Stabilität und Labilität im Kaltfrontbereich     

Dr. Heinrich Faust 《Pure and Applied Geophysics》1949,15(1-2):156-167

Zusammenfassung So wie für das Himmelsbild in einer einheitlichen Luftmasse der vertikale Temperaturgradient die wichtigste Rolle spielt, so erweist sich für den Wetterablauf beim Kaltfrontdurchgang die vertikale Temperaturschichtung im Frontbereich von entscheidender Bedeutung. In den Registrierungen der meteorologischen Elemente zeigt sich meist deutlich der Unterschied zwischen «stabilen» und «labilen» Kaltfronten.

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Summary As significant the part, played by the vertical lapse rate of temperature in the appearance of the sky in uniform airmasses, as determinant for weather conditions during the passage of a cold front is the vertical lapse rate of temperature in the frontal area. Generally, the recordings of meteorological instruments show a pronounced difference between «stable» and «unstable» coldfronts.

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Zum Vortrag des Herrn Dr. Breddin: Löß, Flugsand und Niederterrasse im Niederrheingebiet,ein Beitrag zur Frage der Entstehung des Löß (Geol. Rundschau,Bd. XVIII, 1927, S. 72–78)     

Heinrich Quiring 《International Journal of Earth Sciences》1927,18(2):132-133

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Druckfehlerberichtigung     

Heinrich Kölbel 《International Journal of Earth Sciences》1940,31(5-6):448

Ohne Zusammenfassung  相似文献   

The Bremen ocean bottom tiltmeter (OBT) – a technical article on a new instrument to monitor deep sea floor deformation and seismicity level     

Marcus Fabian  Heinrich Villinger 《Marine Geophysical Researches》2007,28(1):13-26

The Bremen ocean bottom tiltmeter is a new 6000 m-depth deep sea instrument for autonomous observation of sea floor tilt with signal periods longer than 7.5 s. The instrument also records vertical acceleration in the frequency range from DC to 1 Hz. The tiltmeter has an Applied Geomechanics Inc. 756 wide angle biaxial bubble tilt sensor with a resolution of 1.0μ rad (0.2 arc second). A Kistler Corp. MEMS accelerometer of type Servo K-Beam 8330A2.5 with about 10⁻⁵m/s² resolution is used for the acceleration measurements. An Oceanographic Embedded Systems AD24 24 bit Sigma-Delta converter, which is controlled by a low-power Persistor Inc. embedded computer system of type CF 2, samples the data. The duration of tiltmeter operation is more than one year, which is controlled by the battery life. In our design the tiltmeter does not need active leveling devices, i.e., servo motors or other moving components to adjust sensors or frame. We designed the instrument for deployments by means of a remote operated vehicle. Since May 2005 the Bremen ocean bottom tiltmeter has recorded sea floor deformation and seismicity level in the Logatchev hydrothermal vent field, Mid-Atlantic Ridge. The tiltmeter is a part of the monitoring system of project ‘Logatchev Long-Term Environmental Monitoring,’ called LOLEM, of the German research program with the name ‘Schwerpunktprogramm 1144: Vom Mantel zum Ozean.’  相似文献   

Nondestructive density determination on marine sediment cores from gamma-ray attenuation measurements     

Sebastian Gerland  Heinrich Villinger 《Geo-Marine Letters》1995,15(2):111-118

We describe an improved nondestructive technique for density measurement based on gamma-ray absorption that permits construction of high-resolution density profiles of marine sediment cores. The system is capable of resolving vertical density variations with a spatial resolution of 4 mm and absolute accuracy of ± 1%. Comparison with conventional density determination on samples confirms the absolute accuracy. In addition to standard vertical profiling, a core rotation option is included to measure density as a function of rotation angle. This allows the quantification of the variability of density within a layer and detection of inhomogenities like icerafted debris or biogenic structures.  相似文献   

Physical time and astronomical “time”     

Heinrich Eichhorn 《Celestial Mechanics and Dynamical Astronomy》1987,43(1-4):237-241

This sketch is based on the following line of thought. If we understand by (physical or dynamical) time the independent variable in the equations of motion, only quantities which are in a strictly linear relationship with this mechanical — physical time should properly be called time. This excludes therefore such concepts as e.g., sidereal time; in general that Earth Rotation Parameter which is one of the angles which define the orientation in space of a coordinate system fixed in a rigid model Earth. The relationships between these Eulerian angles and the ERP which follow from the theory of motion are discussed, also for the case that the reference system is an arbitrary noninertial system whose relationship (as a function of time) with an inertial system is known.  相似文献   

Inertial systems-definitions and realizations     

Heinrich Eichhorn 《Celestial Mechanics and Dynamical Astronomy》1984,34(1-4):11-18

