The chromospheric flare effect in atmospherics (IGY 1957)     

Ladislav Křivský  Blažena Råžičková 《Studia Geophysica et Geodaetica》1959,3(2):154-164

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50th Birthday of professor a Zátopek     

Jiři Vaněk 《Studia Geophysica et Geodaetica》1957,1(1):196-196

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Some physical and chemical properties of lakes in north-eastern Norway     

Anders Bøyum 《Aquatic Sciences - Research Across Boundaries》1970,32(1):300-327

Summary Chemical and physical properties in 12 lakes in the north-easternmost part of Norway are studied. Geologically the lakes are situated on the pre-cambrian “Baltic shield”, with metamorphic and intrusive rocks that are not easily soluble. Vertical series of temperature, pH, O₂ and x₁₈ together with colour measurements and transparency indicate that the lakes are temperate and fundamentally oligotrophic, some with a dystrophic character. Some individual differences are discussed, with special reference to the surroundings, flow-through rate and morphometry. In accordance with the geology of the area the amount of electrolytes is small. Major ions (Ca, Mg, Na, K, HCO₃, SO₄ and Cl) are analysed. The greatest differences in the composition of these ions in the lakes are shown to be due mainly to the varying proximity to the sea and to geological differences. Rain is shown to be the most important factor in supplying major ions toat least some of the lakes. Individual variations are discussed, and comparisons are made with the ionic composition of water in other districts.

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Zusammenfassung An 12 im n?rdlichesten Teil von Norwegen, auf dem pr?kambrischen Baltischen Schild gelegenen Seen werden die chemischen und physikalischen Eigenschaften studiert. Das Einzugsgebiet besteht aus schwerl?slichem, metamorphem und intrusivem Gestein. Die vertikale Verteilung von Temperatur, pH, O₂ und x₁₈ samt Farbmessungen und Transparenz zeigt, dass die Seen dem temperierten Typus angeh?ren und im wesentlichen oligotroph sind, einige von dystrophem Charakter. Einige individuelle Unterschiede werden er?rtert mit besonderer Berücksichtigung der Umgebung, der Durchflutungszeit und der Morphometrie. In übereinstimmung mit der geologischen Beschaffenheit der Umgebung ist der Elektrolytgehalt neigdrig. Die dominierenden Ionen (Ca, Mg, Na, K, HCO₃, SO₄ und Cl) werden analysiert. Es wird nachgewiesen, dass die gr?ssten Unterschiede in der Zusammensetzung dieser Ionen in den Seen auf die verschiedene Entfernung vom Meer und auf geologische Unterschiede zurückzuführen sind. Für einige der Seen wird nachgewiesen, dass der Regen als wichtigster Faktor für ihre Versorgung mit Ionen anzusehen ist. Es werden individuelle Unterschiede er?rtert und Vergleiche mit der ionalen Zusammensetzung von Gew?ssern anderer Gegenden gezogen.

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Analysis of some aromatic hydrocarbons in a benzene-soluble bitumen from Green River shale     

D.E. Anders  F.G. Doolittle  W.E. Robinson 《Geochimica et cosmochimica acta》1973,37(5):1213-1228

The hydrocarbon content of an aromatic fraction, isolated from the bitumen of Green River shale, was studied by mass spectrometry, infra-red spectrometry, gas chromatography and a dehydrogenation technique. The hydrocarbon types and their distribution in this aromatic fraction, as determined by mass spectrometry, include the following: C_nH_2n?6(10%), C_nH_{2n?8 (31 %)}, C_nH_2n?10(18%), C_nH_2n?12(12%), C_nH_2n?14(8%) and a series of alkenylbenzenes (20%). The carbon-number range, empirical formulae and quantity of each compound in the major types are reported. Mass spectra of several compounds and homologous mixtures of compounds isolated from the aromatic fraction are also given.  相似文献   

