Cities affect temperature a thousand miles away

Large cities can affect the weather as far as 1,000 miles away, say scientists, warming some areas and cooling others.

Little Ice Age triggered by volcanic eruptions

The Little Ice Age - the centuries-long period of cooling that began in the Middle Ages - appears to have been triggered by four massive volcanic eruptions in the tropics.

Deep oceans store heat from global warming - for a while

The deep oceans can absorb enough heat to mask the effect of global warming for a decade at a time, say scientists at the National Center for Atmospheric Research (NCAR).

Pole-to-pole flights give new picture of greenhouse gases

A three-year series of research flights from the Arctic to the Antarctic comes to an end this week, completing an unprecedented survey of greenhouse gases in the atmosphere.

Arctic summer ice could increase before it disappears

If climate change continues, summer sea ice in the Arctic could disappear altogether - but in the meantime Arctic ice could temporarily stabilize or even increase.

Why does it rain more near airports?

Areas around airports experience more rain and snow, say researchers, as planes trigger precipitation by flying through clouds.

US to face severe droughts, study finds

The US may be set for severe and prolonged droughts in the coming decades, a new government study has found.

Slowing population growth could have big effect on emissions

A new study from the National Center for Atmospheric Research and other bodies aims to quantify the effects of population growth on carbon dioxide emissions, and concludes that it could make a big difference.

Strong winds could have parted Red Sea for Moses

A new computer model has indicated that the parting of the Red Sea could really have taken place - if the winds were right.

Chance observation solves mystery of 'hole-punch' clouds

Strange circular holes in clouds which have frequently led to speculation about UFOs are caused by nothing more mysterious than aircraft, a study has shown - and they can cause several inches of snow or rain too.   

Half of Earth's trapped heat can't be found

Half the heat believed to have built up on Earth in recent years can't be accounted for.

Monsoon spreads pollution right through the stratosphere

The Asian monsoon is sending pollutants up to stratospheric heights and spreading them right across the globe, says the National Center for Atmospheric Research (NCAR).