Trends on the Daily Mean Air Temperature and Its Anomalous Strength in China for the Warm Season in the Last 40 Years
Received date: 2003-03-01
Revised date: 2003-04-26
Online published: 2003-12-25
Supported by
The Ministry of Education of China, No.20010001052; National Key Project for Basic Sciences, No.G1999043405
Trends on the daily mean air temperature and its anomalous strength in China for the warm season (May-September) in the last 40 years (1961-2000) were analyzed using observational 453-station datasets including daily temperature and daily precipitation. Calculation methods are standard deviation and Skewness. Results show that there were different spatial-temporal characteristics in the daily air temperature variability. In the last 40 years, a warming trend was commonly noted in China but the stronger warming was located in the area north of the Yellow River. For the time evolution, a transition time point was found in the late 1970s from a cooling trend to a warming trend but the stronger warming appeared since the late 1990s. The amplifying daily temperature anomaly indicated a trend of climate variability in many places of China. The relationships between daily air temperature and rainfall events were also discussed particularly in the coastal regions.
Key words： daily temperature; climate variability; trend; China
LIN Xiang, QIAN Weihong . Trends on the Daily Mean Air Temperature and Its Anomalous Strength in China for the Warm Season in the Last 40 Years[J]. Acta Geographica Sinica, 2003 , 58(7s) : 21 -30 . DOI: 10.11821/xb20037s003
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