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| 基于经验模态分解的西安市空气质量预报订正方法 | |
| 引用本文： | 毛明策,王繁强,王琦.基于经验模态分解的西安市空气质量预报订正方法[J].气象科技,2010,38(6):679-683. |
| 作者姓名： | 毛明策 王繁强 王琦 |
| 作者单位： | 1. 陕西省气象局气候中心;陕西省气象科学研究所,西安,710014 2. 陕西省气象科学研究所,西安,710014 3. 陕西省气象局气候中心 |
| 基金项目： | 陕西省气象局研究型业务基金科研项目(2010M18)资助 |
| 摘 要： | 为提高城市空气质量预报的准确率,研制了针对数值预报模式CAPPS2的订正方法,对2001—2007年西安市逐日PM10、SO_2、NO_2浓度均值和相应的降水、风速作经验模态分解(EMD)分析,用最大熵谱方法检验各本征模态函数(IMF)周期,计算其方差贡献率,制定订正方法并进行数值试验。结果表明:PM10浓度波动以周尺度为主,有明显周末效应,与主要清除过程匹配较好;SO_2、NO_2浓度波动与主要清除过程不同步;基于周末效应的订正规则对PM10、SO_2订正效果较理想,对NO_2订正效果不确定。 |
| 关 键 词： | 空气质量预报 经验模态分解 订正 |
| 收稿时间： | 2010/3/23 0:00:00 |
| 修稿时间： | 2010/10/15 0:00:00 |
Correcting Rules for Xian Urban Air Quality Forecasts with Empirical Mode Decomposition |
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| Mao Mingce,Wang Fanqiang and Wang Qi.Correcting Rules for Xian Urban Air Quality Forecasts with Empirical Mode Decomposition[J].Meteorological Science and Technology,2010,38(6):679-683. | |
| Authors: | Mao Mingce Wang Fanqiang and Wang Qi |
| Institution: | Mao Mingce~1 Wang Fanqiang~2 Wang Qi~1 (1 Shaanxi Climate Center,2 Shaanxi Institute of Meteorological Sciences,Xi'an 710014) |
| Abstract: | The daily average concentrations of PM10,SO_2,NO_2 and meteorological factors(precipitation and wind) of the corresponding time from 2001 to 2007 in Xi'an,Shaanxi Province,are analyzed with Empirical Mode Decomposition(EMD).The periods are tested and the variance contribution rates are calculated of each intrinsic mode function(IMF) by the maximum entropy spectral analysis as well,for improving the accuracy rate of the urban air quality forecast system(CAPPS2) and instituting the correcting rules for the nu... |
| Keywords: | air quality forecast correction empirical mode decomposition |
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