Forecast of abnormally high solar activity in the next century and of its possible negative effects on the earth     

Miloslav Kopecký  Reviewer V. Bucha 《Studia Geophysica et Geodaetica》1987,31(1):43-59

Summary Based on the relation between the relative sunspot number R, the number of sunspot groups f ₀ generated per unit time on the Sun as a whole and their average lifetime T ₀ , and on the extrapolation of time behaviour of f ₀ and T ₀ , it is proved that abnormally high solar activity may be expected in the first half of the 21st century. At this time, the maximum annual relative sunspot numbers R_M of the 11-year cycles should reach values of about 300 units. This abnormally high solar activity in the next century can be understood as the antipole of the Maunderean minimum. This forecast is used to discuss some of the possible consequences of this abnormally high solar activity for the processes on the Earth: changes of climate (heat waves and draughts in Central Europe), in the higher layers of the Earth's atmosphere (anomalous propagation of radio waves, increased effect of the density of the upper atmosphere on the orbits of man-made satellites), in seismicity (increased seismic activity in Europe and Southeast Asia), for technical devices (induced electric currents), in the biosphere. etc.

---

a mu ¶rt; uau a R nm, unn nm f ₀ uu ¶rt;uu u a ë u u ¶rt; n¶rt;ummu uu ₀ , u a manuu ¶rt;a f ₀ u ₀ , naa, m n nu ¶rt; 21 a u¶rt;am uum amum. aua¶rt;u ua a R m¶rt; 11-mu ua m u ¶rt;muam au 300 ¶rt;uu. m uum amum ¶rt; nuam a amun¶rt; a¶rt; uua. a m na ¶rt;am m n¶rt;mu m uum amumu a n nmau a : a uu uama (aa u a n¶rt;a ¶rt; n), a u u am u (aa anmau a¶rt;u, uu n nmmu u am a ¶rt;uu um m), a um (na ua amum n u -m uu), a muu mma (u¶rt;ua muu mu), a u u ma ¶rt;a.

  相似文献   

The intensity of the earth's magnetic field in the past derived from the archaeomagnetic data     

S. P. Burlatskaya  Václav Bucha  Reviewer A. Janáčková 《Studia Geophysica et Geodaetica》1972,16(4):407-410

a n¶rt;u¶rt; amuu amua uuu anmuaum n a n¶rt;u 8500 m nm um au aam m uuu m naama. ¶rt;u u ¶rt;a ¶rt; u ¶rt; m¶rt; mumu auu nau nuu aau mama [1–3] (Puc. 1.B). nma aau auau (Puc.2) mnaua m m m¶rt;a, ¶rt; au n¶rt; amu u, m n¶rt;u 2- ma m, mmu naa auu nu¶rt; n¶rt;a 1000 m u 350 m, au a aumu, mmm 80%- mmu. am au ¶rt;a u anmu ¶rt; m¶rt; mumu (mum) naa auu u¶rt; ma u ¶rt; m naama[5] (Puc. 3). uma a mam nma aaua naaa auu nu¶rt; n¶rt;a 750 m, 200 m u a — 300 m. (Puc. 4.) nmu u ¶rt;a nma amua an¶rt;u n¶rt;u n u ma m (au) auumu m ¶rt;m m (Puc. 5). aa a m¶rt;m nu naamaum n aam ¶rt;uu mu au, anum¶rt;a m uua nm m¶rt;a.

