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极盖
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  polar cap
     Generally the phase, of the potential distribution outside the polar cap is different from that of the driving potential at the polar cap, and so are the phases of the region 1 and 2 field-aligned currents.
     一般说来,极盖区外电场分布的位相与极盖区边界的驱动势不同,一、二区场向电流的位相与驱动势也有差异。 这些现象都是场向电流与电导率共同影响的结果。
短句来源
     A COMPARATIVE STUDY OF MAGNETIC STORM EFFECTS ON THE IONOSPHERE IN THE POLAR CAP AND AUROAL OVAL—F-REGION NEGATIVE STORM
     磁暴期间极光椭圆与极盖区电离层效应比较研究——F区负暴
短句来源
     With coordinated EISCAT and ESR radar data, ionospheric storm in both the dayside polar cap and the auroral oval during the major magnetic storm of May 15, 1997 is studied, focusing on the F region negative storm.
     联合利用EISCAT和E Svalbard非相干散射雷达数据 ,研究 1 997年 5月强磁暴期间向阳侧极盖与极光椭圆区电离层F区负暴 .
短句来源
     It is found that in both the polar cap and the auroral zone a F1 like peak of ionization appeared at 190km height during the main and recovery phases of the storm; while the normal F2 peak disappeared and great depletions of electron density occurred.
     发现在磁暴主相和恢复相初期 ,极光椭圆和极盖区电离层都在大约 1 90km高度出现类似F1的峰 ,F2主峰完全消失 ,F区电子密度大幅度下降 .
短句来源
     At night the electron density is very low when the station situates at the polar cap area.
     夜间进入极盖区后 ,电子密度则很低 .
短句来源
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  “极盖”译为未确定词的双语例句
     Several forms of the driven potential θ0(t) on ionospheric polar boundary were used to calculate the time evolution of the region 2 field-aligned current J(2)(t) and the ionospheric electric field E (t).
     本文用极盖边界上电离层驱动电位φ_0随时间变化的不同模式计算了场向电流J~(2)及电离层对流电场E的演化过程。
短句来源
     With EISCAT-Svalbard Radar observations from March,1999 to February,2003,a statistical analysis is made on the electron density variations in different seasons around solar maximum to in- vestigate the characteristics of background ionosphere at polar cusp latitudes.
     本文利用 EISCAT-Svalbard 雷达1999年3月至2003年2月期间观测数据,对太阳活动高年前后极区电离层 F 区电子密度随高度和地方时的二维分布进行统计分析,研究极隙/极盖区背景电离层特征,并与 IRI-2001模式预测结果进行比较。
短句来源
     However, in winter the occurrences of F region near afternoon cusp and midnight are much less. We think this phenomenon is caused by the high-latitude ionospheric trough and polar hole; After further analysis of F region spread, we find that the duration of aurora oval passing over the Zhongshan Station t_(TL) is from 16:00 to 20:00h.
     冬季月份 在磁地方时午后和子夜F层出现率明显减少,这可能与南半球冬季的高纬槽和极洞有关.对 F层不均匀区的分析认为,中山站在t_(LT)为16:00左右处于极光带赤道侧,20:00左右进入极盖 区。
短句来源
     WT5BZ] Two induction magnetometers have been installed at Zhongshan and Davis Stations, Antarctica respectively.
     南极中山站和戴维斯站 (不变磁纬 74.5°S)白天中午位于磁层极隙区 ,夜间位于极盖区或极光带的极向边沿。
短句来源
     SZ2 has the orbit with 400 km height and inclination of 42°, and ZY1 has solar-synchronous orbit and 780km to the Earth surface.
     “资源一号”卫星运行于太阳同步轨道 ,高度约 80 0km ,和宁静时期的统计结果对比 ,这次耀斑后 ,星内粒子探测器在地球极盖区 (地球开磁场区 )观测到耀斑粒子的出现 ,这是宁静时期没有的 ;
短句来源
  相似匹配句对
     The Equatorial Counter Electrojet and the Electrostatic Potential Across the Polar Cap
     反向赤道电集流与驱动势
短句来源
     Bungee Jump
     蹦
短句来源
     The electron density is much lower at night in the polar cap areas.
     夜间进入区后 ,电子密度则很低。
短句来源
     CENERALIZED POLAR DECOMPOSITION
     广义分解
短句来源
     The Cover Type Refrigerator
     式冰箱
短句来源
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  polar cap
Polar Wind Observations on the Nightside of the Polar Cap at Altitudes of 2-3 RE: Results of the INTERBALL-2 Satellite
      
The results of measuring the fluxes of ionospheric ions in the nightside polar cap at an altitude of about 20 000 km are presented.
      
By analyzing the distribution functions of the fluxes measured, we have isolated six different types of ionospheric plasma flows in the polar cap.
      
Around midnight, this electrojet was extended in the poleward direction up to the polar cap latitudes (Φ' ≈ 75°-83°).
      
Polar cap structures (PCSs) isolated from the halobacterium were preliminarily identified as the DLSs.
      
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This paper gives a comprehensive review on the geophysical effect of the great solar outbursts, July 1959 and November 1960. Main characteristics of geomagnetic storms, polar cap absorption (PCA) and ionosphere disturbances, solar flares and radio bursts, are briefly described. The analysis of cosmic ray phenomena during these two periods has been studied in great details: It includes topics relating to a survey of cosmic ray studies, various methods of analysis and deductions from solar proton outbursts, the...

