Taking the planet’s temperature: How are global temperatures calculated?

Grantham intern Peter Davies (Department of Physics) delves into global temperature records. Statements such as “2014 earth’s warmest year on record” or “No global warming for 18 years 1 month” are conclusions from different atmospheric temperature data sets.  Before assessing which is true it is important to understand how temperatures are measured, how data sets are created and used to calculate global temperatures, and the … Continue reading Taking the planet’s temperature: How are global temperatures calculated?

With climate models, simpler isn’t necessarily better

Grantham Institute Co-Director Professor Joanna Haigh discusses a recent paper which argues that  existing climate models ‘run hot’ and overstate the extent of manmade climate change. It is perplexing that some climate change sceptics, who expend much energy in decrying global circulation (computer) models of the climate, on the basis that they cannot properly represent the entire complexities of the climate system and/or that they contain too many approximations, … Continue reading With climate models, simpler isn’t necessarily better

The costs of decarbonising the UK

By Dr Flora Whitmarsh, Grantham Institute The costs associated with reducing emissions in the UK have been discussed recently in the press. In an article in the Mail on Sunday, David Rose made the claim that energy policies shaped by the so-called “Green Blob” –  a term coined by Owen Paterson for what he called “the mutually supportive network of environmental pressure groups, renewable energy companies and … Continue reading The costs of decarbonising the UK

Ocean heat uptake – checking the facts

By Dr Flora Whitmarsh, Grantham Institute The recent slowdown in global temperature rise has led to suggestions that global warming has stopped. In fact, the Earth system is still gaining heat, and the slowdown was likely caused by a series of small volcanic eruptions, a downward trend in the solar cycle, and increased heat uptake of the ocean. Writing in the Telegraph, Christopher Booker claims … Continue reading Ocean heat uptake – checking the facts

Ocean warming in the media

A recent paper on ocean warming has been reported on in a number of newspaper articles, most recently by Christopher Booker in the Sunday Telegraph. The author of the paper, Professor Carl Wunsch of MIT, wrote a letter to the editor of the Sunday Telegraph in response to Christopher Booker’s article. As the letter has yet to be published in the Sunday Telegraph, with the permission … Continue reading Ocean warming in the media

Fact checking a recent Telegraph article by Christopher Booker

by Dr Flora Whitmarsh, Grantham Institute In an article for the Telegraph, Christopher Booker gave his views on Professor Sir Brian Hoskins’ appearance on the Today programme earlier this year. In the article, Booker made several claims about climate science relating to rainfall, atmospheric humidity, polar sea ice extent, global temperatures and sea level rise. In this blog I will assess his claims against the findings of … Continue reading Fact checking a recent Telegraph article by Christopher Booker