关键词: 青藏铁路沿线, 历史气候, 世纪变化

Abstract: Using the latest 600 years historic climate proxy data along the Qinhai-Xizang railway（GRM～LASA stage）, we have made the decadal sequence of each data, and have also analyzed it with the climatic diagnosis method of correlation, power spectrum, harmonic analysis, trend etc. The results show that the annual mean surface temperature was colder from the middle and end of the 17th century to the beginning of the 18th century, while it was warmer at the end of the 20th century. Warming began from the middle of the 18th century and maintained till the end of the 20th century. The annual mean surface temperature and air temperature were comparative warmer in the 16th, the 19th and the 20th century, while comparative colder in the 15th, the 17th and the 18th century; the extend of temperature warming up in the 20th century exceeded that in the 19th century. The natural wave period of temperature included 4 or 5 entries.

Key words: Qinhai-Xizang railway, climate history, century change