pentad

A principal component analysis of the North Pacific 500 hPa pentad height field

北太平洋500hpa候高度场的主成分分析

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On the Time-Space Structure of the Correlations between the Pentad Precipitations and the Pentad Mean 500 mb Circulation in China

我国候降水量与亚洲500毫巴候平均环流相互关系的时空结构

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When El Nino or La Nina happens, there is a 50-day fluctuation period in the pentad precipitation in rainy season of Yunnan.

当发生EL Nino或La Nina异常气候事件时，云南雨季的候降水存在50天振荡周期；

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500-mb pentad height data from 1972 through 1980 are used for calculating mean zonal kinetic energy, eddy kinetic energy and the rate of their conversion.

然后利用1972&80年逐候北半球500毫巴高度资料计算出纬圈平均运动动能、涡动动能及两者间的转换率。

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In terms of these quasi-periodic oscillations, a statistical forecast scheme has been designed, with which a set of eight successive pentad mean height forecast at 500 mb level over the Northern Hemisphere can be made.

利用这一特征，设计了一个用周期外延叠加的预报方案。每次接连预报未来8个候的北半球500毫巴候平均高度。

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Persistent anomalies of 500 hPa pentad mean height in summer and persistent droughts in the north of China

夏季500hPa候平均高度场的多年持续性异常与我国北方持续干旱

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Finally the pentad sequences of atactic PEMA were calculated based on the discussion mentioned above.

最后计算了无规PEMA的五元组立构序列分布。

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This method is tested with the data of the 500 hPa pentad height-fields over the North Pacific for years 1971 through 1987, and also compared with other methods of selecting analogs.

并利用北太平洋500hpa候高度场资料进行了实验，同时与其它相似方法进行了比较。

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The correlation coefficients of pentad precipitation between stations in Guangdong are computed using three methods.

用3种方法计算了广东候降水相关性，发现用候降水量距平计算的相关系数能较科学划分广东区域降水区划；

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While there is a 75-85 day fluctuation period in the pentad precipitation in rainy season of Yunnan, the precipitation anomaly percentage in the main flood period ( June to August) in Yunnan is positive;

当云南雨季存在75~85天振荡时，云南主汛期（6~8月）降水距平百分率为正（除2000年为零距平）；

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Pentad Average Temperature Changes of Inner Mongolia During Recent 40 Years

近40年内蒙古候平均气温变化趋势

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The tropical convection that related to the genesis of a TC is triggered by the northeast monsoon flow a pentad before the tropical cyclone occurs.

在生成前1候东北季风有明显的激发热带对流扰动作用。

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Teleconnections and Features of Circulation in the Pentad Mean 500 hPa Height Field During the Northern Hemisphere Summer

北半球夏季500hPa候平均高度场的遥相关和环流特征

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This paper investigates the pentad mean atmospheric circulation fields at 500 hPa during the period from June 15,2005 to June 25,2005 and the pentad following. The low frequency oscillation characteristics of rainstorm in central areas are also analyzed.

分析2005年6月15~25日广东出现的连续暴雨过程及结束期的500hPa候平均环流场，并对4~9月暴雨中心区域的降水低频振荡特征进行了分析。

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Seasonal Changes Characteristic of Pentad Average Temperature in Liuzhou City in Recent 48 Years

近48年柳州市侯温度及季节变化分析

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According to Pentad rainfall distribution in China, its Pattern may be divided into five types.

根据我国各地区候降水分布特征，可将降水分为五个类型。

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The Representations of the Low-frequency Fluctuation for the Pentad Precipitation in Summer in the Middle-lower Reaches of the Yellow River Valley

黄河中下游地区夏季逐候降水量的低频振荡特征

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The average PCD in Altay region was0.205; the average PCP was the38.12 pentad.

阿勒泰全区汛期降水平均集中度为0.205，平均集中期为第38.12侯。

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The motive is gradually revealed through the analysis of the five terms of the pentad& scene, agent, agency act and purpose and the dominant ratios in the corporate PSA on TV.

对戏剧五因素（场景、行为者、行为、方法和目的）和这五因素之间占主导地位的关系对子的分析中，企业电视公益广告的动机被逐渐揭示出来。

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Precipitation, convection, and west wind begin to retreat southwestward at pentad 60 ( late October).

在60候（10月末）左右开始向西向南撤退。

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Three stages and two abrupt jumps exist in the climatological onset process of Bay of Bengal ( BOB) summer monsoon: ( 1) on Pentad 23, westerly and convection start to build up in the southeastern part of BOB.

气候学意义下孟加拉湾夏季风的建立进程表现为三个阶段和两次突然北跳：（1）西风及对流活动于第23候在孟加拉湾南端开始建立。

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A Dynamic-Statistical Analysis of the Kinetic Energy Variations in the Mean Pentad Circulation at 500-mb in the Northern Hemisphere

北半球500毫巴候平均环流动能变化的动力统计学分析

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A pattern classification of the mean pentad circulations at 500 MB level over East Asia for each NSS by the method of k-mean cluster analysis

应用K均值聚类法对东亚各自然天气季节500毫巴候平均环流的分型试验

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In the fifth pentad of May 1998, the main positive contributions mainly come from latent heating processes, boundary effect and vertical temperature convection.

对1998年5月第5候南海地区近地面候平均最大非地转起主要贡献因子为：潜热加热，边界效应，垂直温度对流。

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A mean pentad subtropical high ring belt at 500 mb surrounding almost the whole northern hemisphere collapsed unstably and then an intense subtropical high cell which had formed over the west Pacific moved westward, intensified and extended pentad by pentad.

500毫巴一个几乎围绕整个北半球的候平均副高环带不稳定崩解.在西太平洋形成一个强大的副高单体，逐候向西移动，增强和扩展。

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Pentad, decade and monthly mean SST fields derived from radiation measurements by satellite

由卫星辐射测量资料计算候、旬和月平均海面温度场

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Pentad of noncollinear points

非共线点的拼五小组

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In strong Plateau monsoon year, ridge axis of South Asia high jump to the north in June which is earlier 1 pentad than normal year, and withdraw to south in August which is later 1 or 2 pentads and nearly vice versa.

高原季风强年，南亚高压脊线6月北跳比多年平均早1候，8月南撤晚1～2候；

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By analyzing the polar plots of the pentad average temperatures, it is clear that the patterns of the pentad average temperature changes are different in different regions and seasons.

绝大部分地区大多数候平均气温都有所上升，而且候平均气温变化存在纬向地带性。

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The results indicate that the interrelations between the three parameters for kinetic energy of the mean pentad circulation as well as their seasonal and other periodical variations are analogous to, but smaller than, those of the instantaneous circulation.

结果表明，候平均环流动能三参数的相互关系及其季节变化与瞬时环流的情况相类似，但数量上小于瞬时环流。

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