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M. Mikolajewski C. Galan K. Gazeas P. Niarchos S. Zola M. Kurpinska-Winiarska M. Winiarski A. Majewska M. Siwak M. Drahus W. Waniak A. Pigulski G. Michalska Z. Kolaczkowski T. Tomov M. Gromadzki D. Graczyk J. Osiwala A. Majcher M. Hajduk M. Cikala A. Zajczyk D. Kolev D. Dimitrov E. Semkov B. Bilkina A. Dapergolas L. Bellas-Velidis B. Csak B. Gere P. Nemeth G. Apostolovska 《Astrophysics and Space Science》2005,296(1-4):445-449
We report multicolour photometric observations of the 2003 eclipse of the long-period (5.6 yr) eclipsing binary EE Cep. Measurements
were obtained with ten telescopes at eight observatories in four countries. In most cases, UBV(RI)C broad band filters have been used. The light curve shape shows that the obscuring body is an almost dark disk around a low-luminosity
central object. However, variations of the colour indices during the eclipse indicate that the obscuring body emits a considerable
amount of radiation in the near infrared. 相似文献
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Rosine Lallement Bertaux Jean-Loup Karöly Szegö Szilvia Nemeth 《Earth, Moon, and Planets》2002,90(1-4):67-76
For a few months around perihelion, thecentral part of the Hale–Bopp hydrogencloud has been optically thick to thesolar Lyα
radiation, and hassignificantly reduced the solar flux availablefor the resonance glow of interstellarhydrogen beyond the
comet. This shadowing effecton the interstellar gas is the first everobserved comet shadow. It is modeled andcompared with
SWAN observations. Shadowmodelling will help to constrain the cometwater production and radiative transfer effectsin the interstellar
ionisation cavity. 相似文献
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Gabriella Sch?ll-Barna Attila Demény Gábor Serlegi Szilvia Fábián Pál Sümegi István Fórizs Bernadett Bajnóczi 《Journal of Paleolimnology》2012,47(1):87-100
Geochemical records of bivalve shells have been increasingly studied in the last decade to obtain information on climate conditions.
In this paper we present stable isotope compositions of living and prehistoric shells of freshwater mussels (Unionidae) and
their relationships with climate conditions in a shallow lake environment of Lake Balaton, West-Central Hungary. Physical
conditions and stable oxygen isotope compositions of lake water samples were monitored where living bivalves were collected.
Comparisons between seasonal variations in ambient temperature, water composition and within-shell isotopic variations indicate
that the shells of Unio pictorum do reflect local changes at high resolution and thus can be used to study past conditions. Additionally, shells covering
the last two decades were gathered at several locations along the lake in order to determine spatial and temporal variations
in the shells’ isotopic compositions as a function of weather conditions. As an application, prehistoric shells collected
in archaeological excavations were analysed in order to study past environmental variations. Climate variations during the
Late Copper Age (5460–4870 cal. yr BP) have been assumed on the basis of geomorphological and archaeozoological observations
at the site Balatonkeresztúr-Réti-dűlő (south of Lake Balaton), that suggested increasing humidity as a cause of changes in
settlement location and domestic livestock husbandry. Stable carbon and oxygen isotope compositions of prehistoric bivalve
shells were analyzed from excavations representing five archaeological subphases (Boleráz subphase, 5460–5310 cal. yr BP;
two transitional subphases around 5310 cal. yr BP; Early Classic subphase, 5310–5060 cal. yr BP; Late Classic subphase, 5040–4870 cal.
yr BP). The analyses revealed significant negative C and O isotope shifts in the transitional subphases relative to the earlier
and later subphases. The isotopic variations indicate that the local climate became relatively wet and possibly cold around
5310 cal. yr BP, then it returned to drier (and likely warmer) conditions during the Classic subphases. This interpretation
is in agreement with previous studies on climate changes related to the “5.3 ky event” in the European continental area and
the North Atlantic Region, indicating an Atlantic influence in the Carpathian Basin. 相似文献
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Z. Bebesi N. Krupp K. Szego M. Fränz Z. Nemeth S.M. Krimigis D.G. Mitchell G. Erdos D.T. Young M.K. Dougherty 《Icarus》2012,218(2):1020-1027
We discuss the high energy electron absorption signatures at Titan during the Cassini dayside magnetospheric encounters. We use the electron measurements of the Low Energy Measurement System of the Magnetospheric Imaging Instrument. We also examine the mass loading boundary based on the ion data of the Ion Mass Spectrometer sensor of the Cassini Plasma Spectrometer. The dynamic motion of the Kronian magnetopause and the periodic charged particle flux and magnetic field variations – associated with the magnetodisk of Saturn – of the subcorotating magnetospheric plasma creates a unique and complex environment at Titan. Most of the analysed flybys (like T25–T33 and T35–T51) cluster at similar Saturn Local Time positions. However the instantaneous direction of the incoming magnetospheric particles may change significantly from flyby to flyby due to the very different magnetospheric field conditions which are found upstream of Titan within the sets of encounters.The energetic magnetospheric electrons gyrate along the magnetic field lines of Saturn, and at the same time bounce between the mirror points of the magnetosphere. This motion is combined with the drift of the magnetic field lines. When these flux tubes interact with the upper atmosphere of Titan, their content is depleted over approximately an electron bounce period. These depletion signatures are observed as sudden drop-outs of the electron fluxes. We examined the altitude distribution of these drop-outs and concluded that these mostly detected in the exo-ionosphere of Titan and sometimes within the ionosphere.However there is a relatively significant scatter in the orbit to orbit data, which can be attributed to the which can be attributed to the variability of the plasma environment and as a consequence, the induced magnetosphere of Titan. A weak trend between the incoming electron fluxes and the measured drop-out altitudes has also been observed. 相似文献
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David “Jim” Nemeth 《The Professional geographer》2013,65(4):583-586
Why is Ortley Beach, New Jersey, known as Superstorm Sandy's ground zero? This article employs qualitative vulnerability analysis to understand why vulnerability of second homes in Ortley Beach resulted in dune failure and slow rebuilding after Sandy. The second-home owners who largely make up the community in Ortley Beach are identified as the key vulnerable group. This group's lack of political representation and financial compensation after Sandy increased house damage and slowed rebuilding. Identifying the level of vulnerability of the majority group in a location is paramount to understanding how the community recovers from a disaster. Such identification can also aid in preparing communities, especially for types of disasters they have not yet encountered. 相似文献
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Ákos Malatinszky Szilvia Ádám Eszter Falusi Dénes Saláta Károly Penksza 《Climatic change》2013,118(3-4):671-682
Land managers of wetlands face various challenges emerging from climate change. Exploration of these problems is a prerequisite to developing adaptive management of vulnerable areas. Central and Eastern European countries are highly vulnerable to climate change. The Balaton Uplands National Park, an attractive tourist destination with natural values of high national and community importance, has suffered the greatest extremities in precipitation in Hungary during 2010 and 2011. After identification of stakeholder groups, private landowners and land managers as being most likely affected by climate change were interviewed in the national park. A compilation of the most important land use problems that already have influence on the management of protected wetlands was listed. Land managers connect several problems to weather extremities and long-term changes, but take practically no actions in favor of mitigation or adaptation, or strengthening resilience. As there is strong evidence that wet habitats are becoming more sensitive and vulnerable, land managers have to adapt their objectives, strategies and measures to changing climate and be involved in the process of adapting the management measures of protected areas, especially wetlands, to probable effects of climate change. 相似文献
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