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   北美高压 的翻译结果: 查询用时:0.256秒
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北美高压
相关语句
  相似匹配句对
     HIGH PRESSURE HEAT EXCHANGER
     高压换热器
短句来源
     Gallnuts in North America
     北美的五倍子
短句来源
     Climates of North America
     《北美的气候》
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     High Pressure Airless Spray of Foundry Mould Coating
     铸型涂料的高压无气喷涂
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  north american high
Diverse cultures descended from these ancestors, not only the big-game hunting Clovis culture of the North American high plains.
      


Based on analysis of 500hPa synoptic maps associated with explosive extratropical cycloneactivity over northwest Pacific in winter(from Dec.to Feb.)of 1975—1984,five synoptic pat-terns of extratropical cyclone development have been summarized in this paper,which are:NorthAmerica High pattern(NAH),East Pacific High pattern(EPH),Mid Pacific High pattern(MPH),Berling Sea Blocking High pattern(BBH)and Pacific Low pattern(PL).The NAH and EPH pat-terns occur more frequently and last longer than others,and these two...

Based on analysis of 500hPa synoptic maps associated with explosive extratropical cycloneactivity over northwest Pacific in winter(from Dec.to Feb.)of 1975—1984,five synoptic pat-terns of extratropical cyclone development have been summarized in this paper,which are:NorthAmerica High pattern(NAH),East Pacific High pattern(EPH),Mid Pacific High pattern(MPH),Berling Sea Blocking High pattern(BBH)and Pacific Low pattern(PL).The NAH and EPH pat-terns occur more frequently and last longer than others,and these two patterns cyclones tend todevelop.This paper analyses further the tracking tendency of cyclones after their explosive devel-opment and concludes that:during the stable period of synoptic pattern,the cyclone tracks afterexplosive development are also stable,during the adjustment period of synoptic pattern,the cy-clone tracks change with the change of long wave system over 500hPa,while the wavelength de-creases.

本文利用1975—1984年12—2月北太平洋爆发性温带气旋资料以及500hPa 天气图,概括出气旋爆发式加强前12小时五种环流型,即北美高压型(NAH)、东太平洋高压型(EPH)、中太平洋高压型(MPH)、白令海阻高型(BBH)、太平洋低压型(PL)。以 NAH 型和 EPH 型出现的机会最多,稳定时间最长,并且在这两种天气形势下气旋最易发展。另外本文还分析了气旋爆发后的路径趋势,指出在形势稳定期,气旋爆发后的路径亦稳定;在形势调整期,气旋后期路径随太平洋长波系统的演变而变化。

The comparatively serious frostbite weather occurred in December, 1999 in Guangxi, and the year of 1999 is a year with the maximum temperature drop and most frost days since 1975. The analysis of the characteristics of 500hPa height field and sea level air pressure field in the same period and the relative field of 500hPa height in prior period shows that the strength and location of middle and high latitude land in Northern hemisphere and the strength of ground cold anticyclone are the main circulation situations...

The comparatively serious frostbite weather occurred in December, 1999 in Guangxi, and the year of 1999 is a year with the maximum temperature drop and most frost days since 1975. The analysis of the characteristics of 500hPa height field and sea level air pressure field in the same period and the relative field of 500hPa height in prior period shows that the strength and location of middle and high latitude land in Northern hemisphere and the strength of ground cold anticyclone are the main circulation situations influencing the frostbite in December of Guangxi. The strength and location of polar vortex in January and September, the strength of North America pressure ridge and the strength of low groove near Black Sea are the important influencing factors of the frostbite in December of Guangxi.

通过对 1999年 12月广西严重霜冻天气同期 5 0 0 h Pa高度场和海平面气压场特征及前期 5 0 0 h Pa高度的相关场分析 ,得到北半球中高纬度槽脊的位置与强度 ,地面大陆冷高压强弱 ,是影响广西 12月霜冻的主要环流形势 ;当年 1月、 9月极涡强度、位置 ,北美高压脊强度 ,及黑海附近低槽强弱 ,是影响广西 12月霜冻天气重、轻的重要因子。

Study is undertaken of > 30 year slowly-varying means, called climate base state (CBS), of northern winter AAC's in the past 100 years and more, with the CBS variability and its temporal evolution investigated, indicating that Aleutian low and Icelandic low (North Pacific high and North American high) experience maximum (minimum) variation in the CBS. The CBS exhibits two modes for its variation. The positive (negative) phase of mode I presents a weak (strong) NAO, a weaker (stronger) NPO, a robust (feeble)...

Study is undertaken of > 30 year slowly-varying means, called climate base state (CBS), of northern winter AAC's in the past 100 years and more, with the CBS variability and its temporal evolution investigated, indicating that Aleutian low and Icelandic low (North Pacific high and North American high) experience maximum (minimum) variation in the CBS. The CBS exhibits two modes for its variation. The positive (negative) phase of mode I presents a weak (strong) NAO, a weaker (stronger) NPO, a robust (feeble) Siberian high and a quite weak (vigorous) Aleutian low whilst the positive (negative) phase of mode II reveals a feeble (strong) Aleutian low and a weak (robust) Siberian high. Also, the research shows that the recent CBS of northern circulations is in a remarkably negative phase of mode I and a noticeably positive phase of mode II, viz., in the background of slowly-varying circulations of an exceptionally weak Siberian high, an extremely vigorous Aleutian low and an intense NAO. The background field is likely to persist for a matter of 30 years such that northern winter temperature is expected to be in such a warm situation for a long period to follow.

通过研究近100多年北半球全部大气活动中心30年以上的慢变平均值(气候基本态)、气候变率特征及时间演变规律,指出阿留申低压与冰岛低压的基本态改变最大。基本态变化最小的是北太平洋高压,其次是北美高压。基本态的变化表现为两个基本模态:第一模态为弱(强)的NA0,较弱(强)的NPO,强(弱)的西伯利亚高压和较弱(强)的阿留申低压的特征;第二模态主要表现为弱(强)的阿留申低压及弱(强)的西伯利亚高压的特征。近期北半球环流基本态是处于第一模态明显的负位相,第二模态明显的正位相下,即特别弱的西伯利亚高压、特别强的阿留申低压及强NA0的慢变环流背景下。这种慢变的环流背景场还可能维持30年左右。所以北半球冬季今后还将长期处于气候暖背景下。

 
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