Noble gases in eleven H-chondrites     

E. Ganapathy  Edward Anders 《Geochimica et cosmochimica acta》1973,37(2):359-362

He, Ne, Ar and Xe were measured in aliquots of 11 H-chondrites, to complement trace element studies on the same meteorites (Laulet al., 1972). Bielokrynitschie, Charsonville, Pultusk and Supuhee have lost radiogenic gases before cosmic-ray exposure and Doroninsk, during exposure.  相似文献   

Aluminum-26 in meteorites—VII. Ureilites,their unique radiation history     

Laurel L Wilking  Gerald F Herman  Edward Anders 《Geochimica et cosmochimica acta》1973,37(7):1803-1810

Cosmogenic ²⁶A1 activities have been measured by γ-γ coincidence counting in the three ureilites which had not previously been studied. The values in dpm/kg are: Dingo Pup Donga, 38.4 ± 2.4; North Haig, 39.3 ± 4.8; Dyalpur, 55.8 ± 4.8. Five of the six known ureilites thus have lower ²⁶A1 contents, 63 per cent to 77 per cent, than the calculated saturation values, in marked contrast to most other stony meteorites. This cannot be attributed to short cosmic ray exposure ages. Nor do size and depth effects account for the narrow range of ²⁶A1 activities, because a nuclear particle track study indicates that preatmospheric radii were highly variable, from ≥ 40 cm for Goalpara to only a few cm for Dingo Pup Donga. By default, the most likely explanation is that the ureilites had much smaller or much larger orbits than all other stony meteorites.  相似文献   

Foreword     

Edward Anders  Arden L. Albee 《Geochimica et cosmochimica acta》1973,37(4):719

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A two-stage time series model for monthly hydrological projections under climate change in the Lim River basin (southeast Europe)     

Milan Stojković  Jasna Plavšić  Stevan Prohaska  Dragutin Pavlović  Jovan Despotović 《水文科学杂志》2020,65(3):387-400

ABSTRACT

Climate change projections of precipitation and temperature suggest that Serbia could be one of the most affected regions in southeastern Europe. To prepare adaptation measures, the impact of climate changes on water resources needs to be assessed. Pilot research is carried out for the Lim River basin, in southeastern Europe, to predict monthly flows under different climate scenarios. For estimation of future water availability, an alternative approach of developing a deterministic-stochastic time series model is chosen. The proposed two-stage time series model consists of several components: trend, long-term periodicity, seasonality and the stochastic component. The latter is based on a transfer function model with two input variables, precipitation and temperature, as climatic drivers. The Nash-Sutcliffe model efficiency for the observed period 1950–2012 is 0.829. The model is applied for the long-term hydrological prediction under the representative concentration pathway (RCP) emissions scenarios for the future time frame 2013–2070.  相似文献   

Meteorite stranding surfaces and the Greenland icesheet     

Ralph P. Harvey  Anders Meibom  Henning Haack 《Meteoritics & planetary science》2001,36(6):807-816

Abstract— Thirty years of recoveries in East Antarctica have led to significant understanding of the regional characteristics associated with meteorite stranding surfaces. In Antarctica these sites are characterized by patches of snow‐free blue ice at high altitude on the icesheet in regions where iceflow is highly restricted. Melting is extremely rare or absent and sublimation rates are high, even though meteorite stranding surfaces are predominantly found within regions where accumulation typically dominates. Localized environmental conditions that persist for thousands of years or longer appear to be the dominant factor rather than shorter‐term or seasonal cycles. In this paper we describe our discovery of regions in Northeast Greenland with blue ice areas that exhibit many of the requisite characteristics, suggesting that they are excellent prospects for future meteorite recovery efforts.  相似文献   

Book reviews     

Wolf Tietze  Gerhard Kortum  W. R. Mead  T. K. Poiker  C. Paddick  George Kish  A. Njøs  H. Mensching  V. Haarmann  Uzo M. Igbozurike  M. M. Yoshino  Mushtaqur Rahman  Lage Wahlström  J. Connell  Kazimierz Dziewonski  Wayland R. Swain  J. Humlum  G. W. Lüttig  Haruko Kishimoto  Mai Britt E. Mørk 《GeoJournal》1982,6(3):270-280

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