XING Cheng,BAI Xue-mei.The Climate Changes of Sunshine Duration over Tibet[J].Journal of Chengdu University of Information Technology,2017,(05):554-558.[doi:10.16836/j.cnki.jcuit.2017.05.015]
西藏地区日照气候变化特征
- Title:
- The Climate Changes of Sunshine Duration over Tibet
- 文章编号:
- 2096-1618(2017)05-0554-05
- Keywords:
- atmospheric science; climatology; tibet; sunshine duration; precipitation
- 分类号:
- P467
- 文献标志码:
- A
- 摘要:
- 采用统计方法,对西藏地区24个测站1973-2012年逐月的日照时数进行分析,并研究了降水与日照时数的关系,试图揭示日照时数气候变化及与降水的关系。结果表明:西藏地区的日照时数空间分布呈现自东南向西北增加的特点,时间分布则是逐年递减的趋势,从20世纪90年代末到21世纪初是明显的低值时期。四季变化上,冬季的日照时数是逐年缓慢增加的,其他三季逐年减少,夏季减少的趋势最显著。其中,夏季是日照时数最短的季节。西藏地区的日照时数年代际变化显著,空间分布上的差异明显。日照时数与降水呈负相关关系。
- Abstract:
- Statistical analysis method was used to analyze the monthly sunshine duration series in 24 meteorological stations in Tibet from 1973 to 2012, and the relationship between precipitation and sunshine hours was also studied. The results of our research may lead to the following conclusions: The spatial distribution of Tibet sunshine duration increased from southeast to northwest. Annual sunshine duration average reduction is 13.5 h per decade, especially in the 1990 s, being a significant low period. The sunshine duration in winter is in increasing trend, and the other three seasons are in decreasing trend. The most obvious decreasing trend is in summer. The sunshine duration in summer is the shortest among four seasons. Sunshine duration has a significant decade change, and it is also a significant regional distribution difference. Sunshine duration is negatively correlated with precipitation.
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备注/Memo
收稿日期:2017-01-06 基金项目:黑龙江省气象局科技资助项目(HQZC2017003)