By Roger Harrabin

Environment analyst, BBC News

Some sources say this year could be the third warmest on record This year will be one of the top five warmest years globally since records began 150 years ago, according to figures compiled by the Met Office. The UK's weather service projects that, unless there is an exceptionally cold spell before the end of the year, temperatures will be up on last year. Climate sceptics had pointed out that the temperature rise appeared to have stalled in the last decade or so. That was caused in part by the Pacific La Nina current, which cools the Earth. But the influence of La Nina declined in the spring and the Met Office project that, barring a very cold December, this year will be the fifth warmest on record. Other sources say it could even be the third warmest. The last ten years have been in the top 15 warmest on record. And this summer the UK enjoyed temperatures higher than the long-term average. Although the Met Office was pilloried after forecasting a "barbecue summer", it was their rainfall forecast, not the projected temperatures, that was wrong. Next year we will see the influence of the warming El Nino current, and the Met Office says there is a 50% chance that global temperatures will hit an all-time high.



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