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《Journal of Anhui Agricultural Sciences》 2008-36
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Analysis of Daily Temperature Range Abnormities in Jianghuai Area in Meiyu Period and Its Circulation Background

LI Ru-qi et al (Xinjiang Meteorological Observatory,Urumqi,Xinjiang 830002)  
On the basis of the daily maximum and minimum temperature data from 109 stations of Jianghuai Area from 1951 to 2001,the climate characteristics and the circulation background of the daily temperature range change trend in Jianghuai Area were analyzed.The results showed that the daily temperature range in Jianghuai Area in Meiyu period could be divided into southern,northern and western climatic areas.The daily temperature range in each region showed obvious or unconspicuous decreasing trends.The decreasing trend in northern area was most obvious.The daily temperature range anomalies in Jianghuai Area had better corresponding relationship with the rainfall in Jianghuai Area in Meiyu period,especially in Jianghuai southern area.Taking the daily temperature range in Jianghuai southern area in Meiyu period for an example,the correlation between the daily range anomalies and the circulation background was analyzed.It was found that monsoon circulation and South Asia high strengthened(weakened),the subtropical high bated(reinforced),warm(cool) advection in low level intensified,air column thickness increased(reduced),which decreased(increased) the rainfall in Jianghuai south area and increased(decreased) the temperature daily range.
【Fund】: 国家自然科学基金资助项目(40233037;40175021)
【CateGory Index】: P423.31
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