Systematic errors of mapping functions which are based on the VMF1 concept   总被引：1，自引：0，他引：1  

Florian Zus  Galina Dick  Jan Dousa  Jens Wickert 《GPS Solutions》2015,19(2):277-286

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Abstracts     

A. K. Dupree  J.-C. Henoux  Pavel Ambož  E. A. Gussmann  Galina. Y. Vassilyeva 《Solar physics》1967,2(4):502-504

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Simulation of primary phase relations and mineral compositions in the Partridge River intrusion,Duluth Complex,Minnesota: implications for the parent magma composition     

Christopher I. Chalokwu  Norman K. Grant  Alexei A. Ariskin  Galina S. Barmina 《Contributions to Mineralogy and Petrology》1993,114(4):539-549

In order to describe the composition and crystallinity of the initial (parental) magma of the Partridge River intrusion of the Keweenawan Duluth Complex, and thereby understand the mode of emplacement and solidification of the intrusion, we have applied a numerical simulation technique called geochemical thermometry (Frenkel et al. 1988). The parental magma was a low-alumina, high-Ti-P olivine tholeiite similar to typical Keweenawan low-alumina, high-Ti-P basalts associated with the Duluth Complex and from the nearby Portage Lake area of the Lake Superior region. The parental magma was emplaced as a crystal-liquid suspension, followed by chilling of an evolved, leading edge ferrodioritic liquid in the basal zone of the intrusion. The conditions of emplacement at the present crustal location were 1,150°C, 2 kbar, and f _{O 2} slightly above the wustite-magnetite (WM) buffer. The main differentiation process after emplacement was the sorting and redistribution of plagioclase and olivine crystals on a local scale accompanied by less efficient convection and minor settling of olivine. Calculated crystallization sequence for the parental magma is olivine+plagioclase (1,240°C)olivine+plagioclase+magnetite (1,146°C, WM+0.5)olivine+plagioclase+magnetite+augite (1,140°C, WM+0.5). The calculated compositions of the cumulus olivine and plagioclase in equilibrium with the parent magma at 1,150°C are Fo_66.7±1.1 and An_64.5±2.5, respectively, and are similar to the estimated average composition of primary olivine (Fo_69.1±2.8) and the average composition of plagioclase core (An_66.3±2.8) measured in drill core samples through the intrusion (Chalokwu and Grant 1987).  相似文献   

Contributions of nitrogen deposition and forest regrowth to terrestrial carbon uptake     

Galina Churkina  Kristina Trusilova  Mona Vetter  Frank Dentener 《Carbon balance and management》2007,2(1):5-7

Background  

The amount of reactive nitrogen deposited on land has doubled globally and become at least five-times higher in Europe, Eastern United States, and South East Asia since 1860 mostly because of increases in fertilizer production and fossil fuel burning. Because vegetation growth in the Northern Hemisphere is typically nitrogen-limited, increased nitrogen deposition could have an attenuating effect on rising atmospheric CO₂ by stimulating the vegetation productivity and accumulation of carbon in biomass.  相似文献   

Effect of temperature on contents of essential highly unsaturated fatty acids in freshwater zooplankton     

Michail I. Gladyshev  Vitaliy P. Semenchenko  Olga P. Dubovskaya  Elena B. Fefilova  Olesia N. Makhutova  Zhanna F. Buseva  Nadezhda N. Sushchik  Vladimir I. Razlutskij  Ekaterina V. Lepskaya  Mariya A. Baturina  Galina S. Kalachova  Olga N. Kononova 《Limnologica》2011,41(4):339-347

In 11 lakes from cold and warm regions we studied the content of highly unsaturated fatty acids (HUFA) in seston (<130 μm) and crustacean zooplankton using gas chromatography–mass spectrometry. An increase of temperature correlated with a decrease of HUFA content in zooplankton. A multivariate canonical correlation analyses revealed, that the decrease of HUFA content was related with a decrease of per cent of copepods in zooplankton communities, which are known to have higher HUFA levels in their biomass, than cladocerans. This means that temperature primarily affected the HUFA levels indirectly, via changing of taxonomic structure of zooplankton community, while the homeoviscous adaptation of zooplankton individuals had comparatively lower importance. As found, water temperature was better predictor of HUFA contents of zooplankton, than the fatty acid composition of seston. Thus, it can be predicted, that a probable climate warming will decrease the content of the essential HUFA in freshwater zooplankton with possible negative consequences for animals of higher trophic levels.  相似文献   

