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Weather: space & time differences. Prof. Grant Bigg, Head, Department of Geography, University of Sheffield. The Climate System. (Naturally varying). The Climate System. (directly anthropogenically varying). The Climate System. Differences (or variability) over different timescales.

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weather space time differences

Weather: space & time differences

Prof. Grant Bigg, Head, Department of Geography, University of Sheffield

differences or variability over different timescales
Differences (or variability) over different timescales
  • Millennial
  • Centennial
  • Decadal
  • Interannual
  • Seasonal
  • Daily
  • Hourly
centennial change
Centennial change

Fig. 6.10 IPCC (2007)

decadal change
Decadal change

Global surface air temperature

(IPCC Fig. 3.6)

interannual change
Interannual change

Central England Temperature

(from www.metoffice.gov.uk/hadobs)

oC

seasonal change
Seasonal change

oC

Central England Temperature 2009-2011

(from www.metoffice.gov.uk/hadobs)

daily change
Daily change

Central England Temperature 2012

(from www.metoffice.gov.uk/hadobs)

hourly change
Hourly change

Let’s look at Google Earth’s weather overlays for hourly variation

Then go to spatial scales

slide13
Stop slide show
  • Go to Google Earth (pre-set to Weather & Terrain only)
  • Expand weather layer
  • Comment on cloud patterns observed over eastern Atlantic
  • Click cloud animation in Temporary Places
  • Turn off weather layer
slide14
Drag play pointer slowly along describing time evolution and introducing spatial scales
  • Go to yesterday evening and zoom to UK or some other region where overnight variation
  • Point to reduced scale and zoom in to area
  • Move through sequence commenting on what it reveals about space and time scales
slide15
Go over UK if not there
  • Turn on weather layer
  • Draw attention to weather data and temperature
  • Zoom in to bring more stations
  • Click on station – note features (and that probably from analysis, not real data)
slide16
Click on hourly and details to give hour by hour step
  • Note forecast only, from US Weather Channel
  • Remove and note spatial limitations of this detailed data to major towns
  • Now switch to radar data and move to clear rainfall zone
slide17
Note 3 hour 30 minute delay between radar and cloud (radar ahead) – hence mismatch in patterns
  • Activate radar animation
  • Follow through, discussing spatial and temporal scales
sources of data or ideas
Sources of data or ideas
  • Royal Meteorological Society MetLink site (www.metlink.org)
  • Meteorological Office Weather Observations Website (wow.metoffice.gov.uk/home)
slide19
Suggestions For Weather Space- Time Differences Questions That Can Be Explored With Student Observations
  • Variation over time at home (hourly, daily or longer)
  • Variation over school catchment at same time (synoptic view)
  • For those with solar panels – how does power generation relate to cloudiness?
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