Orbital elements of Minor Planets     

M. Scardia  D. Ghiringhelli  H. Debehogne 《Astronomische Nachrichten》1996,317(1):43-48

Orbital elements of the numbered minor planets 4209 - Briggs, 5177 - Hugowolf and preliminary orbital elements of the unnumbered minor planets 1988 RL4, 1989 CE8 and 1989 DJ are given.  相似文献   

Nouvelle Determination des Elements Orbitaux de L'etoile Double Visuelle ADS 7203–σ2 UMA     

M. Scardia 《Astronomische Nachrichten》1980,301(2):95-98

Eine Gesamtheit von 168 Beobachtungen wird benutzt, um die Bahnelemente des Doppelsternes ADS 7203 – σ₂ UMa nach der Methode von KOWALSKY zu bestimmen. Die vorläufigen Elemente, die auf diese Art und Weise erhalten wurden, wurden mit der Differenzen-Korrektionsmethode von HELLERICH verbessert und die Gesamtmasse des Systems und die dynamishe Parallaxe mit der Methode von BAIZE -ROMANI errechnet.  相似文献   

Orbites Provisoires des Etoiles Doubles Visuelles ADS 102 et ADS 281     

M. Scardia 《Astronomische Nachrichten》1980,301(5):233-240

The orbital elements of the visual binary stars ADS 102 und ADS 281 are given. The provisional elements obtained by KOWALSKY method have been corrected with the diffeerential method of HELLERICH . At last, the dynamical parallaxes and total masses of the systems have been calculated.  相似文献   

Eléments Orbitaux,Presque Definitifs,de l'Etoile Double Visuelle ADS 10075 - SFT 2052     

M. Scardia 《Astronomische Nachrichten》1984,305(3):127-134

Orbital elements of the visual binary star ADS 10075 are given. The dynamical parallax and total mass of the system have been calculated.  相似文献   

Nouvelle Determination des Elements Orbitaux de L'Etoile Double Visuelle ADS 9979 – σ CRB Osservatorio Astronomico di Brera Avec 1 figure (Reçu le 10 avril 1979)     

M. Scardia 《Astronomische Nachrichten》1979,300(6):307-311

The orbital elements of the binary star ADS 9979 – σCRB were determined with the method of KOWALSKY , by the use of 886 observations. These provisional elements were then corrected with the differential method of HELLERICH . At last the total mass of the system was calculated and the dynamical parallax was obtained with the method of BAIZE –ROMANI .  相似文献   

Microstructures associated with static and dynamic recrystallization of Carrara marble (Alpi Apuane,NW Tuscany,Italy)   总被引：2，自引：0，他引：2  

Molli  Giancarlo  Heilbronner  Renée 《Geologie en Mijnbouw》1999,78(1):119-126

The present contribution summarizes the first results of a study focusing on microstructures from Alpi Apuane marbles. Its aim is both an analysis of the evolution of the metamorphic complex recorded in marbles and the supply of basic material for process-oriented studies on calcite microstructures due to natural deformation. Quantitative analysis of the variations of statically recrystallized microstructures suggest a relationship with the peak metamorphic temperatures. Previously unrecognized post-thermal peak shear zones, showing overprint microstructures typical of grain-boundary migration and dynamic recrystallization, are described; they document the natural deformation of Carrara marble.  相似文献   

Marine phytoplankton size–frequency distributions: Spatial patterns and decoding mechanisms     

Letizia Sabetta  Alberto Basset  Giancarlo Spezie 《Estuarine, Coastal and Shelf Science》2008

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Understanding hydrological processes in glacierized catchments: Evidence and implications of highly variable isotopic and electrical conductivity data     

Giulia Zuecco  Luca Carturan  Fabrizio De Blasi  Roberto Seppi  Thomas Zanoner  Daniele Penna  Marco Borga  Alberto Carton  Giancarlo Dalla Fontana 《水文研究》2019,33(5):816-832

