| 1961～2009年我国地面太阳辐射变化特征及云对其影响的研究 |
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| 引用本文： | 杨溯,石广玉,王标,杨红龙,段云霞.1961～2009年我国地面太阳辐射变化特征及云对其影响的研究[J].大气科学,2013,37(5):963-970. |
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| 作者姓名： | 杨溯 石广玉 王标 杨红龙 段云霞 |
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| 作者单位： | 1.国家气象信息中心, 北京100081 |
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| 基金项目： | 国家重点基础研究发展计划项目(973计划)2010CB950502;中国科学院战略性先导科技专项XDA05100504 |
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| 摘 要： | 基于我国100个地面站点的地面太阳总辐射、日平均云量资料分析1961～2009年我国地面太阳辐射(Surface Solar Radiation,SSR)变化特征及云在不同时期对SSR的影响。结果显示:1961～2009年我国SSR经历了先下降后上升的变化过程,其中1961～1990年SSR显著下降("变暗"),下降速率为-4.3%/10 a(7.87 W m–2(10 a)–1),各地SSR变化趋势比较一致;1990年后SSR开始上升("变亮"),上升速率为2.8%/10 a(2.4 W m–2(10 a)–1),各地SSR变化趋势不如前一阶段一致,但没有显著的地域分布特征。晴空条件的设置对1961～1990年各站点SSR变化特征影响不大,仍为大范围下降("变暗"),但对1990～2009年的结果影响显著。相比全天空条件的结果,晴空条件下1990～2009年我国SSR变化有明显的南北特征,南方地区以"变亮"为主,而北方地区大多继续"变暗",但"变暗"速度减缓。1961～1990年我国总云量总体呈小幅下降趋势,下降速率很慢,这一时期总云量与全天空SSR没有很好的对应关系;1990～2009年我国总云量总体呈小幅上升趋势,有显著的南北分布差异,北方地区以上升趋势为主,南方地区以下降趋势为主,期间云量与全天空情况下SSR有很好的对应关系。这些结果表明,在"变暗"阶段,云对SSR的作用不显著,而在"变亮"阶段,云的作用变得较为突出。
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| 关 键 词： | 地面太阳辐射 云 全球变暗 全球变亮 |
| 收稿时间： | 3/5/2012 12:00:00 AM |
| 修稿时间： | 2013/2/19 0:00:00 |
Trends in Surface Solar Radiation (SSR) and the Effect of Clouds on SSR during 1961-2009 in China |
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| YANG Su,SHI Guangyu,WANG Biao,YANG Honglong and DUAN Yunxia.Trends in Surface Solar Radiation (SSR) and the Effect of Clouds on SSR during 1961-2009 in China[J].Chinese Journal of Atmospheric Sciences,2013,37(5):963-970. |
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| Authors: | YANG Su SHI Guangyu WANG Biao YANG Honglong and DUAN Yunxia |
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| Institution: | 1.National Meteorological Information Centre, Beijing 1000812.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 1000293.Shenzhen National Climate Observatory, Shenzhen Meteorological Bureau, Shenzhen 5180404.Shenyang Meteorological Service, Shenyang 110016 |
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| Abstract: | This study investigates variations in surface solar radiation (SSR) and the effects of cloud on SSR during 1961-2009 based on global radiation and cloud fraction data from 100 radiation observation sites over China. The results indicate a general decrease of -4.3%/10a (7. 87 W m-2 (10 a)-1) in SSR over land surfaces since measurements began (in about 1961) until 1990, with a turnover corresponding to a 2.8%/10a (2.4 W m-2 (10a)-1) increase from 1990 onward. Moreover, this turnover was more significant in southern China. It seems that cloud was not one of the primary factors inducing global dimming during 1961-1990, based on the similar variation characteristics witnessed under all-sky and clear-sky conditions and the weak correlation between total cloud fraction and SSR. However, there were distinct differences between all-sky and clear-sky SSR results after 1990 and it shows a significant negative correlation between all-sky and clear-sky SSR values. Thus, it may be concluded that cloud had a significant effect on SSR variation, such that it may have inhibited global brightening in some way during 1990-2009. |
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| Keywords: | Surface solar radiation Cloud Global dimming Global brightening |
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