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Abstract
By comparing two sets of quality-controlled daily temperature observation data with and without the
inhomogeneity test and adjustment from 654 stations in China during 1956-2004 and 19562010, impacts
of inhomogeneity on changing trends of four percentile temperature extreme indices, including occurrences
of cold days, cold nights, warm days, and warm nights with varying intensities, were discussed. It is found
that the inhomogeneity affected the long-term trends averaged over extensive regions limitedly. In order
to minimize the inhomogeneity impact, the 83 stations identified with obvious inhomogeneity impacts were
removed, and an updated analysis of changing trends of the four temperature extreme indices with varying
intensities during 1956-2010 was conducted. The results show that annual occurrences of both cold nights
and cold days decreased greatly while those of warm nights and warm days increased significantly during
the recent 20 years. The more extreme the event is, the greater the magnitude of changing trends for the
temperature extreme index is. An obvious increasing trend was observed in annual occurrences of cold days
and cold nights in the recent four years. The magnitude of changing trends of warm extreme indices was
greater than that of cold extreme indices, and it was greater in northern China than in southern China.
Trends for summer occurrence of cold days were not significant. Decreasing trends of occurrences of both cold
nights and cold days were the greatest in December, January, and February (DJF) but the least in June, July,
and August (JJA), while increasing trends of warm nights were the greatest in JJA. Cold nights signiˉcantly
decreased from 1956 to 1990, and then the decreasing trend considerably weakened. The decreasing trend
also showed an obvious slowdown in recent years for occurrence of cold days. However, increasing trends
of warm nights and warm days both have been accelerated continuously since the recent decades. Further
analysis presents that the evolution of the trends for occurrences of the four temperature extreme indices
was dominated by the changes in northern China.
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Citation
WANG Zunya, DING Yihui, ZHANG Qiang, SONG Yafang. 2012: Changing Trends of Daily Temperature Extremes with Different Intensities in China. Journal of Meteorological Research, 26(4): 399-409.
WANG Zunya, DING Yihui, ZHANG Qiang, SONG Yafang. 2012: Changing Trends of Daily Temperature Extremes with Different Intensities in China. Journal of Meteorological Research, 26(4): 399-409.
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WANG Zunya, DING Yihui, ZHANG Qiang, SONG Yafang. 2012: Changing Trends of Daily Temperature Extremes with Different Intensities in China. Journal of Meteorological Research, 26(4): 399-409.
WANG Zunya, DING Yihui, ZHANG Qiang, SONG Yafang. 2012: Changing Trends of Daily Temperature Extremes with Different Intensities in China. Journal of Meteorological Research, 26(4): 399-409.
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