| 近44年四川太阳辐射时空变化特征 |
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| 引用本文： | 陈中钰,吕结.近44年四川太阳辐射时空变化特征[J].高原山地气象研究,2018,38(3):56-60. |
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| 作者姓名： | 陈中钰 吕结 |
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| 作者单位： | 1. 四川省气象探测数据中心, 成都 610072; |
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| 摘 要： | 利用四川144个气象站1971~2014年的逐月日照时数数据和四川6个辐射站的逐月太阳总辐射数据,以气候学模拟的方法,计算了四川144个气象站的逐月太阳总辐射值。基于44年四川太阳辐射的平均分布和EOF分析的第一模态,将四川分成3个区域,并研究了四川太阳辐射的时空变化。结果表明:(1)四川年太阳总辐射从东南往西北随海拔升高呈阶梯式增加,结合年太阳总辐射EOF第一模态可把四川分为3个区域,分别是川西高原、攀西地区和四川盆地;(2)川西高原年总辐射随时间呈先下降后趋于平稳的变化,攀西地区年总辐射随时间的变化是先下降后上升,四川盆地总辐射变化不大,有缓慢下降趋势;(3)20世纪70年代四川大部分地区太阳总辐射是正距平,80年代除川西高原和雅安地区外基本是负距平,90年代是负距平,2001~2014年除攀西地区外基本是负距平。
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| 关 键 词： | 太阳辐射 时间变化 空间变化 |
| 收稿时间： | 2018-08-10 |
Spatial-Temporal Variations of Solar Radiation in Sichuan Province in Recent 44 Years |
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| Affiliation: | 1. Sichuan Provincial Meteorological Observation and Data Centre, Chengdu 610072, China;2. Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China |
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| Abstract: | Based on duration of sunshine month by month at 144 stations and observation data of global radiation month by month at 6 stations of Sichuan Province from 1971 to 2014, global radiation at 144 stations in Sichuan Province were calculated month by month by using climatic simulate method. Based on average distribution of global radiation and the first mode of EOF analysis in Sichuan Province in recent 44 years, 3 climate subareas could be divided in Sichuan Province, and spatial-temporal variations of global radiation in Sichuan Province were studied. The results are as follows: (1) the global radiation in Sichuan Province increased from southeast to northwest with increasement of altitude, and 3 climate subareas which were West-Sichuan Plateau, Panzhihua-Xichang area, Sichuan Basin could be divided in Sichuan Province Based on the first mode of EOF analysis of global radiation. (2) global radiation in West-Sichuan Plateau descended first and then unchanged with time, global radiation in Panzhihua-Xichang area descended first and then rose with time, global radiation in Sichuan Basin had little change and declined slowly. (3) the global radiation in most areas of Sichuan Province were positive departure in 1970 s, the global radiation which were in areas except West-Sichuan Plateau and Ya'an area were negative departure in 1980 s, the global radiation were negative departure in 1990 s, the global radiation which were in area except Panzhihua-Xichang area were negative departure from 2001 to 2014. |
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