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| 全球环流系统关联性的时空演化特征研究 | |
| 引用本文： | 季飞,支蓉,龚志强,封国林.全球环流系统关联性的时空演化特征研究[J].气象学报,2011,69(6):1038-1045. |
| 作者姓名： | 季飞 支蓉 龚志强 封国林 |
| 作者单位： | 1. 兰州大学大气科学学院,兰州,730000 2. 国家气候中心,中国气象局气候预测室,北京,100081;北京师范大学全球变化与全球科学系统研究院,北京,100875 3. 国家气候中心,中国气象局气候预测室,北京,100081 |
| 基金项目： | 国家自然科学基金，国家科技支撑计划 |
| 摘 要： | 利用NCEP/NCAR全球高度场和地面气压资料,运用矩阵理论,研究了全球高度场和地面气压序列关联性的时空演变特征.结果表明,各层次高度场的关联性在中低纬度区域较好,并向中高纬度地区逐步递减,呈准带状分布；垂直方向上,低层的关联性较弱,随着高度升高关联性逐渐增强；北太平洋区域从低层至高层大气中均存在一个较强的负关联中心,... |
| 关 键 词： | 关联矩阵 时空演变 延迟关联 跃变 |
| 收稿时间： | 2009/10/12 0:00:00 |
| 修稿时间： | 3/1/2010 12:00:00 AM |
Analysis of temporal and spatial characteristics of correlations between the global circulation systems |
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| JI Fei , ZHI Rong , GONG Zhiqiang , FENG Guolin.Analysis of temporal and spatial characteristics of correlations between the global circulation systems[J].Acta Meteorologica Sinica,2011,69(6):1038-1045. | |
| Authors: | JI Fei ZHI Rong GONG Zhiqiang FENG Guolin |
| Institution: | College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China,Laboratory for Climate Prediction, National Climate Center, China Meteorological Administration, Beijing 100081, China; College of Global Change and Earth System Beijing Normal University, Beijing 100875, China,Laboratory for Climate Prediction, National Climate Center, China Meteorological Administration, Beijing 100081, China and Laboratory for Climate Prediction, National Climate Center, China Meteorological Administration, Beijing 100081, China; College of Global Change and Earth System Beijing Normal University, Beijing 100875, China |
| Abstract: | The correlation matrixes are constructed based on the NCEP/NCAR global height field data and the surface pressure data and the characteristics of these two matrixes are analyzed. The results show that the correlations in all levels of height field are better in the middle low latitudes regions and descend to the middle high latitudes regions, presenting the characteristics of quasi zonal distribution; in the vertical direction, the correlations in the low levels are weaker and become more and more stronger with the increase in height; and there is always a negative correlation center in all levels of height field in the north Pacific region, reflecting a certain degree of particularity. The results of the delayed correlation show that the correlation is decreased with the increasing in the delayed days, the change of correlation gradually flats when the delayed time is 15 days and there is an obvious turning point at the time of 60 days. The fact that the correlation decreased with the increasing in delayed days and existence of the decay critical point provide a theory reference for the numerical prediction of 2 weeks or longer time scale. The decay rate of correlation in the circulation system reflects the feature that the higher the latitude is and/or the lower the level is the stronger the correlation is. Changes over time in the global average correlations for the three height fields and the surface pressure field are almost the same with abrupt changes occurred during 1978-1982 and 1996-1998. |
| Keywords: | Correlation matrixes Spatial temporal evolution Delayed correlation Abrupt change |
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