Study undermines “science is settled” claims

water vapour

Water vapour more significant than CO2?

A study released last year reveals water vapour has an important role in global warming and more research is needed. When water vapour declines it seems to lead to global cooling, preventing overheating.

The story was covered in The Guardian on 29 January, 2010:

Water vapour caused one-third of global warming in 1990s, study reveals

Experts say their research does not undermine the scientific consensus on man-made climate change, but call for ‘closer examination’ of the way computer models consider water vapour.

Scientists have underestimated the role that water vapour plays in determining global temperature changes, according to a new study that could fuel further attacks on the science of climate change.

The research, led by one of the world’s top climate scientists, suggests that almost one-third of the global warming recorded during the 1990s was due to an increase in water vapour in the high atmosphere, not human emissions of greenhouse gases. A subsequent decline in water vapour after 2000 could explain a recent slowdown in global temperature rise, the scientists add. Continue Reading →