The atmospheric electric agitation and its origin     

H. Israël 《Pure and Applied Geophysics》1959,42(1):140-142

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Lehrbuch der bodenkunde: Scheffer,Fritz und Paul Schachtschabel (1970): 7. Aufl. 447 S., 121 Abb., 70 Tab., 1 Farbtafei. Stuttgart: Enke Verlag,DM 56,-     

Pál Stefanovits 《Geoforum》1972,3(3):86

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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   

Remarks concerning the “ten-year-period” of atmospheric electricity     

Prof. Dr. Hans Israël 《Meteorology and Atmospheric Physics》1968,17(1):88-89

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Buchbesprechungen     

F. Steinhauser  W. Mörikofer  H. Israël  M. Toperczer 《Meteorology and Atmospheric Physics》1953,6(1):114-128

Ohne Zusammenfassung  相似文献   

Hans Benndorf †     

H. Israël  M. Toperczer 《Meteorology and Atmospheric Physics》1953,6(1):111-113

Ohne Zusammenfassung

---

Hans Benndorf

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Multi-wavelength observations of the onset phase of a coronal mass ejection     

Innes  D.E.  Inhester  B.  Srivastava  N.  Brekke  P.  Harrison  R.A.  Matthews  S.A.  Noëns  J.C.  Schmieder  B.  Thompson  B.J. 《Solar physics》1999,186(1-2):337-361

The structure and dynamics of the initial phases of a coronal mass ejection (CME) seen in soft X-ray, extreme ultraviolet and optical emission are described. The event occurred on the SW limb of the Sun in active region AR 8026 on 9 April 1997. Just prior to the CME there was a class C1.5 flare. Images taken with the Extreme Ultraviolet Imaging Telescope (EIT) reveal the emergence of a candle-flame shaped extreme ultraviolet (EUV) cavity at the time of the flare. Yohkoh images, taken about 15 min later, show that this cavity is filled with hot X-ray emitting gas. It is most likely that this is the site of the flare. Almost simultaneous to the flare, an H surge or small filament eruption occurs about 50 arc sec northwards along the limb from the EUV cavity. At both the site of the core of the hot, EUV cavity and the filament ejection are X-ray jets. These jets seem to be connected by hot loops near their bases. Both jets disappear within a few minutes of one another.Clear evidence of the CME first appeared in the Large Angle Spectrometric Coronagraph (LASCO) and EIT images 40 min after the flare and onset of the filament ejection. It seems to come from a region between the two X-ray jets. This leads to the speculation that magnetic field reconnection near one footpoint of a loop system triggers reconnection near its other footpoint. The loop system is destabilized and ultimately gives rise to the CME. This possibility is supported by magnetic field and H images taken when the active region was at disk center which show that the active region had a double bipole structure with dark H filaments between the bipoles.  相似文献   

Flexible Automatic Scheduling for Autonomous Telescopes: The MAJORDOME     

Mathieu Bringer  Michel Boër  Cedric Peignot  Gérard Fontan  Colette Mercé 《Experimental Astronomy》2001,12(1):33-48

We have developped a new method for the scheduling ofastronomical automatic telescopes, in the framework of theautonomous TAROT instrument. The MAJORDOME software canhandle a variety of observations, constrained, periodic,etc., and produces a timeline for the night, which may bemodified at any time to take into account the specificconditions of the night. The MAJORDOME can also handletarget of opportunity observations without delay.  相似文献   

Modelling of diffusion boundary-layers in subtidal macroalgal canopies: The response to waves and currents     

Craig L. Stevens  Catriona L. Hurd  Pål E. Isachsen 《Aquatic Sciences - Research Across Boundaries》2003,65(1):81-91

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Stable isotope (C,O, S) systematics of the mercury mineralization at Idrija,Slovenia: constraints on fluid source and alteration processes     

Jo?t?V.?Lavri?Email author  Jorge?E.?Spangenberg 《Mineralium Deposita》2003,38(7):886-899

The world-class Idrija mercury deposit (western Slovenia) is hosted by highly deformed Permocarboniferous to Middle Triassic sedimentary rocks within a complex tectonic structure at the transition between the External Dinarides and the Southern Alps. Concordant and discordant mineralization formed concomitant with Middle Triassic bimodal volcanism in an aborted rift. A multiple isotopic (C, O, S) investigation of host rocks and ore minerals was performed to put constraints on the source and composition of the fluid, and the hydrothermal alteration. The distributions of the ¹³C and ¹⁸O values of host and gangue carbonates are indicative of a fracture-controlled hydrothermal system, with locally high fluid-rock ratios. Quantitative modeling of the ¹³C and ¹⁸O covariation for host carbonates during temperature dependent fluid-rock interaction, and concomitant precipitation of void-filling dolomites points to a slightly acidic hydrothermal fluid (¹³C–4 and ¹⁸O+10), which most likely evolved during isotopic exchange with carbonates under low fluid/rock ratios. The ³⁴S values of hydrothermal and sedimentary sulfur minerals were used to re-evaluate the previously proposed magmatic and evaporitic sulfur sources for the mineralization, and to assess the importance of other possible sulfur sources such as the contemporaneous seawater sulfate, sedimentary pyrite, and organic sulfur compounds. The ³⁴S values of the sulfides show a large variation at deposit down to hand-specimen scale. They range for cinnabar and pyrite from –19.1 to +22.8, and from –22.4 to +59.6, respectively, suggesting mixing of sulfur from different sources. The peak of ³⁴S values of cinnabar and pyrite close to 0 is compatible with ore sulfur derived dominantly from a magmatic fluid and/or from hydrothermal leaching of basement rocks. The similar stratigraphic trends of the ³⁴S values of both cinnabar and pyrite suggest a minor contribution of sedimentary sulfur (pyrite and organic sulfur) to the ore formation. Some of the positive ³⁴S values are probably derived from thermochemical reduction of evaporitic and contemporaneous seawater sulfates.Editorial handling: P. Lattanzi  相似文献