A comparative analysis of temperature change in Arctic and China since 400 a BP
近400年来北极地区和中国气温变化的对比研究

In order to find relations of climate change between Arctic and China and to understand the global change better, we compared air temperature change of Arctic and China since 400aBP. By conducting trend analysis and spectral analysis, we gained some conclusions. Both Arctic and China have two colder periods (17th century and 19th century) and two warmer periods (18th century and 20th century), but the changing tendency is not identical completely. In the 17th and 19th century temperature in most part of China (except East China, Xinjiang, Tibet) increased earlier than that of Arctic. In the 18th century the highest temperature appeared earlier about 10 years in Arctic than in China. In the 19th century temperature of most stations in Arctic increased more violently than that of China. In the 20th century the warmer period of the two places is similar. The periods of temperature change of the two places are identical, being mainly 130~140, 100, and 80 years. Therefore, the natural factor, specially solar activity is the main reason affecting climate change.