| Global warming fingerprint | |
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Heat waves and periods of unusually warm weather |
Mongolia
A 1,738-year tree-ring record from remote alpine forests in the Tarvagatay Mountains indicates that 20th century temperatures in this region are the warmest of the last millennium. Tree growth during 1980-1999 was the highest of any 20-year period on record, and 8 of the 10 highest growth years occurred since 1950. The 20th century warming has been observed in tree-ring reconstructions of temperature from widespread regions of Eurasia, including sites in the Polar Urals, Yakutia, and the Taymir Peninsula, Russia. The average annual temperature in Mongolia has increased by about 1.3°F (0.7°C) over the past 50 years.
Reference: IPCC, 2001b. Climate Change 2001: Impacts, Adaptation, and Vulnerability. Intergovernmental Panel on Climate Change (IPCC) Working Group II, MacCarthy, J.J. et al., eds. Cambridge University Press, Cambridge, UK.
D'Arrigo, R. et al., 2001. 1,738 years of Mongolian temperature variability inferred from a tree-ring width chronology of Siberian Pine. Geophysical Research Letters, 28, 3: 543.
