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  • 11
    Electronic Resource
    Electronic Resource
    Effects of the interplanetary magnetic field sector structure in the winter ionosphere (1986)
    Springer
    Studia geophysica et geodaetica 30 (1986), S. 297-303 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Description / Table of Contents: Summary The ionospheric effects of the interplanetary magnetic field (IMF) sector boundary crossings are studied for the winters of 1963–69. They are considerably stronger for “proton” than for “non-proton” sector boundaries. There are two different types of effects. The “geomagnetic” type is a disturbance, observed in geomagnetic activity, the night-time ionosphere and the day-time F2 region near the geomagnetic equator. The effect in the ionosphere is interpreted in terms of the IMF sector boundary crossing related changes in geomagnetic activity. The “tropospheric” type is aquietening, observed in tropospheric vorticity and in the day-time mid-and low-latitude ionosphere (except the geomagnetic equator region). The mechanism of this effect remains unexplained.
    Notes: Резюме Иссле¶rt;уюmся uоносферные эффекmы nересеченuŭ секmорноŭгрaнuцы межnлaнеmного мaгнumного nоля (ММП) ¶rt;ля зuм 1963–69г. Онu сущесmвенно сuльнее ¶rt;ля „nроmонных“ чем ¶rt;ля нормaльных секmорныхгрaнuц. Сущесmвуюm ¶rt;вa оm¶rt;ельных muna эффекmов. „Геомaгнumныŭ“ являеmся возмущенuем, нaблю¶rt;aнным вгеомaгнumноŭ aкmuвносmu, ночноŭ uоносфере u ¶rt;невноŭ F2 облaсmu вблuзuгеомaгнumного эквamорa. Собыmuя в uоносфере являюmся сле¶rt;сmвuем uзмененuŭгео мaгнumноŭ aкmuвносmu, коmорые вызвaны nересеченuем секmорноŭгрaнuцы ММП. „Троnосферныŭ“ mun являеmся усnокоенuем, нaблю¶rt;енным в зaвuхренносmu mроnосферы u в ¶rt;невноŭ сре¶rt;не- u нuзкошuроmноŭ uоносфере (зa uсключенuем облaсmuгеомaгнumного эквamорa). Мехaнuзм эmого эффекma неuзвесmен.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01645469
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  • 12
    Electronic Resource
    Electronic Resource
    Strato-mesospheric ozone and IMF sector boundary (1989)
    Springer
    Studia geophysica et geodaetica 33 (1989), S. 101-103 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Description / Table of Contents: Summary We find no effect of the interplanetary magnetic field(IMF) sector boundary crossing in ozone at altitudes ranging from the middle stratosphere(10 hPa) to the lower mesosphere(0.4 hPa) at middle latitudes(40°–60° N), based on winter data over the period of December 1979–December 1982.
    Notes: Резюме Мы не нaшлu нuкaко о эффекma nересеченuя секmорноŭ рaнuцы межnлaнеmно о мa нumно о nоля в озоне в облaсmu высоm меж¶rt;у сре¶rt;неŭ сmрamосфероŭ(10 Пa) u нuжнеŭ мезосфероŭ(0,4 Пa) нa сре¶rt;нuх шuроmaх(40°–60° с.ш.), nрuменяя зuмнuе ¶rt;aнные зa nерuо¶rt; ¶rt;екaбрь 1979 – ¶rt;екaбрь 1982 .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01649635
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  • 13
    Electronic Resource
    Electronic Resource
    The interplanetary magnetic field sector structure and meteorological microseisms (1977)
    Springer
    Studia geophysica et geodaetica 21 (1977), S. 168-178 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary Meteorological microseisms, recorded at the Prague seismic station and, similarly, at other Central Europe stations, reflect certain meteorological situations in the North Atlantic frontal zone. Meteorological elements in this zone are affected by some factors of extra-terrestrial origin, among others by the interplanetary magnetic field (IMF) sector structure. The analysis of the 68 IMF sector boundary passage effects in microseismic activity, expressed in microseismic amplitudes, showed a well-developed minimum of microseismic activity on the day of the boundary passage in winter, but no such effect in spring and autumn. In spring and autumn, however, a tendency was observed to slightly higher microseismic activity in the “away” (+) sector, whereas no such tendency was observed in winter. These results agree with the IMF effect found in the troposphere. Generally, the IMF sector structure is only a modulating rather than a major factor controlling the microseismic activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01634828
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  • 14
    Electronic Resource
    Electronic Resource
    Meteorological microseisms and stratospheric warmings (1979)
    Springer
    Studia geophysica et geodaetica 23 (1979), S. 98-100 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The meteorological microseisms recorded at Prague are found to be essentially independent of the occurrence of the major midwinter stratospheric warmings. This finding contributes to studying the downward propagation mechanism of some extraterrestrial influences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01628070
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  • 15
    Electronic Resource
    Electronic Resource
    TheT e-T n difference in the lowerE region and radio-wave absorption (1981)
    Springer
    Studia geophysica et geodaetica 25 (1981), S. 294-296 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The difference observed between the electron temperature, T e , and the neutral atmosphere temperature, T n , is shown to be able to contribute significantly to the observed variability of ionospheric radio-wave absorption (A1 andHF-A3 measurements).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01591942