Regional development and regional planning in the countries of the Third World     

Galina V. Sdasuk 《Geoforum》1976,7(3):193-201

Acceleration of socio-economic progress and the achievement of self-reliant economy by the developing countries are closely linked with transformation of sectoral and spatial structure of colonial type economy, which is characterized by nonintegration, extreme inequalities in resources and land utilization, and regional disparities in the levels of socio-economic development. The State plays the leading role in this process through elaboration and realization of long-term regional policy and regional planning, the necessity of which is admitted in the majority of the developing countries. Their scientific substantiation is connected with investigation of objective process of formation of the spatial structure of the new type economy. The latter is formed in the process of interaction of the major regionalization systems: natural-resources, demography-ethnic, socio-economic (systems of special sector-wise and integral-complex regions are embedded in these systems). The systems of socio-economic regionalization are the most dynamic and manageable. But the modern stage of the development of the Third World countries is characterized by the essential changes of other regionalization systems as well. Evaluation of disproportional correlations in their interaction and elaboration of measures to reduce them constistute one of the most important objects of modern geography. Specialization of economic regions in the productions, which have favourable regional combinations of resources results in acceleration of economic growth because of the benefits of spatial division of labour. At the same time regional specialization and increase of inter-regional linkages strengthens the integration on all-national scale, which is of vital importance for the developing countries. The acute, not only economic but also socio-political problem of rapid backward areas advancement can and must be solved not separately (although such attempts have been undertaken often enough) but as a part of the general strategy of regional development. Scientific substantiation of the effective regional planning in the developing countries is an object of interdisciplinary research, where geographers are called to play the leading role.  相似文献   

Signature of long supercycles in the Pleistocene history of Asian limnic systems     

Mikhail Albertovich Phedorin  Andrey P. Fedotov  Svetlana S. Vorobieva  Galina A. Ziborova 《Journal of Paleolimnology》2008,40(1):445-452

The analysis of sediment chemistry and biota in drill cores from Lake Khubsugul in Mongolia (KDP-01) and Lake Baikal in Siberia (BDP-96/1), two great Eurasian freshwater lakes, detected prominent climate and biological events at 460–420 and 670 kyrs BP in addition to the orbital cycles of precession, tilt and eccentricity. The revealed long-term events were associated with notable changes in biodiversity and geography/landscapes, mainly in water budgets and weathering patterns. The span between 460–420 and 670 kyrs BP was the time when the climate and geographic conditions differed from those before and after these events. The corresponding 33–24 m (670–460 kyr) interval of the Khubsugul core lacked the usual signature of the Milankovitch glacial/interglacial cycles. Events of approximately these ages were found in some other continental ecosystems and in oceanic δ¹³C records. The two events may mark the phases of a 300–500-kyr long supercycle (or megastadial) in the evolution of continental ecosystems. Among other causes (e.g., regional tectonic events), this periodicity, being globally correlated, may be associated with the 400-kyr cycle of the Earth’s orbital eccentricity.  相似文献   

Geological relationship between Anyui Metamorphic Complex and Samarka terrane,Far East Russia     

Satoru Kojima  Kazuhiro Tsukada  Shigeru Otoh  Satoshi Yamakita  Masayuki Ehiro  Cheikhna Dia  Galina Leontievna Kirillova  Vladimir Akimovich Dymovich  Lyudmila Petrovna Eichwald 《Island Arc》2008,17(4):502-516

The Anyui Metamorphic Complex (AMC) of Cretaceous age is composed of metachert, schist, gneiss, migmatite and ultramafic rocks, and forms a dome structure within the northernmost part of the Jurassic accretionary complex of the Samarka terrane. The two adjacent geological units are bounded by a fault, but the gradual changes of grain size and crystallinity index of quartz in chert and metachert of the Samarka terrane and the AMC, together with the gradual lithological change, indicate that at least parts of the AMC are metamorphic equivalents of the Samarka rocks. Radiolarian fossils from siliceous mudstone of the Samarka terrane indicates Tithonian age (uppermost Jurassic), and hence, form a slightly later accretion. This signifies that the accretionary complex in the study area is one of the youngest tectonostratigraphic units of the Samarka terrane. The relationship between the Samarka terrane and AMC, as well as their ages and lithologies, are similar to those of the Tamba–Mino–Ashio terrane and Ryoke Metamorphic Complex in southwest Japan. In both areas the lower (younger) part of the Jurassic accretionary complexes were intruded and metamorphosed by Late Cretaceous granitic magma. Crustal development of the Pacific‐type orogen has been achieved by the cycle of: (i) accretion of oceanic materials and turbidites derived from the continent; and (ii) granitic intrusion by the next subduction and accretion events, accompanied by formation of high T/P metamorphic complexes.  相似文献   

Detection of Microbiological Content in Water as Indicator of Its Ecological State − Mini‐Review          下载免费PDF全文

Natalya Vasilievna Besarab  Galina Ivanovna Novik 《洁净——土壤、空气、水》2016,44(12):1614-1620

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