Harrison, T Woollings, S K Solanki. Are cold winters in Europe associated with low solar activity? Environmental Research Letters, 2010; 5 (2): 024001 DOI: 10.1088/1748-9326/5/2/024001

Cite This Page:

University of Reading. "UK may experience more cold winters." ScienceDaily. ScienceDaily, 22 April 2010. <www.sciencedaily.com/releases/2010/04/100422095549.htm>.
University of Reading. (2010, April 22). UK may experience more cold winters. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2010/04/100422095549.htm
University of Reading. "UK may experience more cold winters." ScienceDaily. www.sciencedaily.com/releases/2010/04/100422095549.htm (accessed October 30, 2014).

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