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极锋
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  polar front
     The chief fronts studied are sub-Antarctic front (SFA) , polar front (PF) and continental-water-boundary (CWB).
     其中,主要的海洋锋面有:亚南极锋(SAF),极锋(PF)和陆缘水边界(CWB);
短句来源
     Convergence is stronger than divergence in the Polar Front Zone(PFZ),indicating that a part of the converging water must come from the cold water transporting northward from south of PFZ and contribute to the formation and maintenance of the lateral temperature gradient of SAF.
     极锋区(PFZ,指极锋PF与亚南极锋SAF之间的区域)中辐聚大于辐散,部分辐聚的水体必定来自极锋以南向北输送的温度更低的上层水,对SAF水平温度梯度的形成和维持做出贡献。
短句来源
     Below 600hPa, the front of east Asia was Mei-yu front; Mei-yu equatorial front and polar front from the south to the north;
     在600hPa以下,东亚地区的经向方向锋区从南到北依次表现为梅雨锋,梅雨赤道缝和极锋
短句来源
     (4) There exist close relation between the floods season precipitation in Northeast China and the anomalies of subtropical summer monsoon , the anomalies of cold air, Sub-tropical anticyclone, polar front jet, North hemisphere general circulation anomalies in winter.
     (4)东北汛期降水与西南夏季风、北方冷空气、副热带高压、极锋急流、前期冬季环流异常密切相关。
短句来源
     The dynamic condition of this weather process is related with the effect of divergence in the lower level and convergence in the upper level on 200hPa at the right side in the exit of the polar front jet stream and the left side of the entrance of the subtropical jet stream.
     200hPa极锋急流出口区南侧和副热带急流入口区北侧的由于高空辐合、低层辐散,及下沉运动的动力加压作用,为这次高温天气的加强和维持提供了有利的动力条件。
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  polar-front
     Through the long-term air-sea interactions,the prophase SSTA affected the later general circulation. There are significant differences in the sea-level pressure anomaly(SLPA),height anomaly at 500 hPa and zonal wind anomaly at 300 hPa fields in the warm/cold years in the key areas,especially notably differences in the Siberia high,East Asian trough,polar-front jet and the locations of polar vortices,resulting in winter temperature anomalies in Dalian.
     长时间的海气相互作用使前期的海温异常影响了后期的大气环流,在关键海区冷、暖水年,海平面气压距平场、500hPa高度距平场、300hPa纬向风距平场都存在着显著的差异; 其中西伯利亚高压、极涡的位置、东亚大槽的强弱、极锋急流都差异显著,从而导致大连地区冬季气温的异常。
短句来源
  “极锋”译为未确定词的双语例句
     while above 600hPa, there was only Mei-yu front.
     而在600hPa以上,只是极锋型的梅雨锋的单一结构。
短句来源
     Based on the results of harmonic analysis of pentad average heights of 500mb during the years 1972-1980, the characteristics of ultra-long waves in relation to the plum rains of middle and lower Yangtze river are analysed.
     根据1972—1980年500mb候平均高度谐波分析资料,分析了长江中下游梅雨期间1、2、3波振幅和位相的特征。 发现:60°N 1—3波的振幅与极锋急流的活动有关;
短句来源
     The results show that the abnormal precipitation in Northern Xinjiang in winter is related to the features of circulation in middle- high latitude over Eurasia and the polar frontal zone in middle latitude over Xinjiang.
     指出北疆冬季降水偏多、偏少与欧亚中高纬环流特征有关,与新疆上空中纬度极锋锋区有关。
短句来源
     In the Indian Ocean section o f the Southern Ocean, the Subtropical Front, the Subantarctic Front and Polar Fr ont showed obviously spatio-temporal variations and their locations changed gre atly in different year.
     在普里兹湾所处的印度洋区段 ,亚热带锋、亚南极锋极锋表现出显著的时空变化 ,特别是不同年份的锋面位置存在较大的摆动。
短句来源
     The primary production is believed to be mainly iron-limited. However, on the north side of the gradient (0.25-0.56uM/km), where the concentration of the is 1-15uM, the primary production is considered as Si-limited.
     南极的生产力限制主要认为是Fe限制 ,但在 [Si(OH) 4 ]的浓度梯度 (极锋附近的 [Si(OH) 4 ]剧烈变化带 ,其浓度以 0 .2 5 - 0 .5 6uM km速度向南发展 )以北的南大洋 ([Si(OH) 4 ]浓度为 1- 15uM) ,形成Si限制。
短句来源
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  polar front
A theoretical analysis and a numerical modeling are carried out for the Polar Front of the Barents Sea.
      
The zones of increased Cchs values (0.6-2.0 and over 2.0 mg/m3) were located between the Southern Subtropical and Subantarctic fronts, near the Polar front, and to the south of the Antarctic Divergence.
      
On verification of the new criterion of adiabaticity by numerical simulation of acoustic propagation through the polar front
      
In this paper, numerical simulation has been conducted for acoustic propagation through the Polar Front to verify the new criterion.
      
Special conditions favoring the convective activity were a wave disturbance at the polar front, convective instability at the time of its maximum development, and effects of upland and of proximity of the sea.
      
