经验模态分解下中国气温变化趋势的区域特征
收稿日期: 2007-01-10
修回日期: 2007-09-20
网络出版日期: 2007-11-25
基金资助
国家自然科学基金项目(40371044)
The Regional Features of Temper ature Variation Trends over China by Empirical Mode Decomposition Method
Received date: 2007-01-10
Revised date: 2007-09-20
Online published: 2007-11-25
Supported by
National Natural Science Foundation of China, No.40371044
用经验模态分解(EMD) 方法对中国700 多个站(1951-2001 年) 月平均气温进行了分析, 提取气温变化趋势项, 作空间分型, 并计算各站气温变化率, 以地理信息系统为数据处理平台, 以1km×1km 分辨率的DEM 数据作为地形的综合反映, 得到了中国平均气温空间分型和变化率精细化分布图。结果表明: 近50 年来中国北方大部分地区气温变化率多在0.4 oC/10a 以上, 西南和长江中下游部分地区气温变化率较小, 气温变化率为负值区零星状散落 在西南等地区。同时, 1881-2001 年中国9 个区域的气温资料分析表明, 近百年来中国气温变 化趋势以东北、华北、华东、华南、西北和新疆区是持续上升, 西南区呈下降型； 华中区呈倒"V" 型变化, 西藏区趋势不明显。
孙娴, 林振山 . 经验模态分解下中国气温变化趋势的区域特征[J]. 地理学报, 2007 , 62(11) : 1132 -1141 . DOI: 10.11821/xb200711002
In this paper, a new and advanced time series analysis method--the empirical mode decomposition (EMD) method is presented into climate analysis field. It is a method developed from analyzing nonlinear and non-stationary data. The oscillations of different scales or trend in the signal are decomposed into a number of characteristic intrinsic mode function components. This decomposition method is adaptive, and, therefore, highly efficient. Thus, we could extract the variation trend from the data. The testing results indicate that EMD method is the best one for extracting data trend at the present time. The climatic trend is very important in temperature change. Therefore, how to eliminate periodic oscillation in temperature change and obtain variation trend is the important process for estimating and comprehending global climate warming. In this study, temperature variation trends of monthly mean temperature data for 740 stations over China from 1951 to 2001 are diagnosed by EMD method, and there are three types of variation trends: ascending trend, descending trend, and fluctuation. Hereby, several temperature change regions have been divided in China and fields have been spatially classified. Simultaneously, the temperature variability of every station is calculated by this method, and classification chart of long term trend and temperature variability distribution chart of China are obtained, supported by GIS, 1km×1km resolution. The results show a large scale warming trend in China, especially Northeast China, Inner Mongolia, Gansu, the west of Qinghai and Tibet, and the north of Xinjiang witnessing marked warming, as opposing to the descending trend patches distributed over Southwest China and the middle and lower Changjiang valley.
Key words： China; temperature; empirical mode decomposition; intrinsic mode function
[1] Solomon S, Qin D, Manning M et al (eds). IPCC, 2007: Climate Change 2007--The Physical Scientific Basis. Cambridge, United Kingdom and New York, NY, USA: Cambridge University Press.
[2] Zhang Xiangong. Some characteristics of temperature variation in China in the present century. Acta Meteorologica Sinica, 1982, 40(2): 198-208.
[张先恭. 本世纪我国气温变化的某些特征. 气象学报, 1982 , 40(2): 198-208.]
[3] Tu Qipu, Deng Ziwang, Zhou Xiaolan. Study of regional characteristics on mean annual temperature variation of near 117 years in China. Quarterly Journal of Applied Meteorology, 1999, 10 (suppl.): 34-42.
[屠其璞, 邓自旺, 周晓兰. 中 国近117 年年平均气温变化的区域特征研究. 应用气象学报, 1999, 10 (增刊): 34-42.]
