The latest warm period has caused the number of glaciers to decrease from 150 in 1850 to 26 today.
最近的暖期已导致冰川数量从1850年的150个下降到今天的26个。
So scientists often look to this so-called Pliocene warm period for hints about our future climate.
因此科学家们经常在所谓上新世暖温期中寻找有关未来气候的线索。
And he agreed that the debate had not been settled over whether the Medieval warm period was warmer than the current period.
他也承认有关中世纪暖期是否比当前阶段更暖的争论还没有定论。
Dr Swetnam's work suggests that variations in temperature were well correlated with the frequency of fire during what climatologists call the medieval warm period, from 900 to 1300.
Swetnam博士的工作表明，在气象学家所说的中世纪暖期，即公元900年到1300年，气温的变动和火灾的频率密切相关。
The whole tropical tropopause has been warmed up from cold period to warm period.
从偏冷期到偏暖期，整个热带对流层顶显著变暖。
Part One describes the Medieval Warm Period, roughly 900 to 1200.
第一部分描述了大约在公元900年到公元1200年的中世纪温暖期。
Global temperatures began to rise slowly after 1850, with the beginning of the Modern Warm Period.
1850年后，随着现代暖期的开始，全球气温开始缓慢上升。
"What's not so well known about the Medieval warm Period is how warm it was in the western U.S.," Swetnam said.
“现在对中世纪温暖期还不甚明了的是彼时美国西部地区的温暖程度，”史威特南说。
During the Medieval Warm Period extensive fires burned through parts of the Giant Forest at intervals of about 3 to 10 years, he said.
他说，在中世纪温暖期时代，大范围的火灾每隔3至10年就会席卷巨木林的部分区域。
Because the midpoint of the Medieval Warm Period was about 850, an extension of Bond's cycles would place the midpoint of the next warm interval in the twenty-fourth century.
由于中世纪温暖期的中点约为850年，因此邦德循环的延长将使下一个温暖间隔的中点出现在二十四世纪。
Because the midpoint of the Medieval Warm Period was about 850, an extension of Bond's cycles would place the midpoint of the next warm interval in the twenty-fourth century.
由于中世纪温暖期的中点约为850年，因此邦德循环的延长将使下一个温暖间隔的中点出现在二十四世纪。
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