Iconic Graphs of Climate Change
The bottom line, according to the IPCC (Intergovernmental Panel on Climate Change), which includes thousands of scientists worldwide who review and synthesize studies on basic science, observations, and models:
- Our climate is changing (mostly warming, with more episodic rainfall)
- Humans are responsible for most (but not all)
David Kennedy, editor in chief of Science Magazine:
“Consensus as strong
as the one that has developed around this topic is rare in science”
Keeling Curve CO2 concentrations have been rising at a constant rate (and also fluctuating on a yearly basis)
|Temperature and CO2 fit together.
|Late twentieth century warmth is unprecedented in the last millennium – a result that has held up to a lot of scrutiny
||Many different temperature reconstructions, using many different proxies, all agree: it’s getting warmer.
|There are many Global Circulation Models out there, but they all tell approximately the same story – temperature is rising.
||We may be able to slow warming down with good development policy, but we won’t be able to stop it.
|You need both anthropogenic and natural forcing to accurately model twentieth century temperature.
||What we think of as a heat wave now will be normal summer temperatures within < 100 years.
|Measuring temperature and weather around the world
||Warming and precipitation will NOT be spread evenly around the world.
|The average American causes twice as much CO2 emission as a European, 4-5 times as much as a Chinese person, and 40-100 times as much as an African person
||Emissions from China have overtaken emissions from the US – of course, they have 4 times as many people as we do…
Copyright University of Maryland, 2007
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