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  • 16
    Electronic Resource
    Electronic Resource
    Diurnal asymmetry of radio wave absorption on anomalous winter days (1982)
    Springer
    Studia geophysica et geodaetica 26 (1982), S. 313-315 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Резюме Анaлuз uзмеренuя nо лощенuя рa¶rt;uоволн нa З чaсmоmaх зa nерuо¶rt; 1966–1981 nокaзaл, чmо в сре¶rt;нем, незaвuсuмо оm mо о, еслu основное nо лощенuе зuмоŭ выше ¶rt;о uлu nосле nолу¶rt;ня, ¶rt;оnолнumельное nо лощенuе в aномaльных ¶rt;нях все ¶rt;a выше nосле nолу¶rt;ня. В эmом смысле зuмнuе aномaльные ¶rt;нu блuже леmнuм условuям.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01635040
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  • 17
    Electronic Resource
    Electronic Resource
    Effects of the imf sector structure in the midlatitude troposphere and stratosphere (1986)
    Springer
    Studia geophysica et geodaetica 30 (1986), S. 394-403 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Description / Table of Contents: Summary The data on geopotential heights and temperatures at 7 pressure levels between 1000-10 hPa above Berlin(52.5 °N, 13.4 °E) are analysed for the winters of 1963–1973. No demonstrable effect of the interplanetary magnetic field sector boundary crossing (IMF SBC) is found in the lower and middle stratosphere, but there is a demonstrable effect in the middle troposphere at the 500 hPa level. This effect is less important than the IMF SBC effect in the tropospheric vorticity area index and seems to be of a different type.
    Notes: Резюме Анaлuзuруюmся ¶rt;aнные nогеоnоmенцuaльноŭ высоmе u mемnерamуре нa 7 уровнях nосmоянного ¶rt;aвленuя меж¶rt;у 1000-10 мбaр нa¶rt; Берлuном(52,5 °с.щ., 13,4 °в.¶rt;.) ¶rt;ля зuм 1963–1973г. Нuкaкоŭ ¶rt;окaзamельныŭ эффекm nересеченuя секmорноŭгрaнuцы межnлaнеmного мaгнumного nоля(ПСГ ММП) не у¶rt;aлось нaŭmu в нuжнеŭ u сре¶rt;неŭ сmрamосфере, но maкоŭ эффекm нaŭ¶rt;ен в сре¶rt;неŭ mроnосфере нa уровне 500 мбaр. Эmоm эффекm менее вaжен, чем эффекm ПСГ ММП в uн¶rt;ексе nлощa¶rt;u зaвuхренносmu amмосферы, u кaжеmся быmь ¶rt;ругого muna.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01646382
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  • 18
    Electronic Resource
    Electronic Resource
    Do Solar Flares Affect Total Ozone? (1998)
    Springer
    Studia geophysica et geodaetica 42 (1998), S. 533-539 
    Details
    ISSN: 1573-1626
    Keywords: total ozone ; lower ionosphere ; solar flares
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Abstract An analysis of total ozone from Hradec Králové (50.25°N, 15.21°E) and of radio wave absorption in the lower ionosphere at 1539 kHz (reflection point 50.3°N, 11.8°E) shows that there is no detectable effect of strong solar flares in total ozone, no correlation between total ozone and absorption on a day-to-day time scale, and that strong solar flares do not affect this correlation. Thus the long-term correlation of monthly average values (Alberca et al., 1996) is not reproduced on a day-to-day time scale, and the effects of strong geomagnetic storms in total ozone (Laštovička et al., 1992; Mlch and Laštovička, 1996) have no counterpart in effects of strong solar flares.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1023353306498
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  • 19
    Electronic Resource
    Electronic Resource
    Winter anomaly observations at the Panská Ves Observatory (Czechoslovakia), 1971–1973 (1976)
    Springer
    Studia geophysica et geodaetica 20 (1976), S. 404-408 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The results of the winter anomaly observations at the Panská Ves Observatory on 2775 kHz and 2614 kHz (A3 method, feq≈1 and 0.8 MHz) are studied for the winters of 1971/72 and 1972/73. Ionospheric responses to minor (1972) and major stratospheric warmings are found to be different and relatively small. A regular winter-anomaly background absorption increase with a maximum in January was observed during both winters studied. Magnetic storms are found to play an insignificant, if any, role in the winter-anomaly phenomenon. The relation between magnetic activity and ionospheric absorption seems to be better in non-anomalous periods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01617654
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  • 20
    Electronic Resource
    Electronic Resource
    Diurnal asymmetry in the lower ionosphere — seasonal variability (1978)
    Springer
    Studia geophysica et geodaetica 22 (1978), S. 309-313 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary On the basis of long period measurements of ionospheric absorption in five A3 circuits in Central Europe, it is shown that the considerable seasonal variation of the diurnal asymmetry of absorption, found in[1], exhibits practically no year-to-year variability and is well-developed at equivalent frequencies f eq ≲1 MHz, while it vanishes at F eq ≲2 MHz. The limited data on the diurnal asymmetry of the D-region electron concentration are consistent with the seasonal pattern of the diurnal asymmetry in absorption. A tentative hypothesis of nitric oxide variability as the cause of the seasonal variation of the asymmetry is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01627909
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