Abstract：The global climate is getting warmer during the 20th century, which has caused a great concern. This study analyzes the relationship and the changing rhythm of ground temperatures at depths of 0.8, 1.6 and 3.2m and the corresponding air temperature during 1954—2006 in Beijing. From the climate change rates, it is shown that the ground temperature and the air temperature are increased in the 51 years, with the increasing rates of 0.05, 0.18, 0.08℃/10a in the 0.8, 1.6, 3.2m for the ground temperature and 0.25℃/10a for the air temperature, and the increasing range is increased in recent years. The wavelet analysis shows a multiple periodic changing trend of either 10 or 15 years, and the temperature saw mutations in the beginning of the 1970's and the end of the 1980's. Before the 1970's, it is in the climatic warm period; during 1972 and 1989, it is in the climate cold period; in the years from 1990 to 2006, it is again in the climate warm period. And based on the results, it is expected that the next 15 or 16 years will see colder climate. But the general trend in the large scale is on the warmer side. Based on the standard established by World Meteorological Organization, the climate abnormal year is determined. The climate abnormal warm year with respect to the ground temperature is around 1963 and 2000, and the climate abnormal cold year is around 1957 and 1970. The abnormal cold year with respect to the air temperature has not been found, but the abnormal warm year is the year of 2006. The results provide a new angle to study the climate change in Beijing.
2010, Vol. 28 
