【摘 要】
：
The SABER/TIMED temperatures taken in 2002-2006 are used to delineate the tidal signals in the middle and upper atmosphere. Then the Hough mode decomposition is
【机 构】
：
Institute of Atmospheric Physics, Chinese Academy of Sciences, PO Box 9804, Beijing 100029
论文部分内容阅读
The SABER/TIMED temperatures taken in 2002-2006 are used to delineate the tidal signals in the middle and upper atmosphere. Then the Hough mode decomposition is applied with the DE3 tide, and the overall features of the seasonal variations and the complete global structures of the tide are observed. Investigation results show that the tide is most prominent at 110km with the maximal amplitude of ＞ 9K, and exhibits significant seasonal variation with its maximum amplitude always occurring in July every year. Results from the Hough mode decomposition reveal that the tide is composed primarily of two leading propagating Hough modes, i.e., the (-3, 3) and the (-3, 4) modes, thus is equatorially trapped. Estimation of the mean amplitude of the Hough modes show that the (-3, 3) mode and (-3, 4) mode exhibit maxima at 110 km and 90 kin, respectively. The (-3, 3) mode plays a predominant role in shaping the global latitude-height structure of the tide, e.g., the vertical scale of > 50 km at the equator, and the annual course. Significant influence of the (-3, 4) mode is found below 90kin, where the tide exhibits anti-symmetric structure about the equator; meanwhile the tide at northe tropical latitudes exhibits smaller vertical wavelength of about 30 kin.
其他文献
在物理探究教学中,要提高猜想与假设的质量,必须明确它在探究教学中的作用,提出实施猜想与假设的有效策略以培养学生的能力。一、猜想与假设在物理探究教学中的意义猜想是指
前不久，与一家长闲聊，谈及现在的孩子往往以自我为中心，不太在乎父母的感受，甚至忽视父母的存在。笔者作为以教师为职业的家长，对此深有感触。现今，不少孩子面对父母的爱习以为常，在他们看来父母的爱是天经地义，因此而理所当然地享受着这份爱，心里却未怀有一丝感恩。班上的孩子在此方面如何呢？ 我觉得很有必要在班上落实感恩教育，可一时却不知何处切入。一天，读到一份“特殊的考卷”，该试卷分为A、B面，A面的内容
By employing the exact diagonalization method,we investigate the low-energy behaviour of the dimerized spinless fermion chains with quasiperiodic modulation.It
所谓“男孩危机”，就是由于现行教育模式、社会流行文化、父母教育理念等因素的影响，使男孩在学业成就、体质、心理以及社会适应等方面面临的重重危机。“男孩危机”的主要表现是：男子汉偶像缺位，责任意识缺失，性别意识缺乏，竞争能力下降等。《国家中长期教育改革和发展规划纲要》指出要“关心每个学生，促进每个学生主动地、生动活泼地发展，尊重教育规律和学生身心发展规律，为每个学生提供适合的教育”。作为一线教育工作者
每当圣诞节来临之际，美国西部就会流行一种幸运游戏：谁能吃到面包里的一颗橄榄，谁来年就会得到好运，并会事事吉祥。因此，每个人在圣诞节前夜都希望能吃到藏有橄榄的面包。有一年圣诞前夜，正是伍德公司成立的日子。但员工对公司的前景并不看好，甚至是没有信心，仅有的五名技术人员也是得过且过，如果有更好的去处，他们随时都会离开。那夜，伍德请他们吃饭，结果每个人都得到了橄榄。没错，这是伍德让面包师把带有橄榄的面包做
【本刊讯】目前,高清监控设备的像素越来越高,百兆交换机已不能满足大码流的视频传输,千兆交换机已然成为高清监控的标配。腾达Tenda全新推出8口千兆桌面式铁壳交换机TEG1008
We introduce a feedback mechanism to study the spreading of an epidemic by analytical methods and large scale simulations in exponential networks. It is found t
说起实验,人们马上就会想到“物理实验”、“化学实验”、“生物实验”.然而,一说到数学实验,人们立即都会表现出茫然和困惑.在大多数人的印象中,数学是一门纯理论的科学,抽
Most epidemic models for the spread of diseases in contact networks take the assumption of the infected probability of a susceptible agent dependent on its abso
正交和反交是两个相对的概念,表现型为不同的两种个体甲和乙杂交。如果将甲作父本,乙作母本定为正交,那么以乙作父本,甲作母本则定为反交。其中,甲是显性性状,乙是隐性性状。