全球气温纪录连续三年被打破
Last month was the third-warmest June in history, putting 2017 on track to make a hat-trick of the hottest years on record. Experts said it is now 'almost certain' that 2017 will become the third year in a row to break global temperature records. The figures confirm that global warming is now at levels not seen for 115,000 years, leaving experts with little hope of limiting warming to global targets of 2 C. The first half of 2017 was the second warmest on record for Earth, behind only last year, according to new temperature data. The National Oceanic and Atmospheric Administration announced last Wednesday that Earth's average temperature from January to June was 14.4 C, which is 0.9 C warmer than the 20th century average. Record warmth was measured in much of Mexico, western Europe, eastern Russia, eastern Africa and eastern China. Globally, June was the third warmest on record in records going back to 1880, beaten only by the two preceding Junes in 2015 and 2016. The figures align closely with NASA data released recently, which found that the June of this year was the fourth-hottest on record. NASA climate data is calculated in a different way, and found that the June of 1998 was marginally warmer than this year. Based on these results, Gavin Schmidt, director of NASA's Goddard Institute for Space Studies, said that 2017 will 'almost certainly' be among the top three hottest years. 'With update to June, 2017 will almost certainly be a top 3 year in the GISTEMP record (most likely 2nd warmest ~57% chance),' he said on Twitter. Michael Mann, from Pennsylvania State University, has previously published research showing that recent record temperatures have less than a one in a million chance of occurring naturally. 'We have a follow-up article that we've submitted showing that the likelihood of three consecutive record-breaking years such as we saw in 2015-2017 was similarly unlikely,' he told the Guardian. 'In short, we can only explain the onslaught of record warm years by accounting for human-caused warming of the planet.' |