Rising tropical sea surface temperatures alter atmospheric dynamics at heights of 16 kilometers or more.

Preliminary data from two Arctic cruises suggest that rising temperatures are already causing substantial amounts of methane to be released from beneath the ocean floor. But catastrophic gas leaks, like those believed to have occurred 55 million years ago, are unlikely, scientists say.

Delegates to a recent IMO working group meeting were unable to make progress toward an agreement to reduce emissions of greenhouse gases from international shipping.

The EU

Carbon dioxide (CO2) is the principal man-made greenhouse gas and the primary atmospheric component of the global carbon cycle. Precise ground-based measurements of CO2 made since the late 1950s indicate that the atmospheric CO2 concentration has increased from ~310 to over 380 parts per million (ppm) over this period [1].