[4] Wang Shaowu, Ye Jinlin, Gong Daoyi. Construction of China's annual mean temperature series of the last 100 years. Journal of Applied Meteorological Science, 1998, 9(4): 392-401.
[王绍武, 叶瑾琳, 龚道溢等. 近百年中国年气温序列 的建立. 应用气象学报, 1998, 9(4): 392-401.]
[5] Shi Neng. 4-phase climate change features in the last 100 years over China. Acta Meteorologica Sinica, 1995, 53(4): 431-439.
[施能. 中国近100 年来4 个年代际的气候变化特征. 气象学报, 1995, 53(4): 431-439.]
[6] Lin Xuechun, Yu Shuqiu, Tang Guoli. Temperature series of the past 100 years for China. Scientia Atmospherica Sinica, 1995, 19(5): 525-534.
[林学椿, 于淑秋, 唐国利. 中国近百年温度序列. 大气科学, 1995, 19(5): 525-534.]
[7] Zhao Zongci, Wang Shaowu, Xu Ying et al. Attribution of the 20th century climate warming in China. Climatic and Environmental Research, 2005, 10(4): 807-817.
[赵宗慈, 王绍武, 徐影等. 近百年我国地表气温趋势变化的可能原 因. 气候与环境研究, 2005, 10(4): 807-817.]
[8] Tang Guoli, Ren Guoyu. Reanalysis of surface air temperature change of the last 100 years over China. Climatic and Environmental Research, 2005, 10(4): 791-798.
[唐国利, 任国玉. 近百年中国地表气温变化趋势的在分析.气候与环 境变化, 2005, 10(4): 791-798.]
[9] Song Lianchun. Spatial and temporal change of China surface air temperature over the past 40 years. Journal of Applied Meteorological Science, 1994, 5(1): 119-124.
[宋连春. 近40 年我国气温时空变化特征. 应用气象学报, 1994, 5(1): 119-124.]
[10] Chen Longxun. Study on climate change of China over the past 45 years. Acta Meteorologica Sinica, 1998, 56 (3): 257-271.
[陈隆勋. 中国近45 年来气候变化的研究. 气象学报, 1998, 56(3) : 257-271.]
[11] Tu Qipu, Deng Ziwang. Study on regional feature of China temperature variation. Acta Meteorologica Sinica, 2000, 58 (3): 288-296.
[屠其璞, 邓自旺. 中国气温异常的区域特征研究. 气象学报, 2000, 58(3): 288-296.]
[12] Ren Guoyu. Climate changes of China's mainland over the past half century. Acta Meteorologica Sinica, 2005, 63(6): 942-956.
[任国玉. 近50 年中国地面气候变化基本特征. 气象学报, 2005, 63(6): 942-956.]
[13] Ren Guoyu. Changes of surface air temperature in China during 1951-2004. Climatic and Environmental Research. 2005, 10(4): 717-727.
[任国玉. 近54 年中国地面气温变化. 气候与环境研究, 2005, 10(4): 717-727.]
[14] Huang N E, Shen Z, Long S R et al. The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis. Proc R Soc Land A, 1998, 454: 899-955.
[15] Huang N E, Shen Z, Long S R. A new view of nonlinear water waves: The Hilbert spectrum. Ann Rev Fluid Mech, 1999, 31: 417-457.
[16] Deng Yongjun, Wang Wei, Qian Chengchun et al. EMD method and transact boundary problem of Hilbert transform. Chinese Science Bulletin, 2001, 46(3): 257-263.
[邓拥军, 王伟, 钱成春等. EMD 方法及Hilbert 变换中边界问题的 处理. 科学通报, 2001, 46(3): 257-263.]
[17] Coughlin K T, Tung K K. 11-year solar cycle in the stratosphere extracted by the empirical mode decomposition method. Advance in Space Research, 2004, (34): 323-329.
[18] Sun Xian, Lin Zhenshan. A new technology HHT and its diagnosis for ENSO. Meteorological Monthly, 2006, 32(9): 17-22.
