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Most of us learn at
that warm air rises and cool
sinks. This has always appeared to be a
principle of science. However, a study from the University of California, Davis found that there are
in which cool air rises. Researchers discovered that in
atmospheres, cold air rises because of the lightness of water vapour. Apparently, in warmer and more
climates, water particles become more buoyant and can help cooler air rise. Lead researcher Dr Da Yang said: "Water
has a buoyancy effect which helps release the
of the atmosphere to space and reduce the
of warming. Without this lightness of water vapour, the climate warming would be even
."
