European Surface Pressure Patterns for Months with Outstanding Climatic Anomalies During the Sixteenth Century     

Jucundus Jacobeit  Heinz Wanner  Gerhard Koslowski  Martin Gudd 《Climatic change》1999,43(1):201-221

Monthly mean surface pressure patterns in the European area are reconstructed for those winter and summer seasons of the 16th century with outstanding climatic anomalies being either widespread over Europe or remarkably intensive in some European regions. From the available documentary information about weather characteristics and their sequences, it proved possible to infer prevalent processes of lower tropospheric advection of typical air masses and to assess the position and strength of major surface pressure centres on a monthly scale. For comparison with modern pressure patterns, monthly mean sea level pressure (SLP) grids from the 20th century have been selected for seasons with similar climatic anomalies. There are broad coincidences between these pressure patterns of the 16th and the 20th centuries except for cold summer seasons. Finally, results from the 16th century are discussed in terms of circulation dynamics (different phases of the North Atlantic Oscillation (NAO) in winter, decreasing frequency of anticyclonic ridging in summer).  相似文献   

Book Review: The search for extraterrestrial intelligence: A philosophical inquiry. By David Lamb     

Karl‐Heinz Schmidt 《Astronomische Nachrichten》2001,322(4):216-216

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Delimiting the eastern extent of the Altyn Tagh Fault: Insights from structural analyses of seismic reflection profiles     

Yuqing Zhang  Fengqi Zhang  Xiaogan Cheng  Xiubin Lin  Hanlin Chen  Karl‐Heinz Wyrwoll  Lei Wu  Jie Chen  Bryan Krape  Yanchou Lu  Weiwei Ding  Kaixuan An  Yaguang Chen  Chunyang Li 《地学学报》2021,33(1):1-11

The Altyn Tagh Fault (ATF) serves as a key continental‐scale controlling structural element of the Tibetan Plateau. However, its eastward extent remains controversial. Here we use high‐resolution seismic reflection profiles to investigate the subsurface structures of the easternmost ATF and use these to delimit the easternmost extent of the fault. The structural analyses show an eastward geometric change from transpressional positive flower structures to compressional thrusts, with transpression‐induced shortening magnitudes decreasing eastwards from a maximum of ~5.3 km to being absent. Stratigraphic controls indicate that the deformation took place over the last ~<1.2 Ma. Our wider findings lead us to: (a) reject the suggestion that the ATF previously extended beyond the Kuantan Shan‐Hei Shan to link with the Alxa‐East Mongolia Fault; and (b) propose that the rigid block model used to describe the Tibetan Plateau crust is not consistent with the extent and structural details of the easternmost ATF.  相似文献   

A weathering index for CK and R chondrites     

Alan E. RUBIN  Heinz HUBER 《Meteoritics & planetary science》2005,40(8):1123-1130

Abstract— We present a new weathering index (wi) for the metallic‐Fe‐Ni‐poor chondrite groups (CK and R) based mainly on transmitted light observations of the modal abundance of crystalline material that is stained brown in thin sections: wi‐0, <5 vol%; wi‐1, 5–25 vol%; wi‐2, 25–50 vol%; wi‐3, 50–75 vol%; wi‐4, 75–95 vol%; wi‐5, >95 vol%; wi‐6, significant replacement of mafic silicates by phyllosilicates. Brown staining reflects mobilization of oxidized iron derived mainly from terrestrial weathering of Ni‐bearing sulfide. With increasing degrees of terrestrial weathering of CK and R chondrites, the sulfide modal abundance decreases, and S, Se, and Ni become increasingly depleted. In addition, bulk Cl increases in Antarctic CK chondrites, probably due to contamination from airborne sea mist.  相似文献   

Observations of Lunar Transient Phenomena (LTP) in 1972 and 1973     

Heinz Hilbrecht  Gerd Küveler 《Earth, Moon, and Planets》1984,30(1):53-61

A list of reports of Lunar Transient Phenomena (LTP) which have been observed in 1972 and 1973 by an international group of amateur astronomers is given. From 907 monitoring observations (1972: 526, 1973: 381) 92 LTP (74 reliable, 18 possible individual sightings) have been reported (1972: 52, 1973: 40) including parallel observations of the same event. The LTP were brightenings, shadings, flashes, colours, moving clouds and brightness diminutions of stars before occultations. 45 LTP events may be expected to be real in a catalogue of criteria for the reliability of observations. Sixteen events have been reported by several independent observers. A short examination of the temporal distributions of monitoring observations and recorded LTP is given.  相似文献   

Solar line blocking for disk-center and disk-averaged radiation from 3300 to 6860 Å     

Heinz Neckel  Dietrich Labs 《Solar physics》1985,95(2):229-238

The line blocking is tabulated for 10 Å ( < 6300 Å) or 20 Å ( > 6300 Å) wide intervals. It follows from the spectral averages and the local continuum derived by Neckel and Labs from high-resolution Fourier transform spectra, which had been obtained by J. Brault at Kitt Peak. The internal accuracy (the scatter) is in the order of 0.1%. Significant systematic errors arising from local distortions of the adopted continuum level can be excluded. Larger errors are to be expected only near the Balmer limit, where the localization of the continuum is very ambiguous.  相似文献   

