搜索结果: 1-15 共查到“理学 Soils”相关记录194条 . 查询时间(0.14 秒)
Chasing carbon from trees to soils（图）
树木 土壤 碳追踪
2023/5/22
“Tuck your pants into your socks – the ticks can be really bad out here,” graduate student Dave Frey tells the group of four students as they embark from their cars.
Patterns in permafrost soils could help climate change models（图）
Patterns permafrost soils climate change models
2020/6/19
The Arctic covers about 20% of the planet. But almost everything hydrologists know about the carbon-rich soils blanketing its permafrost comes from very few measurements taken just feet from Alaska's ...
Clues found on how soils may respond to climate change（图）
how soils respond climate change
2019/10/22
Rock core samples from a period of warming millions of years ago indicate that soils contributed to a rapid rise in atmospheric greenhouse gases and suggest that modern climate models may overestimate...
Determination of organic carbon in soils and sediments in an automatic method
Automatic digestion Soils Sediments Organic carbon
2018/3/23
Our automatic digestion device is applied in determining the quantity of organic carbon in the soils/sediments. Its operation process is simple. The reaction conditions are optimized; the complex pret...
Trace elements mobility in soils from the hydrothermal area of Nisyros (Greece)
volatile elements fumarolic gases volcanoes
2015/8/18
Nisyros Island, Greece, is a stratovolcano known for its intense hydrothermal activity. On June 2013, during a multidisciplinary field campaign, soil samples were collected in the caldera area to dete...
Empirical relationships of shear wave velocity,SPT-N value and vertical effective stress for different soils in Mashhad,Iran
Shear wave velocity Vertical effective stress Standard penetration test Downhole test, Empirical relations Mashhad Iran
2015/8/14
Shear wave velocity, Vs, is one of the important input parameters in seismic response analysis of the ground. Various methods have been examined to measure the soil Vs directly. Direct measurement of ...
Long-term effect of diet amended by risk elements contaminated soils on risk element penetration and physiological parameters of rats
risk elements soil soil ingestion
2015/7/2
The long-term accumulation of risk elements (As, Cd, Pb) originated from differently contaminated soils in rat organism was investigated during a model two-generation experiment. The effect of soil co...
Modelling non-linear ground response of non-liquefable soils
ground response site amplification soil plasticity soil-structure interaction
2015/7/1
A nonlinear nite element (FE) model is presented to account for soil column e!ects on strong ground motion. A three-dimensional bounding surface plasticity model with a vanishing elastic region, appro...
Vertebrate herbivore-induced changes in plants and soils: linkages to ecosystem functioning in a semi-arid steppe
grazing intensity N mineralization plant community soil fauna trophic groups
2015/2/4
Large grazing herbivores have been reported to determine the structure and function of grassland ecosystems. However, the ecological linkages between structure and functioning components have yet been...
MERCURY DISTRIBUTION IN SOILS AND STREAM SEDIMENTS OF CENTRAL INDIANA, USA
Mercury Soil Sediment Emissions
2015/1/16
An investigation of mercury (Hg) in soils and stream sediments was conducted to understand the impact of urbanization on Hg deposition and accumulation on the upper west fork of the White River waters...
Polycyclic aromatic hydrocarbons in post-fire soils of drained peatlands in western Meshchera (Moscow region, Russia)
Polycyclic aromatic hydrocarbons contaminants wildfires levels of pollution polycyclic aromatic hydrocarbons in the soil
2015/1/6
Polycyclic aromatic hydrocarbons (PAHs) are priority pollutants that arrive in the environment from numerous anthropogenic and natural sources, but the data on their natural sources including wildfire...
Use of phytoremediation and biochar to remediate heavy metal polluted soils: a review
phytoremediation biochar remediate heavy metal polluted soils a review
2015/1/6
Anthropogenic activities are resulting in an increase of the use and extraction of heavy metals. Heavy metals cannot be degraded and hence accumulate in the environment, having the potential to contam...
Thermal shock and splash effects on burned gypseous soils from the Ebro Basin (NE Spain)
Thermal shock splash effects gypseous soils the Ebro Basin
2015/1/6
Fire is a natural factor of landscape evolution in Mediterranean ecosystems. The middle Ebro Valley has extreme aridity, which results in a low plant cover and high soil erodibility, especially on gyp...
Microbial biomass and basal respiration of selected Sub-Antarctic and Antarctic soils in the areas of some Russian polar stations
Antarctica where soil biological ecological survey soil Antarctica landscape soil investigation
2015/1/6
Antarctica is a unique place for soil, biological, and ecological investigations. Soils of Antarctica have been studied intensively during the last century, when different national Antarctic expeditio...
Permafrost-affected soils and their carbon pools with a focus on the Russian Arctic
Soil organic matter, swimming pool, the quaternary period, the climate system, cryosphere, arctic climate
2015/1/6
Permafrost-affected soils have accumulated enormous pools of organic matter during the Quaternary period. The area occupied by these soils amounts to more than 8.6 million km2, which is about 27% of a...