Analysis on Variation of Sunshine Duration in Xi′an in Recent 60 Years and Its Influencing Factor

WANG Zhao;PENG Yan;BAI Ai-Juan;DONG Yan;LI Xing-Min

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Plateau Meteorology
Plateau Meteorology ›› 2012, Vol. 31 ›› Issue (1) : 185-192.
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Analysis on Variation of Sunshine Duration in Xi′an in Recent 60 Years and Its Influencing Factor

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Abstract

Using the long term record (about 60 years) of meteorological parameters of Xi′an and east of Guanzhong region in Shaanxi Province and nine years of MODIS data, the causes of decreasing trend for sunshine duration during rapid economic developing period have been analyzed. The result shows that there is an obviously decrease of sunshine duration in Xi′an from 1981 to 2001. The decreasing trends are also found in Weinan and Huaxian, east of Xi′an. And there is the good correlation of percentage reduction of sunshine duration at two different stations. But the decrease of sunshine duration is not found in Hua mountain. The cause of the reduction is at height below 2 km. And there is a high value center of AOD on the east side of Guanzhong region in Shaanxi Province, while after eliminating  of fog day, total cloud cover and low cloud cover, there are no obvious increase of fog day and cloud cover based on the increase of aerosol caused by the development of the cities. So the main cause of sunshine duration over east of Guanzhong in Shaanxi Province is not the indirect effect of aerosol, but most probably direct radiation. That means in the special terrain and prevailing wind, anthropogenic aerosol caused by the development of cities in Guanzhong region of Shaanxi Province accumulated in east part of Guanzhong, thus there is a high aerosol concentration layer below 2 km above the surface layer. The existence of high concentration aerosol layer could reduce the amount of solar radiation reaching the earth surface and decrease the sunshine duration. The increasing sunshine duration from 2002 to 2008 probably has some relation with anti-pollution measures and variation of prevailing wind, which need further study.

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Xi′an / Sunshine duration / Aerosol / Direct effect / Indirect effect

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WANG Zhao , PENG Yan , BAI Ai-Juan , DONG Yan , LI Xing-Min. Analysis on Variation of Sunshine Duration in Xi′an in Recent 60 Years and Its Influencing Factor. Plateau Meteorology. 2012, 31(1): 185-192

References

[1]郭军, 任国玉.天津地区近40年日照时数变化特征及其影响因素[J].气象科技, 2006, 34（4）: 415-420.
[2]陈碧辉, 张平, 郝克俊, 等.近50年成都市日照时数变化规律[J].气象科技, 2008, 36（6）: 760-763.
[3]周长艳, 杨秀海, 李跃清, 等. \!日光城\"拉萨日照时数的变化特征[J].资源科学, 2008, 30(7): 1000-1004.
[4]杜军, 边多, 胡军, 等.西藏35年日照时数的变化特征及其影响因素[J].地理学报, 2007, 62(5): 2-4.
[5]买苗, 曾燕, 邱新法, 等.黄河流域近40年日照百分率的气候变化特征[J].气象, 2006, 32(5): 62-66.
[6]李跃清.近40年青藏高原东侧地区云、 日照、 温度及日较差的分析[J].高原气象, 2002, 21(3): 327-331.
[7]王枫叶, 刘普幸. 酒泉绿洲近４５年日照时数的变化特征分析[J].高原气象, 2010, 29(4): 999-1004.
[8]龙红,谢国清, 李蒙, 等.近46年来昆明市日照变化特征分析[J].云南地理环境研究, 2009, 21（4）: 101-105 .
[9]Stanhill G, Cohen S. Global dimming: A review of the evidence for a widespread and significant reduction in global radiation with discussion of its probable causes and possible agricultural consequence[J].Agricul Forest Meteor, 2001, 107(4): 255-278.
[10]Shaw C L, Chung H W, Chein J S, et al. Reduction in sunshine duration over Taiwan: Causes and implications[J].Atmos Ocean Sci, 2002, 13(4): 523-545.
[11]郑小波, 罗宇翔, 段长春, 等. 云贵高原近45年来日照及能见度变化及其成因初步分析[J].高原气象, 2010, 29(4): 992-998.
[12]Qiu Jinhuan, Yang Liquan. Variation characteristics of atmospheric aerosol optical depths and visibility in North China during 1980-1994[J]. Atmos Environ,2000, 34 (4): 603-609.
[13]罗云峰,吕达仁,李维亮,等.近30年来中国地区大气气溶胶光学厚度的变化特征[J]. 科学通报, 2000, 45(5): 549-554.
[14]罗云峰,李维亮, 周秀骥,等.20世纪80年代中国地区大气气溶胶光学厚度的平均状况分析[J]. 气象学报, 2001, 59(1): 77-87.
[15]宗雪梅, 邱金桓, 王普才.近10年中国16个台站大气气溶胶光学厚度的变化特征分析[J]. 气候与环境研究, 2005, 10(2): 201-205.
[16]王钊, 彭艳, 张树誉. MODIS资料反演AOD及其在区域污染中的应用[J]. 高原气象, 2008, 27(4）: 911-917.
[17]范引琪, 李春强.1980-2003年京、 津、 冀地区大气能见度变化趋势研究[J].高原气象, 2008, 27（6）: 1392-1400.
[18]李晓静, 张鹏, 张兴赢, 等.中国区域MODIS陆上气溶胶光学厚度产品检验[J]. 应用气象学报, 2009, 20（2）: 147-156.
[19]Zhou Chunyan, Liu Qinhuo, Tang Yong, et al. Comparison between MODIS aerosol product C004 and C005 and evaluation of their applicability in the north of China[J].J Remote Sens,2009, 13（5）: 854-872.
[20]赵秀娟, 陈长和, 张武, 等.利用MODIS资料反演兰州地区气溶胶光学厚度[J].高原气象, 2005, 24（1）: 97-103.
[21]Levy R C,Remer L A,Kaufman Y J. Effects of neglecting polarization on the MODIS aerosol retrieval over land[J].IEEE Trans Geosci Remote Sens,2004, 42(11): 2576-2583.
[22]Levy R C, Remer L A, Mattoo S, et al. Second-generation operational algorithm: Retrieval of aerosol properties over land from inversion of moderate resolution imaging spectroradiometer spectral reflectance[J].J Geophys Res,2007, 112, D13211, doi: 10.1029/2006JD007811.
[23]赵庆云, 张武, 王式功.空气污染与大气能见度及环流特征的研究[J].高原气象, 2003, 22(4): 393-395.
[24]赵秀娟, 陈长和, 袁铁, 等.兰州冬季大气气溶胶光学厚度及其与能见度的关系[J].高原气象, 2005, 24（4）: 617-622.
[25]鲁渊平, 杜继稳, 侯建忠, 等.陕西省风速风向时空变化特征[J].陕西气象, 2006, 26（1）: 1-3.
[26]任国玉, 郭军, 徐铭志, 等.近50年中国地面气候变化基本特征[J].气象学报, 2005, 63(6): 942-956.
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