A data model for moving regions of fixed shape in databases     

Florian Heinz  Ralf Hartmut Güting 《International journal of geographical information science》2018,32(9):1737-1769

Moving object databases are designed to store and process spatial and temporal object data. An especially useful moving object type is a moving region, which consists of one or more moving polygons suitable for modeling the spread of forest fires, the movement of clouds, spread of diseases and many other real-world phenomena. Previous implementations usually allow a changing shape of the region during the movement; however, the necessary restrictions on this model result in an inaccurate interpolation of rotating objects. In this paper, we present an alternative approach for moving and rotating regions of fixed shape, called Fixed Moving Regions, which provide a significantly better model for a wide range of applications like modeling the movement of oil tankers, icebergs and other rigid structures. Furthermore, we describe and implement several useful operations on this new object type to enable a database system to solve many real-world problems, as for example collision tests, projections and intersections, much more accurate than with other models. Based on this research, we also implemented a library for easy integration into moving objects database systems, as for example the DBMS Secondo (1) (2) developed at the FernUniversität in Hagen.  相似文献   

The provenance of Australian uranium ore concentrates by elemental and isotopic analysis     

Elizabeth Keegan  Stephan Richter  Ian Kelly  Henri Wong  Patricia Gadd  Heinz Kuehn  Adolfo Alonso-Munoz 《Applied Geochemistry》2008

Elemental and isotopic ratio analyses of U ore concentrate samples, from the 3 operating U mining facilities in Australia, were carried out to determine if significant variations exist between their products, thereby allowing the U ore concentrate’s origin to be identified. Elemental analyses were conducted using inductively coupled plasma mass spectrometry (ICP-MS) and X-ray fluorescence spectrometry (XRF). Lead isotope ratios were measured using ICP-MS and U isotope analyses were conducted using thermal ionisation mass spectrometry (TIMS). Minute quantities of sample, such as that obtained from a swipe, were also examined for elemental concentrations using secondary ion mass spectrometry (SIMS). The results of multivariate statistical analysis show clear patterns in the trace elemental composition of the processed U ores, indicating that it is possible to use this feature as a unique identifier of an Australian U ore concentrate’s source. Secondary ion mass spectrometry analyses also allow individual particles to be differentiated using this ‘fingerprinting’ technique. Isotope ratios determined using TIMS reveal that there is a significant difference in the n(²³⁴U)/n(²³⁸U) isotope ratio between the U ore concentrate from each mine.  相似文献   

Das Hochperioden-Überlagerungslot,ein Universallot hoher Empfindlickeit     

Heinz Gabler 《Ocean Dynamics》1949,2(6):242-245

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Zur Theorie der seismischen Bodenunruhe     

Heinz Menzel 《Ocean Dynamics》1949,2(5):169-177

Zusammenfassung Nach einer Theorie von Press und Ewing entsteht die seismische Bodenunruhe dadurch, daß atmosphärische Energie von der Meeresoberfläche in einer Kompressionswelle durch das Wasser auf den Ozeanboden übertragen und im Untergrunde in einer elastischen Welle den Kontinenten zugeleitet wird. Es wird der Effekt der von Press und Ewing vernachlässigten Reibung des Wassers am Meeresboden abgeschätzt. Das wesentlichste Ergebnis der Theorie von Press und Ewing, die quantitativ richtige Erklärung der in der seismischen Bodenunruhe zu beobachtenden Perioden durch den Effekt der Dispersion, bleibt auch bei Berücksichtigung der Reibung näherungsweise erhalten. Der Effekt der Dispersion bei den Wellen, die nach der Wiechertschen Brandungshypothese entstehen würden, wird auch abgeschätzt. Er führt zu einer Periode von 11,9 sec, ein Wert, der etwas zu hoch ist. Die Rechnungsgrundlagen sind aber sehr unsicher.

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On the theory of microseisms

Summary According to a theory advanced by Press and Ewing atmospheric energy is transmitted to the sea-bottom by compression waves and forwarded to the continents by elastic oscillations of the sub-soil. In the paper that follows an estimate is made of the effect of friction (of the water on the sea-bottom), an effect which has been neglected by Press and Ewing. The outstanding result of their theory, the explanation of the periods observed in microseisms as an effect of dispersion (which is quantitatively correct), is found to remain approximately valid if friction is taken into account. In addition the effect of dispersion is estimated for waves corresponding to Wiechert's surf hypothesis, and a period of 11,9 sec is found, which is somewhat too high. The bases of calculation are, however, by no means reliable.

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Herrn Prof. Dr. F. Errulat, seinem verehrten Lehrer, zum 60. Geburtstage gewidmet vom Verfasser.  相似文献