What’s causing the cold winter?
January 8th, 2010 | by Nick |

The Met Office have published this account of what is causing this freezing start to the year. Basically, our winds in winter (particularly in the last 20 years) normally come from the south-west. This means air travels over the relatively warm Atlantic and so have brought mild conditions to the UK. But for the past three weeks theAtlantic air has been ‘blocked’ and cold air has been flowing down from Greenland or the cold winter landmass of Europe. Scientists call this contrast “warm-ocean cold-land phenomenon”.
The Met also note although the mean UK temperature for December was 2.1 °C, making it the coldest for 14 years and colder than the long-term average for December of 4.2 °C, December was one of only two months in 2009 which had a below-average mean temperature. In the UK, 2009 as a whole was the 14th-warmest on record (since 1914). This above-average temperature trend was reflected globally, with 2009 being the fifth-warmest year on the global record (since 1850).
Climate and weather ain’t the same thing.
Some possibly unrelated posts
The oldest osprey of the UK – and probably the world – has returned to her eyrie in the Scottish highlands. When she left for West Africa at the end of last summer, no one expected her to return. At 26 she’s lived 3 times longer than most female ospreys. In her life she’s laid 58 eggs and hatched 48 chicks, a massive individual contribution to the survival of ospreys in Scotland, where there are still only about 200 breeding pairs. The questions now are if her mate will return and if she is still fertile. Events can be followed on the 
Otters, water voles and fish are all benefitting from the improved quality of the UK’s waterways, now described as the cleanest since the industrial revolution. Since almost disappearing from the wild in the 1970s, otters are thriving, particularly in the south west of England, Cumbria and Northumberland. The population of water voles, highly precarious in the 1990s, is also beginning to recover. The good results of stricter pollution controls and extensive conservation work are set to continue in the new year with the introduction of new European water quality directives.