---

---

Dedicated to Academician Alois Zátopek on His 65th Birthday  相似文献   

Remanent magnetism of anorganic and organic substances and its exploitation in treating historical problems     

Václav Bucha  Reviewer J. Anděl 《Studia Geophysica et Geodaetica》1971,15(3-4):353-363

Summary Properties of the thermoremanent magnetization of various archaeological materials (baked-clay objects, samples from old trees, bones and stones) were investigated with the purpose to assess the possibility of their use for the determination of the earth's magnetic field in the historical past and to apply the data for solving some practical problems. It turns out that most of those materials yield magnetic values that can be used for making the radiocarbon dating method more accurate, for determining the degree of burning and for direct archaeomagnetic dating. The new conclusions also contribute to the knowledge of changes in the earth's magnetic field in the past.  相似文献   

The continuous pattern of variations of the geomagnetic field in the quaternary and their causes     

Václav Bucha  Reviewer A. Janáčková 《Studia Geophysica et Geodaetica》1973,17(3):218-231

  相似文献   

Precision A.C. bridge set for measuring magnetic susceptibility of rocks and its anisotropy     

Vít Jelínek  Reviewer V. Bucha 《Studia Geophysica et Geodaetica》1973,17(1):36-48

Summary A bridge set for measuring the magnetic susceptibility of rocks and its anisotropy is described. The classical transformer bridge has been supplemented with an auxiliary compensating arm for balancing the bridge without any mechanical infringement of the measuring coils. By employing this principle and the appropriate methods a sensitivityof 4 × 10 ^–8 SI units (3 × 10 ^–9 e.m.u./cm³) has been achieved for a sample of 8 cm³ in volume. In addition to its high sensitivity the device has a considerable accuracy, which makes it suitable for susceptibility anisotropy measurements even of samples with a very low susceptibility and only slight anisotropy. Well-reproducible results have been achieved for samples with a mean susceptibility of the order of10 ^–5 SI units with an anisotropy degree of only about 1.05.Institute of Applied Geophysics.  相似文献   

Dynamic manifestations of the geomagnetic field in the Quaternary continental sediments of Czechoslovakia     

Václav Bucha  Josef Horáček  Reviewer A. Janáčková 《Studia Geophysica et Geodaetica》1973,17(4):321-336

Summary The paper brings a brief geological asessment of the sedimentational cycles, analyses the methods of collection and investigation of samples and the representativeness of the results obtained. Problems of magnetic cleaning and the types of demagnetization curves investigated are discussed. The continuous nature of the variations of the magnetic declination, inclination and remanent magnetization, determined by palaeomagnetic investigation of Quaternary sediments, is also discussed. The conclusion contains the principal facts about the dynamics of the geomagnetic field in the Quaternary and points out the possibility of applying them to the theory of the geomagnetic field, as well as to geological correlations.  相似文献   

Twenty five years of the Geophysical Institute of the Czechoslovak Academy of Sciences     

Václav Bucha 《Studia Geophysica et Geodaetica》1978,22(2):208-212

  相似文献   

Magnetic properties of natural Mn-oxides     

Vladimír Kropáček  Miroslav Krs  Reviewer V. Bucha 《Studia Geophysica et Geodaetica》1975,19(3):261-274

Summary The paper is devoted to the study of the magnetic properties, of the volume magnetic susceptibility in a weak magnetic field, of the specific magnetic susceptibility in a strong magnetic field, of natural remanent magnetization and its stability in A.C. fields, and of the temperature dependence of magnetic susceptibility of natural Mn-oxides. Samples of pyrolusite, polianite, manganite, hausmannite, psilomelan and wad from different localities all over the world were studied; the measured values are statistically treated so that the given values are valid in general. Hausmannite displayed typical values of the magnetic susceptibility, different from the values of the other Mn-oxides. In general, many natural Mn-oxides contain heterogeneous admixtures of Fe-oxides, which are responsible for their ferromagnetic properties. A high degree of magnetic hardness, predetermining the minerals for palaeomagnetic research, was proved with many of the natural Mn-oxides.  相似文献   

Palaeomagnetism and continental drift     

Václav Bucha  Reviewer M. Krs 《Studia Geophysica et Geodaetica》1975,19(3):300-305

  相似文献   

Zusammenfassende Bearbeitung der geomagnetischen Landesaufnahmen von Österreich und der Tschechoslowakei     

V. Bucha  W. Seiberl  E. Trapp 《Meteorology and Atmospheric Physics》1978,27(2):183-194

  相似文献