A frame of reference is defined asinertial if the coordinates of bodies, predicted with respect to it on the basis of some mechanical principles, agree with those actually observed. It is pointed out that within the framework of Newtonian mechanics the concept of an inertial frame of reference is global, but within the framework of general relativity only local. The relativistic local inertial frame of the Solar System moves with respect to the Newtonian global frame by the amount of geodetic precession. In all rigor, the concept of a globally privileged inertial system has been rendered meaningless by general relativity, even though the concept of an inertial reference frame remains useful in contemporary celestial mechanics. It is further pointed out that none of the practically determined approximations to an inertial frame of reference (e.g., the dynamical reference frame of celestial mechanics, the FK5) must be regarded as adefinition of an inertial system itself.  相似文献   

The first dinosaur tracksite from Xinjiang, NW China （Middle Jurassic Sanjianfang Formation, Turpan Basin） a preliminary report   总被引：1，自引：0，他引：1  

Oliver WINGS  Rico SCHELLHORN  Heinrich MALLISON  Ben THUY 《东北亚地学研究》2007,10(2):113-129

A new dinosaur tracksite was discovered in a steeply inclined sandstone layer of the Middle Jurassic Sanjianfang Formation in the Shanshan area of the Turpan Basin. The site is the first record of dinosaur footprints from Xinjiang Province in northwestern China. More than 150 tridactyl theropod dinosaur footprints are preserved as positive hyporeliefs on the lower bedding plane of a fine-grained sandstone body. Most of the footprints are isolated and appear to be randomly distributed. Some show well defined phalangeal pads, heels and rarely indistinct impressions of the distal part of the metatarsus. Two distinct morphotypes are present: a larger type with relatively broad pads shows similarities to Changpeipus and Megalosauripus, and a slightly smaller, slender and gracile type which is similar to Grallator, Eubrontes and Anchisauripus. In both morphotypes, digit III is the longest with a length between 11.4 and 33.6 cm. A single imprint shows prominent scratches, probably formed during slipping of the track maker.  相似文献   

Eight-hundred years of summer temperature variations in the southeast of the Iberian Peninsula reconstructed from tree rings     

Isabel Dorado Liñán  Eduardo Zorita  Jesús Fidel González-Rouco  Ingo Heinrich  Filipe Campello  Elena Muntán  Laia Andreu-Hayles  Emilia Gutiérrez 《Climate Dynamics》2015,44(1-2):75-93

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Li-bearing, disordered Mg-rich tourmaline from a pegmatite-marble contact in the Austroalpine basement units (Styria, Austria)     

Andreas Ertl  Heinrich Mali  Ralf Schuster  Wilfried Körner  John M. Hughes  Franz Brandstätter  Ekkehart Tillmanns 《Mineralogy and Petrology》2010,99(1-2):89-104

Pale-blue to pale-green tourmalines from the contact zone of Permian pegmatites to mica schists and marbles from different localities of the Austroalpine basement units (Rappold Complex) in Styria, Austria, are characterized. All these Mg-rich tourmalines have small but significant Li contents, up to 0.29 wt% Li₂O, and can be characterized as dravite, with FeO contents of ?~?0.9–2.7 wt%. Their chemical composition varies from ^X (Na_0.67Ca_0.19?K_0.02?_0.12) ^Y (Mg_1.26Al_0.97Fe²⁺ _0.36Li_0.19Ti⁴⁺ _0.06Zn_0.01?_0.15) ^Z (Al_5.31?Mg_0.69) (BO₃)₃ Si₆O₁₈ ^V (OH)₃? ^W [F_0.66(OH)_0.34], with a?=?15.9220(3), c?=?7.1732(2) Å to ^X (Na_0.67Ca_0.24?K_0.02?_0.07) ^Y (Mg_1.83Al_0.88Fe²⁺ _0.20Li_0.08Zn_0.01Ti⁴⁺ _0.01?_0.09) ^Z (Al_5.25?Mg_0.75) (BO₃)₃ Si₆O₁₈ ^V (OH)₃? ^W [F_0.87(OH)_0.13], with a?=?15.9354(4), c?=?7.1934(4) Å, and they show a significant Al-Mg disorder between the Y and the Z sites (R1?=?0.013–0.015). There is a positive correlation between the Ca content and?<?Y-O?>?distance for all investigated tourmalines (r?≈?1.00), which may reflect short-range order configurations including Ca and Fe²⁺, Mg, and Li. The tourmalines have X_Mg (X_Mg?=?Mg/Mg?+?Fe_total) values in the range 0.84–0.95. The REE patterns show more or less pronounced negative Eu and positive Yb anomalies. In comparison to tourmalines from highly-evolved pegmatites, the tourmaline samples from the border zone of the pegmatites of the Rappold Complex contain relatively low amounts of total REE (~8–36 ppm) and Th (0.1–1.8 ppm) and have low La_N/Yb_N ratios. There is a positive correlation (r?≈?0.91) between MgO of the tourmalines and the MgO contents of the surrounding mica schists. We conclude that the pegmatites formed by anatectic melting of mica schists and paragneisses in Permian time. The tourmalines crystallized from the pegmatitic melt, influenced by the metacarbonate and metapelitic host rocks.  相似文献