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利用自然正交函数(EOF)揭示中国各省份能源消费碳排放量变动的时空特征,借助地理加权回归模型(GWR)分析了碳排放量驱动因素的空间分布状况.研究结果表明:中国省域能源消费碳排放量整体处于增长状态,但其增长速度有减缓趋势;EOF第一模态结果显示,碳排放量以四川省为中心向南北方向扩散,低值区集中分布在西北地区和珠三角地区;第二模态结果显示,碳排放量增长速度表现出西南地区和东南沿海地区较快,而中部省份碳...
基于EOF/SVD的短期气候预测误差订正方法及其应用
短期气候预测 误差订正方法 奇异值分解 经验正交函数分解
2011/7/28
利用中国科学院大气物理研究所第2代短期气候数值预测系统(IAP-DCP II)1980—1999年共20年的集合回报结果,提出了基于经验正交函数(EOF)和奇异值分解(SVD)的模式误差订正方法,并考察了上述订正方法对中国科学院大气物理研究所气候预测系统预测性能提高的季节差异及其稳定性,分析了订正方法对不同预报场的适用范围及其可能原因。
基于EOF分析辽宁省极端气温时空分布的研究
极端气温 时空分布 EOF分析
2009/6/9
采用EOF方法分析辽宁省48年极端气温时空分布规律。第一特征向量空间分布指出全省极端气温变化具有同步性,第二和
第三特征向量分别代表地理纬度和地形因素对极端温度分布的影响。第一时间系数的正负变化则分别反映了全省极端气温随时间
的演变规律,序列均呈波动性上升趋势。
Generation of soil moisture patterns at the catchment scale by EOF interpolation
Empirical Orthogonal Function soil moisture
2009/4/28
Spatial patterns of soil moisture cannot be adequately characterized by direct measurement for most practical applications, so interpolation between observations is required. Interpolation of soil moi...
Runoff generation in a forested catchment (0.18 km2) was simulated using a quasi-three-dimensional rainfall-runoff model. The model was formulated over a finite grid where water movement was assumed t...
EOF Analysis of Central Drake Passage Currents from DRAKE 79
EOF Analysis Central Drake Passage Currents DRAKE 79
2009/1/15
A rotary Empirical Orthogonal Function analysis was performed on the current meter observations made dining DRAKE 79 to quantify current variability in central Drake Passage in the vicinity of the Pol...
Technical note: analytical estimation of the optimal parameters for the EOF retrievals of the IASI Level 2 Product Processing Facility and its application using AIRS and ECMWF data
EOF retrievals IASI Level 2 Product Processing Facility ECMWF
2009/1/4
The Empirical Orthogonal Function (EOF) retrieval technique consists of calculating the eigenvectors of the spectra to later perform a linear regression between these and the atmospheric states, this ...
Observations and EOF Analysis of Low-Frequency Variability in the Western Part of the Gulf Stream Recirculation
Low-Frequency Variability Long Term Upper Ocean Study Gulf Stream Recirculation
2008/12/27
This study of low-frequency oceanic variability is based on data collected during the Long Term Upper Ocean Study (LOTUS), which was a two year program of (mainly) moored meteorological and oceanograp...
利用EOF相空间分析东亚梅雨旱涝长期过程的初步研究
经验正交函数 相空间 梅雨
2008/10/14
利用非线性动力学中的相空间概念,分析了梅雨旱涝3~5年循环的长期过程.对全球热带850hPa的纬向风场距平所作的EOF,第1特征向量显示了Walker环流异常在赤道球圈上的分布;第2特征向量主要显示热带-副热带之间的环流异常的经向分布.在第1时间系数和第2时间系数所定义的2维相空间中,由相轨线分析,得到梅雨涝年主要集中于第2象限,而旱年则相对多在第4象限.说明梅雨旱涝年际变异的主导模态和热带大气环...