The spatial and temporal characterization of geochemical tracers over Alpine glacierized catchments is particularly difficult, but fundamental to quantify groundwater, glacier melt, and rain water contribution to stream runoff. In this study, we analysed the spatial and temporal variability of δ²H and electrical conductivity (EC) in various water sources during three ablation seasons in an 8.4‐km² glacierized catchment in the Italian Alps, in relation to snow cover and hydro‐meteorological conditions. Variations in the daily streamflow range due to melt‐induced runoff events were controlled by maximum daily air temperature and snow covered area in the catchment. Maximum daily streamflow decreased with increasing snow cover, and a threshold relation was found between maximum daily temperature and daily streamflow range. During melt‐induced runoff events, stream water EC decreased due to the contribution of glacier melt water to stream runoff. In this catchment, EC could be used to distinguish the contribution of subglacial flow (identified as an end member, enriched in EC) from glacier melt water to stream runoff, whereas spring water in the study area could not be considered as an end member. The isotopic composition of snow, glacier ice, and melt water was not significantly correlated with the sampling point elevation, and the spatial variability was more likely affected by postdepositional processes. The high spatial and temporal variability in the tracer signature of the end members (subglacial flow, rain water, glacier melt water, and residual winter snow), together with small daily variability in stream water δ²H dynamics, are problematic for the quantification of the contribution of the identified end members to stream runoff, and call for further research, possibly integrated with other natural or artificial tracers.  相似文献   

Tectono-sedimentary evolution of the External Liguride units (Northern Apennines,Italy): insights in the pre-collisional history of a fossil ocean-continent transition zone     

Michele Marroni  Giancarlo Molli  Giuseppe Ottria  Luca Pandolfi 《Geodinamica Acta》2013,26(5):307-320

Abstract

In the Northern Apennines, the External Liguride (EL) units are interpreted as derived from the domain that joined the Ligure–Piemontese oceanic basin to the Adriatic plate continental margin. The EL units can be divided into two different groups according to the lithostratigraphic features of the basal complexes underlying the Upper Cretaceous–Lower Tertiary carbonate flysch (e.g. Helminthoid flysch). The first group includes the western successions characterized by Santonian–Campanian sedimentary melanges where slide blocks of lherzolitic mantle, gabbros, basalts, granulites, continental granitoids are represented. The second group is represented by the eastern successions where the Cenomanian–Campanian basal complexes mainly consist of sandstones and conglomerates where the mafic and ultramafic rocks are scarce or completely lacking. Their original substrate is represented by the Middle Triassic to Lower Cretaceous, mainly platform carbonate deposits, found as slices at the base of the eastern successions.

The stratigraphic features shown by the basal complexes allow the reconstruction of their source area that is assumed to be also representative for the pre-Upper Cretaceous setting. The proposed reconstruction suggests the occurrence in the EL domain of two distinct domains. The eastern domain was characterized by a thinned and faulted continental crust belonging to the Adriatic continental margin. The western domain was instead floored by subcontinental mantle associated with lower and upper continental crust, representing the ocean–continent transition. This setting is interpreted as the result of the opening of the Ligure–Piemontese oceanic basin by passive rifting, mainly developed by simple shear, asymmetric extension of the continental crust. © 2001 Éditions scientifiques et médicales Elsevier SAS  相似文献   

Current Behaviour and Dynamics of the Lowermost Italian Glacier (Montasio Occidentale,Julian Alps)     

Luca Carturan  Giovanni A. Baldassi  Aldino Bondesan  Simone Calligaro  Alberto Carton  Federico Cazorzi  Giancarlo Dalla Fontana  Roberto Francese  Alberto Guarnieri  Nicola Milan  Daniele Moro  Paolo Tarolli 《Geografiska Annaler: Series A, Physical Geography》2013,95(1):79-96

Smaller glaciers (<0.5 km²) react quickly to environmental changes and typically show a large scatter in their individual response. Accounting for these ice bodies is essential for assessing regional glacier change, given their high number and contribution to the total loss of glacier area in mountain regions. However, studying small glaciers using traditional techniques may be difficult or not feasible, and assessing their current activity and dynamics may be problematic. In this paper, we present an integrated approach for characterizing the current behaviour of a small, avalanche‐fed glacier at low altitude in the Italian Alps, combining geomorphological, geophysical and high‐resolution geodetic surveying with a terrestrial laser scanner. The glacier is still active and shows a detectable mass transfer from the accumulation area to the lower ablation area, which is covered by a thick debris mantle. The glacier owes its existence to the local topo‐climatic conditions, ensured by high rock walls which enhance accumulation by delivering avalanche snow and reduce ablation by providing topographic shading and regulating the debris budget of the glacier catchment. In the last several years the glacier has displayed peculiar behaviour compared with most glaciers of the European Alps, being close to equilibrium conditions in spite of warm ablation seasons. Proportionally small relative changes have also occurred since the Little Ice Age maximum. Compared with the majority of other Alpine glaciers, we infer for this glacier a lower sensitivity to air temperature and a higher sensitivity to precipitation, associated with important feedback from increasing debris cover during unfavourable periods.  相似文献