The Earth's oceans are warming
- According to NASA, "The oceans have absorbed much of this increased heat, with the top 700 meters (about 2,300 feet) of ocean showing warming of 0.302 degrees Fahrenheit since 1969." NASA cites a paper published in the journal Geophysical Research Letters.
- "Climate change: How do we know?".
- Levitus, et al, "Global ocean heat content 1955–2008 in light of recently revealed instrumentation problems," Geophys. Res. Lett. 36, L07608 (2009).