Reliable climate forecasts are only possible if all the factors that affect the climate are known.
Comment: True.
It is therefore necessary to find out what caused global warmings in the past.
Comment: Uhm, isn't it therefore necessary to find out what's causing 'global warming' NOW??
One hypothesis is, for example, that increased volcanic activity during the widening of the North Atlantic triggered a rapid warming, the so-called Paleocene Eocene Thermal Maximum (PETM), 54 million years ago.
A research team from Germany, Mexico, Switzerland, Norway and Taiwan is currently conducting a cruise on the German vessel Sonne in the Guaymas Basin in the Gulf of California to test this hypothesis. The Guaymas Basin is thought to be in a similar state of rifting as the North Atlantic at the end of the Paleocene.
Comment: Perhaps, but more importantly, these vents are opening up all over the place:
Earth opening up: Erupting volcanic vents found in Antarctic waters
Real source of CO2 increase: Erupting volcanic vent field discovered in Caribbean Sea













Comment: Scientists are strange creatures. From the above article, you'd think that this team's discovery was unique. But just a few weeks earlier, another research team discovered a different erupting volcanic vent field in another Gulf of California basin. If we can find out about each one, why can't they find each other?? To understand what's really going on, read this:
Volcanic eruptions, rising CO2, boiling oceans, and why man-made global warming is not even wrong