What evidence do we have of the singles of climate change,
including an increase in extreme weather events?
· Observing weather has led to key indications of climate change
· As time has progressed weather data has become more reliable.
· On land we measure using thermometers inside Stevenson screens, which shield the thermometers from the direct effects of radiation and rainfall.
· Meteorological temperatures are always measured in the shade, and those are the temperatures weather forecasters predict.
· We regularly collect observation in temperature rainfall ect.
· Sometimes balloons are using to collect a 3d view of weather
· And we have submarines
· Key weather changes of climate change: global mean temperature over land and ocean, recent ocean is warmest overall.
· Steady rise in sea level half due to thermal expansion and half due to melting land ice.
· Melting sea ice does not contribute to sea level rise.
· Temperatures have been highest in polar arctic region.
· The surface of arctic sea ice in summer has dropped from around 4m square kilometres to around 1.5m square kilometres.
· Its difficult to say wither tornados, tsunamis are part of a long term climate change signal or just natural fluctuations.
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