| 1979-2008年华北地区对流层顶高度变化特征 |
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| 引用本文： | 张红雨,周顺武,张国勇,李毓富,李新生.1979-2008年华北地区对流层顶高度变化特征[J].辽宁气象,2011(2):8-13. |
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| 作者姓名： | 张红雨 周顺武 张国勇 李毓富 李新生 |
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| 作者单位： | [1]山西省气象局,山西太原030002 [2]南京信息工程大学,江苏南京210044 [3]晋城市气象局,山西晋城048000 [4]山西省气象台,山西太原030006 |
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| 基金项目： | 中国气象局成都高原气象研究所开放实验室基金（LPMZ008007）和国家自然科学基金（40675058）项目共同资助. |
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| 摘 要： | 利用1979—2008年华北地区12个测站逐日对流层顶探空资料，运用统计学方法对该地区不同类别对流层顶发生及其高度的季节特征进行探讨，并采用线性趋势、小波分析和EOF分解等方法对其高度变化等气候特征进行分析，揭示了该地区对流层顶的季节特征及其高度变化的基本事实和规律。结果表明：华北地区第一对流层顶冬季出现多，夏季少，近30a来呈减少趋势，第二对流层顶夏季出现多，冬季少，近30a来呈增加趋势；全年均出现复合对流层顶，且在季节转换时期出现频率较高；第一对流层顶高度年变程呈双峰型，夏季高，冬季低，第二对流层顶高度年变程呈单谷型，冬季高，夏季低，春、秋季介于两者之间；两类对流层顶高度变化均存在5-6a的周期，第二对流层顶相比具有更多时间尺度周期变化。近30a间华北地区第一、第二对流层顶年平均高度变化均呈升高趋势，且与其上下层间平均温度有关。
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| 关 键 词： | 华北地区 对流层顶 小波分析 EOF分解 |
Characteristics of variation in tropopause height from |
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| ZHANG Hong-yu,ZHOU Shun-wu,ZHANG Gong-yong,LI Yu-fu,LI Xin-sheng.Characteristics of variation in tropopause height from[J].Liaoning Meteorological Quarterly,2011(2):8-13. |
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| Authors: | ZHANG Hong-yu ZHOU Shun-wu ZHANG Gong-yong LI Yu-fu LI Xin-sheng |
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| Institution: | 1. Shanxi Meteorological Bureau, Taiyuan 030002, China; 2. Nanjing University of Information Science ＆ Technology,Nanjing 210044, China; 3. Jincheng Meteorological Bureau, Jincheng 048000, China; 4. Shanxi Meteorological Observatory, Taiyuan 030006, China) |
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| Abstract: | According to the tropopause height determined by the daily sounding data from 12 observational stations in the North China from 1979 to 2008 ,the occurrence of tropopauses of different types and their seasonal changes in height were analyzed in terms of methods of a linear trend, a wavelet analysis and an empirical orthogonal function （EOF）. The results show that the first tropopause appears more frequently in winter than in summer. The frequency of occurrence for the first tropopause has a decreasing trend in recent 30 years. The second tropopause occurs more frequently in summer than in winter and it has an increasing trend in the recent 30 years. Multiple tropopause always occurs in the whole year, especially during seasonal transition. The annual variations of the first and second tropopause heights are bimodal and unimodal,respectively. The fast tropopause height is higher in summer and lower in winter,while the second one is higher in winter and lower in summer. There is a 5-6 years cycle for both tropopause heights. Compared with the first tropopause height, the second one has multiple cycles with different time scales. The annual means of both tropopause heights show increasing trends,and they are related to the mean temperature between upper and lower layers. |
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| Keywords: | North China Tropopause Wavelet analysis Empirical orthogonal function （EOF） decomposition |
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