Trends of Temperature Extremes in China and its Relationship with Global temperature anomalies Relationship with Global Temperature Anomalies |
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Authors: | HUANG Danqing QIAN Yongfu and ZHU Jian |
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Affiliation: | Institute of Severe Weather & Climate, School of Atmospheric Sciences, Nanjing University, Nanjing 210093,Institute of Severe Weather & Climate, School of Atmospheric Sciences, Nanjing University, Nanjing 210093,Institute of Severe Weather & Climate, School of Atmospheric Sciences, Nanjing University, Nanjing 210093 |
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Abstract: | Changes of temperature extremes over China were evaluated using daily
maximum and minimum temperature data from 591 stations for the period
1961--2002. A set of indices of warm extremes, cold extremes and daily
temperature range (DTR) extremes was studied with a focus on trends. The
results showed that the frequency of warm extremes (F_WE) increased
obviously in most parts of China, and the intensity of warm extremes
(I_WE) increased significantly in northern China. The opposite
distribution was found in the frequency and intensity of cold extremes. The
frequency of high DTR extremes was relatively uniform with that of
intensity: an obvious increasing trend was located over western China and
the east coast, while significant decreases occurred in central,
southeastern and northeastern China; the opposite distribution was found for
low DTR extreme days. Seasonal trends illustrated that both F_WE and
I_WE showed significant increasing trends, especially over northeastern
China and along the Yangtze Valley basin in spring and winter. A correlation
technique was used to link extreme temperature anomalies over China with
global temperature anomalies. Three key regions were identified, as follows:
northeastern China and its coastal areas, the high-latitude regions above
40oN, and southwestern China and the equatorial eastern Pacific. |
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Keywords: | temperature extremes daily threshold trend global temperature anomalies |
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