[孙娴, 林振山. HHT 新技术及其对ENSO 的诊断. 气象, 2006, 32(9): 17-22.]
[19] Lin Zhenshan, Wang Shuguang. EMD analysis of solar insolation. Met.&Atmo.Phys., 2006, 93(2): 123-128.
[20] Lin Zhenshan, Wang Shuguang. The 100ka period problem of solar radiation. Chinese Journal of Geophysics, 2004, 47 (6): 1093-1097.
[21] Hao Jinping, Huang Daji. Mirror extending and circular spline function for empirical mode decomposition method. Journal of Zhejiang University (Science), 2001, 2: 247-252.
[22] Ding Yihui, Dai Xiaosu. Temperature variation in China during the last 100 years. Meteorological Monthly, 1994, 20 (12): 19-26.
[丁一汇, 戴晓苏. 中国近百年来的温度变化. 气象, 1994, 20(12): 19-26.]
[23] Ma Zhenfeng, Peng Jun. Climate variation of Southwest China in recent 40 years. Plateau Meteorology. 2006, 25(4): 633-642.
[马振峰, 彭俊. 近40 年西南地区的气候变化事实. 高原气象, 2006, 25(4): 633-642.]
[24] Li Xiaowen, Zhou Xiuji, Li Weiliang et al. The cooling of Sichuan province in recent 40 years and its probable mechanisms. Acta Meteorologica Sinica, 1995, 9(1): 57-68.
[25] Qiu Jinhuan, Lin Y R. A parameterization model of aerosol optical depths in China. Acta Meteorologica Sinica, 2001, 59(3): 368-372.
[26] Xu Qun. Abrupt change of the mid-summer climate in central east China by the influence of atmospheric pollution. Atmos. Environ., 2001, 35:5029-5040.
[27] Luo Yunfeng, Zhou Xiuji, Li Weiliang. A numerical study of the atmospheric aerosol climate forcing in China. Chinese Journal of Atmospheric Sciences, 1999, 23(1): 1-12.
[28] Lu Aigang, He Yuanqing, Zhang Zhonglin et al. Regional sensitivities of the response to the global warming across China in the 20th century. Journal of Glaciology and Geocryology, 2005, 27(6): 827-832.
[ 卢爱刚, 何元庆, 张忠林 等. 中国大陆对全球变暖响应的区域敏感性分析, 冰川冻土, 2005, 27(6): 827-832.]
[29] Liu Hongli, Zhu Wenqin. Cliamtic analysis of the cloud over China. Acta Meteorologica Sinica, 2003, 61(4): 466-473.
[刘洪利, 朱文琴. 中国地区云的气候特征分析. 气象学报, 2003, 61(4): 466-473.]
[30] Liu Yan, Weng Duming. Climatological study of temperature effects of cloud-radiative forcing in the earth-atmospheric system over China. Acta Meteorologica Sinica, 2002, 60(6): 766-773.
[刘艳, 翁笃鸣. 中国地区云对地—气系统辐射 强迫温度效应的气候研究. 气象学报, 2002, 60(6): 766-773.]
[31] Zhao Zongci, Wang Shaowu, Xu Ying et al. Attribution of the 20th century climate warming in China. Climatic and Environmental Research, 2005, 10(4): 808-817.
[赵宗慈, 王绍武, 徐影等. 近百年我国地表气温趋势变化的可能原 因. 气候与环境研究, 2005, 10(4): 808-817.]
[32] Chen Longxun, Zhu Wenqin, Zhou Xiuji. Characteristics of envionmental and climate change in Changjiang Delta and its possible mechanism. Acta Meteorologica Sinica, 2000, 14(1): 129-140.
[33] Chen Longxun, Zhu Wenqin, Zhou Xiuji et al. Characteristics of the heat island effect in Shanghai and its possible mechanism. Advances in Atmospheric Sciences, 2003, 20(6): 991-1001.
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