Abstract
Ecological systems in the headwaters of the Yellow River, characterized by hash natural environmental conditions, are very vulnerable to climatic change. In the most recent decades, this area greatly attracted the public’s attention for its more and more deteriorating environmental conditions. Based on tree-ring samples from the Xiqing Mountain and A’nyêmagên Mountains at the headwaters of the Yellow River in the Northeastern Tibetan Plateau, we reconstructed the minimum temperatures in the winter half year over the last 425 years and the maximum temperatures in the summer half year over the past 700 years in this region. The variation of minimum temperature in the winter half year during the time span of 1578–1940 was a relatively stable trend, which was followed by an abrupt warming trend since 1941. However, there is no significant warming trend for the maximum temperature in the summer half year over the 20th century. The asymmetric variation patterns between the minimum and maximum temperatures were observed in this study over the past 425 years. During the past 425 years, there are similar variation patterns between the minimum and maximum temperatures; however, the minimum temperatures vary about 25 years earlier compared to the maximum temperatures. If such a trend of variation patterns between the minimum and maximum temperatures over the past 425 years continues in the future 30 years, the maximum temperature in this region will increase significantly.
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Supported jointly by the National Science Foundation of China (Grant Nos. 40671191 and 90502008), the Innovation Team Project (Grant No. 40421101), the Program for New Century Excellent Talents in University (Grant No. NCET-05-0888), the Chinese 111 Project (Grant No. B06026), and J. Gordon was supported by US National Science Foundation (Grant No. ATM-0402474)
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Gou, X., Chen, F., Yang, M. et al. Asymmetric variability between maximum and minimum temperatures in Northeastern Tibetan Plateau: Evidence from tree rings. Sci. China Ser. D-Earth Sci. 51, 41–55 (2008). https://doi.org/10.1007/s11430-007-0154-1
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DOI: https://doi.org/10.1007/s11430-007-0154-1