This paper gives a comprehensive review on the geophysical effect of the great solar outbursts, July 1959 and November 1960. Main characteristics of geomagnetic storms, polar cap absorption (PCA) and ionosphere disturbances, solar flares and radio bursts, are briefly described. The analysis of cosmic ray phenomena during these two periods has been studied in great details: It includes topics relating to a survey of cosmic ray studies, various methods of analysis and deductions from solar proton outbursts, the complex study and aerological observations, and some comments on the future research carried in our country. A good list of references has also been appended.

本文对1959年7月及1960年11月有关太阳貭子爆发的各种地球物理效应,作了較全面和系統的論述。文中在§2—4分別敘述了这期間地磁場扰动、极盖区电波吸收观測与电离层变动情况、以及太阳耀斑与太阳射电爆发.根据以上情况,作者特別着重在§5中論述宇宙綫强度扰乱分析(包括各国进行研究的基本情况、若干特殊分析方法与結果簡介、关于綜合观测和高空探測),并在§6中提出了今后开展工作的几点初步意見。本文引用了北京台的磁暴与宇宙线强度变化記录,并附有較完全的文献目录。

The simple model, in which the region 2 field-aligned currents and the enhancement of the conductivities in the auroral zone are taken into account but the local time dependence of the conductivities is omitted, is constructed to make an exploration of the high-latitude E-fields. It is shown that E-fields are strengthened by the region 2 field-aligned currents within the area between the polar cap boundary and the currents circle but depressed outside it; the effects are controlled by both the intensity and...

The simple model, in which the region 2 field-aligned currents and the enhancement of the conductivities in the auroral zone are taken into account but the local time dependence of the conductivities is omitted, is constructed to make an exploration of the high-latitude E-fields. It is shown that E-fields are strengthened by the region 2 field-aligned currents within the area between the polar cap boundary and the currents circle but depressed outside it; the effects are controlled by both the intensity and the phase of the currents. The shielding caused by the enhancement of ∑H in auroral zone will strengthen the effects, but the enhancement of ∑p, however, will largely weaken them and the E-field will penetrate into the middle latitude. Generally the phase, of the potential distribution outside the polar cap is different from that of the driving potential at the polar cap, and so are the phases of the region 1 and 2 field-aligned currents. They are summing-up effects of all the factors mentioned above. The potentiality of the simple model method and the possible direction of its development are also discussed.

本文采用的是有二区场向电流但无电导率时角变化的简单模式。文章通过模式计算,系统讨论了在恒稳条件下二区场向电流强度及位相和Hall与Pederson电导率在极光带升高等因素对高纬电场分布的影响。模式说明,二区场向电流的存在使二区电流圈以内电场加强,其外电场大大削弱。这种加强与削弱作用与二区电流的强度与位相均有关。Hall电导率在极光区升高会加强上述作用,Pederson电导率的升高则对其有所削弱。一般说来,极盖区外电场分布的位相与极盖区边界的驱动势不同,一、二区场向电流的位相与驱动势也有差异。这些现象都是场向电流与电导率共同影响的结果。以下结果初步解释了近年来的某些观测现象。最后,本文对简单模式法的应用及今后的某些方向作了探讨。

On the basis of simple Senior-Blanc's time-dependent model and by using a step-varying field-aligned curret instead of potential as driving force, the temporal evolution of the ionospheric electric field was discussed. It is shown that configurations in both cases are similar; the relaxation time toward the steady state is about fifty minutes in both cases. But there are some differences between them: under current driving situation, the potential at the boundary of the polar cap is not constant but decreases...

On the basis of simple Senior-Blanc's time-dependent model and by using a step-varying field-aligned curret instead of potential as driving force, the temporal evolution of the ionospheric electric field was discussed. It is shown that configurations in both cases are similar; the relaxation time toward the steady state is about fifty minutes in both cases. But there are some differences between them: under current driving situation, the potential at the boundary of the polar cap is not constant but decreases exponentially toward the steady state; at the auroral zone the difference between the steady state and the initial time electric fields is very small. Furthermore, the steady state value of the field-aligned current 2 calculated from our model is even closer to the observed value. The latitudinal variation of the potential is steeper, and the maximum potential appears earlier. The calculated shielding factor and the shielding time c-aligned current driving.onstant show that the shielding effect under the current driving situation seems stronger than that in the potential driving case.

本文以Senior-Blanc的驱动电位随时间阶跃变化的简单模式为基础,讨论了随时间阶跃变化的场向电流驱动下电离层电场的时间演变。结果表明,场向电流驱动和电位驱动的总体过程是一致的。在两种情况下,有关物理量都经约50分钟的弛豫时间而趋向于稳定态。但两者也有一定的差异。这主要表现在,电流驱动下极盖区边界上的电位不再是常量,而是一个随时间作指数衰减的函数,最后趋于稳态值;极光区的稳态和初态电场相差不大。此外,电流驱动下场向电流2的稳态值小一些,似乎更接近于观测值;各区电位随纬度的变化更快些,最大电位出现的时间也更早一些。对屏蔽因子和屏蔽时间常数的计算表明,电流驱动比电位驱动的屏蔽要强些。这些都反映了电流驱动和电位驱动的不同特点。

 
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