"It warms the global mean temperature with a delay of about six months," says Knight.

“它使全球平均气温的上升推迟了约六个月。”奈特说。

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In 2010, the global average temperature was 0.95 degrees Fahrenheit above the 1961 to 1990 mean that is used as a yardstick for climate measurements, according to the WMO.

2010年，全球平均温度高于1961年到1990年0.95华氏温度，而这个华氏温度一直是气候衡量标准。

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The global maps above show temperature anomalies; that is, how temperatures in June through August 2010 (top image) and 2009 (bottom) differed from the mean temperatures from 1951-1980.

上面的全球地图显示气温异常；也就是说，2010年6月到8月(上面的图片)和2009年(下图)与1951年至1980年间的平均气温相比是如何不同。

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Global mean temperature varied within a range of one degree Celsius during the Holocene.

WSJ: In Study, Past Decade Ranks Among Hottest

As it currently stands, the UN Framework Convention on Climate Change has set a target of limiting the rise in global mean temperature to 2C (3.6F) above pre-industrial levels.

BBC: Climate change evident across Europe, says report

Writing in the Journal Nature in April, researchers said pledges made at December's UN summit in Copenhagen are unlikely to keep the rise in the global mean temperature to 2C (3.6F) above pre-industrial levels.

BBC: EU 'half way to 2020 emissions target'