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| 论文编号: |
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| 论文题目: |
Spatiotemporal change of diurnal temperature range and its relationship with sunshine duration and precipitation in China |
| 英文论文题目: |
Spatiotemporal change of diurnal temperature range and its relationship with sunshine duration and precipitation in China |
| 第一作者: |
神祥金 |
| 英文第一作者: |
Shen, X. J. |
| 联系作者: |
周道玮 |
| 英文联系作者: |
Zhou, D. W. |
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| 发表年度: |
2014 |
| 卷: |
119 |
| 期: |
23 |
| 页码: |
13163-13179 |
| 摘要: |
We examined the spatiotemporal variation in diurnal temperature range (DTR) and discussed the reasons for the changes of DTR in China based on data from 479 weather stations from 1962 to 2011. Results showed that DTR decreased rapidly (0.291 degrees C/decade) from 1962 to 1989 due to slightly decreased T-max and significantly increased T-min, but the decrease in DTR has stopped since 1990 as T-max and T-min kept pace with each other. During 1990-2011, DTR remained trendless, with slight increase in the 1990s and slight decrease after 2000. During the whole study period from 1962 to 2011, DTR decreased at a rate of 0.157 degrees C/decade nationally. Spatially, decreases in DTR were greatest in Northeast China and lowest in Southwest China with a transect running from northeast to southwest showing the decreasing trends change from high to low. Seasonally, DTR decreases were greatest in winter and lowest in summer, and the magnitudes of decrease reduced from the north to south of China. The changes in DTR were closely correlated with changes in sunshine duration (SD) in China except the Tibetan Plateau, suggesting that SD decrease is an important contributor to the decrease of DTR through its influence on T-max. In addition to the contribution of SD decrease, the increasing of precipitation played an important role in DTR decrease in Northwest China, the most arid region of China. It appeared that changes of cloud cover (CC) were not the reasons for DTR changes in the past 50 years as CC has decreased during the study period. |
| 英文摘要: |
We examined the spatiotemporal variation in diurnal temperature range (DTR) and discussed the reasons for the changes of DTR in China based on data from 479 weather stations from 1962 to 2011. Results showed that DTR decreased rapidly (0.291 degrees C/decade) from 1962 to 1989 due to slightly decreased T-max and significantly increased T-min, but the decrease in DTR has stopped since 1990 as T-max and T-min kept pace with each other. During 1990-2011, DTR remained trendless, with slight increase in the 1990s and slight decrease after 2000. During the whole study period from 1962 to 2011, DTR decreased at a rate of 0.157 degrees C/decade nationally. Spatially, decreases in DTR were greatest in Northeast China and lowest in Southwest China with a transect running from northeast to southwest showing the decreasing trends change from high to low. Seasonally, DTR decreases were greatest in winter and lowest in summer, and the magnitudes of decrease reduced from the north to south of China. The changes in DTR were closely correlated with changes in sunshine duration (SD) in China except the Tibetan Plateau, suggesting that SD decrease is an important contributor to the decrease of DTR through its influence on T-max. In addition to the contribution of SD decrease, the increasing of precipitation played an important role in DTR decrease in Northwest China, the most arid region of China. It appeared that changes of cloud cover (CC) were not the reasons for DTR changes in the past 50 years as CC has decreased during the study period. |
| 刊物名称: |
Journal of Geophysical Research-Atmospheres |
| 英文刊物名称: |
Journal of Geophysical Research-Atmospheres |
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| 参与作者: |
Liu, B. H., Li, G. D., Wu, Z. F., Jin, Y. H., Yu, P. J., Zhou, D. W. |
| 英文参与作者: |
Liu, B. H., Li, G. D., Wu, Z. F., Jin, Y. H., Yu, P. J., Zhou, D. W |
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