Detective cases
Short guided investigations you can watch step by step. Every result is computed live from the data.
Is everywhere warming at the same speed?
Compare 46 years of thermometer records (NASA GISTEMP) in the Siberian Arctic and the Amazon rainforest.
3 steps · comparing rates · °C per decade · long records
Same variable, opposite stories?
Rain belts can shift, so one region may get wetter while another gets drier. Test rainfall on both sides of the Sahara.
3 steps · comparing regions · reading significance
Following the water in the Amazon
Rain falls, plants send some back to the air, and the rest soaks in. Do all three parts of the water cycle move together?
3 steps · linking variables · units
Does a longer record change the verdict?
A trend that is not significant over a few years can become significant with more data, or vanish. Test summer temperatures in the US Southwest.
2 steps · significance · record length · seasons