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Is the climate changing? The way you present the data affects your judgment Chris Goodall At Magdalen College School, Oxford March 2010.

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Presentation on theme: "Is the climate changing? The way you present the data affects your judgment Chris Goodall At Magdalen College School, Oxford March 2010."— Presentation transcript:

1 Is the climate changing? The way you present the data affects your judgment Chris Goodall At Magdalen College School, Oxford March 2010

2 Oxford 1971–2000 averages Oxford (63 m AMSL) Max TempMin Temp Days of Air Frost SunshineRainfall Days of Rainfall 1mm Wind at 10 m Month[°C] [days][hours][mm][days][knots] Jan N/A Feb N/A Mar N/A Apr N/A May N/A Jun N/A Jul N/A Aug N/A Sep N/A Oct N/A Nov N/A Dec N/A Year N/A Source: Met Office Average

3 Oxford Location: 4509E 2072N, 63 metres amsl Estimated data is marked with a * after the value. Missing data (more than 2 days missing in month) is marked by -- Sunshine data taken from an automatic Kipp & Zonen sensor marked with a #, otherwise sunshine data taken from a Campbell Stokes recorder. yyyy mm tmax tmin af rain sun degC degC day mm hours Source: Met Office Source data available online

4 Oxford average daily maximum temperatures for three periods Source: Met Office

5 Oxford average daily minimum temperatures for three periods Source: Met Office

6 Average daily maximum (degrees Celsius) Average daily minimum (degrees Celsius) Summary Oxford data Source: Met Office

7 Number of months in year with over 100mm rainfall Source: Met Office

8 Number of months in year with over 100mm rainfall Source: Met Office

9 Number of months in year with over 100mm rainfall Source: Met Office

10 Number of months in year with over 100mm rainfall Source: Met Office

11 Number of months in year with over 100mm rainfall Source: Met Office

12 Number of airfrost days per year Source: Met Office

13 Number of airfrost days per year Source: Met Office

14 April airfrost days Source: Met Office

15 Average daily July maximum temperatures Source: Met Office

16 Average daily July maximum temperatures Source: Met Office

17 Average daily July maximum temperatures Source: Met Office

18 Average daily July maximum temperatures Source: Met Office

19 Average daily January minimum temperature Source: Met Office

20 Average daily January minimum temperature Source: Met Office

21 Average daily January minimum temperature Source: Met Office

22 Average daily January minimum temperature What did this chart look like five years ago? Source: Met Office

23 2010 * Average daily January minimum temperature And what about this year? Source: Met Office

24 Average daily maximum (degrees Celsius) Average daily minimum (degrees Celsius) Summary Oxford data Source: Met Office


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