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A synoptic and aerological study on a cold wave in the Far East is made during the periodof the break down of the blocking situation over Euroasia and Atlantic.It is found thatduring this period the hemispherical circulation pattern is markedly changed.It is changedfrom low index pattern into high index pattern.The onset of the cold wave occured duringthe period of changes.The source of the arctic air for this cold wave may be traced upstream tothe Arctic Ocean to the east of Greenland.Furthermore,the structure...

A synoptic and aerological study on a cold wave in the Far East is made during the periodof the break down of the blocking situation over Euroasia and Atlantic.It is found thatduring this period the hemispherical circulation pattern is markedly changed.It is changedfrom low index pattern into high index pattern.The onset of the cold wave occured duringthe period of changes.The source of the arctic air for this cold wave may be traced upstream tothe Arctic Ocean to the east of Greenland.Furthermore,the structure of the jet streams over125°E during the cold wave is analysed.Two distinct jet streams—polar front jet and thesubtropical jet—were found.

作者对1956年2月下旬的一次东亚寒潮天气,进行了天气学的分析。分析得出,在寒潮爆发的时期,原先维持在大西洋和乌拉尔上空的阻塞高压发生崩溃。北半球的环流型式亦表现有极明显的改变,即从低指数的环流变向高指数的环流。此次寒潮的冷空气源地,一直可以溯源至格林兰东方的北冰洋上。此外,对此次寒潮爆发时期中,东经125度上空急流的结构亦作了分析,我们发现在这个时期中,有两个急流出现——即极锋急流及副热带急流。

Using radio-soundings and pilot ballon wind observations of January andJuly 1956,the water vapour transfer and water balance over Eastern Chinaare calculated.Together with the seasonal variations of monsoon circulation,the transferof water vapour in summer is quite different from that in winter.However,in both seasons the inflow of water vapour from the south are much moretmportant than that either from west or from north.In comparison with theiotal transfer,the eddy transfer in general is less important,but...

Using radio-soundings and pilot ballon wind observations of January andJuly 1956,the water vapour transfer and water balance over Eastern Chinaare calculated.Together with the seasonal variations of monsoon circulation,the transferof water vapour in summer is quite different from that in winter.However,in both seasons the inflow of water vapour from the south are much moretmportant than that either from west or from north.In comparison with theiotal transfer,the eddy transfer in general is less important,but it is relativelyremarkable along the frequent paths of disturbances in the said season.During month of July 1956,this continent is shown to be a water sourceEvapotransporation is larger than precipitation.

本文利用1956年1月和7月探空和测风纪录,计算了我国东部大陆的水汽输送和7月的水份平衡.随着季风环流的转变,我国水汽输送冬夏有显著的不同.但无论冬夏均以南方海洋输入的水汽为最主要.在水汽的总输送量中,涡流输送一般只佔次要地位.最大涡流输送位于我国中部,冬季它与高压移动路径一致,夏季与极锋平均位置相合.1956年7月我国大陆是个水汽源地,蒸腾量大于降水量.

During summer very often there is a heavy-rain bearing west-east shear line in the lower troposphere over Yangtze-Hwai valley. To the north of the shear line, the wind is predominantly from east or northeast, and to the south from the west or southwest. Its appearance is most evident on 850 and 700 mb surface.In this paper a case study of this type of shear line is made. It is shown that the dynamical and thermal effects of Tibet plateau is the one of the important factors for its formation.The analysis of the...

During summer very often there is a heavy-rain bearing west-east shear line in the lower troposphere over Yangtze-Hwai valley. To the north of the shear line, the wind is predominantly from east or northeast, and to the south from the west or southwest. Its appearance is most evident on 850 and 700 mb surface.In this paper a case study of this type of shear line is made. It is shown that the dynamical and thermal effects of Tibet plateau is the one of the important factors for its formation.The analysis of the three dimensional wind field in the region of the shear line, shows that the pattern of the vertical circulation has an important influence on the horizontal distribution of temperature and humidity near the shear line, thus it is closely related to the genesis and development of the low level frontal zone.Moreover, several problems concerning the synoptic meteorology in subtropics over Far East during summer are discussed. They include: the influence of vertical circulation on the frontal zone; the process of the transformation of a polar front into an equatorial front and the nature of the some weather systems in subtropical region of China in summer. The author has offered several explanations about these characteristics.

本文研究一次江淮流域切变线的生成及其各个发展阶段的結构。 关于切变线的生成原因,作者强調高原的动力及热力影响。在結构方面,作者指出,切变綫附近鉛直环流的形式、切变线附近气象要素的分布以及低空鋒区的加强,相互之間有着密切联系.鉛直环流的加强,造成了低空鋒区的加强。当这个环流圈相对于鋒面的位置有变化时,鋒面的性貭,也就有不同。在切变线的上升运动区上空,高层对流层中,可能存在一下沉运动带,因而与切变线有关的流場,至少涉及到整个对流层。 最后,作者討論了:鉛直环流对鋒面的作用、极鋒型鋒区向赤道鋒的轉变以及我国副热带夏季某些系統的性貭及其特点等問題。

 
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