188 research outputs found
(Table 5) Heavy metal contents and geochemical characteristics in Cretaceous volcanoclastic rocks from DSDP Hole 61-462A
No full text(Table 5) Heavy metal contents and geochemical characteristics in Cretaceous volcanoclastic rocks from DSDP Hole 61-462
(Table 4) Chemical composition of Cretaceous volcanoclastic rocks from DSDP Hole 61-462A
No full text(Table 4) Chemical composition of Cretaceous volcanoclastic rocks from DSDP Hole 61-462
Projecting urban heat island effect on the spatial-temporal variation of microbial respiration in urban soils of Moscow megalopolis
No full textUrbanization coincides with remarkable environmental changes including vegetation, soil and climate. An urban heat island is a well-known urban mesoclimatic anomaly, however its effect on functions of urban soils considering their spatial-temporal variability remain overlooked. The research aimed to explain the urban heat island effect on soil microbial respiration by linking meso-climatic CCLM and TERRA_URB models and the digital soil mapping approach for the case of Moscow megalopolis. Moscow megalopolis is the biggest city in Russia, which experiences on-going urbanization within the New Moscow project. As a result, a clear urbanization gradient was observed in land-use structure, climate and soil properties. For the study period (May–October 2019), the increase in average monthly temperature of urban soils compared to rural reached 1.7 and 2.0 °C in June and September with the maximal values obtained in the city center. The significant effect of soil temperature, carbon content and pH on soil microbial (basal) respiration was estimated based on the lab experiment with a representative sample of urban topsoils (n = 140). The resulting equation was integrated with the mesoclimatic data in two ways: i) considering urban heat islands (based on the modelled 500 m grid soil temperature maps) and ii) non-considering urban heat islands (based on the average monthly rural soil temperature). Comparison of the results showed that urban heat island increased microbial respiration by 5–10% on average and up to 25% in the most affected locations. The additional amount of CO which could be potentially emitted by soil microbes as a result of the urban heat island in Moscow megapolis was on average 0.2 Mg C ha (0–10 cm layer; 1.1 g cm bulk density). Small scale green zones in the city center (public gardens, residential court yards and green lawns along the roads) where high soil C contents coincided with the maximal urban heat island effect were the hotspots of microbial respiration. Although the estimated absolute values could be rather uncertain, the research highlights the vulnerability of urban topsoil C stocks to mineralization intensified by mesoclimatic anomalies. 2 −1 −
Numerical simulation of particle transport in the urban boundary layer with implications for SARS-CoV-2 virion distribution
No full textThis paper presents a description, verification, and application of a model simulating the transport of aerosol particles with different properties in the urban boundary layer by using a Lagrangian approach. The model takes input fields of air flow characteristics from arbitrary external models or analytical solutions and allows estimating the movement, sedimentation, and decay of particles. In this paper, the accuracy of the model is successfully estimated on the basis of exact analytical solutions. Simulations are made for a series of urban canyons under different conditions of stratification and wind speed to assess the effects of these meteorological parameters on particle transport in urban areas. Under similar conditions, the transport of particles simulating SARS-CoV-2 coronavirus particles is calculated
Proposal of an RF-only double-funnel system for ions extraction from a cryogenic stopping cell for the Super-FRS at FAIR
No full text(Table 13) Chemical composition of Late Cretaceous deposits from DSDP Hole 45-396
No full textContents in air-dried matter
(Table 15) Contents of foraminiferal remains, CaCO3, and mineral insoluble residue in size fractions of Late Cenozoic sediments from DSDP Hole 45-396
No full text(Table 15) Contents of foraminiferal remains, CaCO3, and mineral insoluble residue in size fractions of Late Cenozoic sediments from DSDP Hole 45-39
(Table 8) Contents of foraminifera fragments, CaCO3, and mineral insoluble residue in different grain size fractions of Late Cenozoic sediments from DSDP Hole 45-395
No full text(Table 8) Contents of foraminifera fragments, CaCO3, and mineral insoluble residue in different grain size fractions of Late Cenozoic sediments from DSDP Hole 45-39
Chemical composition of sediments from DSDP Legs 45 and 71
No full textResults of mineralogical and geochemical investigations of post-Middle Jurassic deposits of the Atlantic Ocean are based on materials of the Deep Sea Drilling Project. Comparative characteristics of primary matter for ''black shales'' are given. Exhalative origin of heavy metal accumulation in near-axial sedimentary deeps of the Mid-Atlantic Ridge (23°N) are shown. History of post-Middle Jurassic sedimentation is considered on the base of clay mineral-, clastic component-, trace and rare- chemical element studies
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