搜索结果: 1-15 共查到“地球科学总论 ammonia”相关记录15条 . 查询时间(0.062 秒)
Modeling atmospheric ammonia and ammonium using a stochastic Lagrangian air quality model (STILT-Chem v0.7)
Modeling atmospheric ammonia ammonium stochastic Lagrangian air quality model
2014/12/16
A new chemistry module that simulates atmospheric ammonia (NH3) and ammonium (NH+4) was incorporated into a backward-in-time stochastic Lagrangian air quality model (STILT-Chem) that was originally de...
Field inter-comparison of eleven atmospheric ammonia measurement techniques
Field inter-comparison eleven atmospheric ammonia measurement techniques
2010/2/8
Eleven instruments for the measurement of ambient concentrations of atmospheric ammonia gas (NH3), based on eight different measurement methods were inter-compared above an intensively managed agricul...
Impact of seawater pCO2 on calcification and Mg/Ca and Sr/Ca ratios in benthic foraminifera calcite: results from culturing experiments with Ammonia tepida
seawater pCO2 calcification and Mg/Ca and Sr/Ca ratios benthic foraminifera calcite culturing experiments Ammonia tepida
2010/1/21
Evidence of increasing concentrations of dissolved carbon dioxide, especially in the surface ocean and its associated impacts on calcifying organisms, is accumulating. Among these organisms, benthic a...
"Processes controlling the exchange of ammonia between grassland and the atmosphere (GRAMINAE) – results from the Braunschweig field experiment"
ammonia grassland and the atmosphere the Braunschweig field experiment
2010/1/21
"Processes controlling the exchange of ammonia between grassland and the atmosphere (GRAMINAE) – results from the Braunschweig field experiment".
Dynamics of ammonia exchange with cut grassland: synthesis of results and conclusions of the GRAMINAE Integrated Experiment
ammonia exchange cut grassland the GRAMINAE Integrated Experiment
2010/1/21
Improved data on biosphere-atmosphere exchange are fundamental to understanding the production and fate of ammonia (NH3) in the atmosphere. The GRAMINAE Integrated Experiment combined novel measuremen...
Physiological controls on seawater uptake and calcification in the benthic foraminifer Ammonia tepida
Physiological controls seawater uptake calcification benthic foraminifer Ammonia tepida
2010/1/21
To analyze the relation between seawater uptake and calcification, we incubated juveniles of the benthic foraminifer Ammonia tepida with various fluorescent probes and visualised them afterwards with ...
Inter-comparison of ammonia fluxes obtained using the Relaxed Eddy Accumulation technique
Inter-comparison ammonia fluxes Relaxed Eddy Accumulation technique
2010/1/21
The exchange of Ammonia (NH3) between grassland and the atmosphere was determined using Relaxed Eddy Accumulation (REA) measurements. The use of REA is of special interest for NH3, since the determina...
Ammonia sources and sinks in an intensively managed grassland canopy
Ammonia sources sinks grassland canopy
2010/1/21
Grasslands represent canopies with a complex structure where sources and sinks of ammonia (NH3) may coexist at the plant level. Moreover, management practices such as mowing, hay production and grazin...
SURFATM-NH3:a model combining the surface energy balance and bi-directional exchanges of ammonia applied at the field scale
SURFATM-NH3 surface energy balance bi-directional exchanges ammonia field scale
2010/1/20
A new biophysical model SURFATM-NH3, simulating the ammonia (NH3) exchange between terrestrial ecosystems and the atmosphere is presented. SURFATM-NH3 consists of two coupled models: (i) an energy bud...
Ammonia fluxes in relation to cutting and fertilization of an intensively managed grassland derived from an inter-comparison of gradient measurements
Ammonia fluxes cutting fertilization grassland inter-comparison gradient measurements
2010/1/20
Quantification of ammonia (NH3) land-atmosphere exchange is required for atmospheric modelling and assessment of nitrogen deposition, yet flux measurement methods remain highly uncertain. To address t...
Dynamics of ammonia exchange with cut grassland:strategy and implementation of the GRAMINAE Integrated Experiment
Dynamics ammonia exchange cut grassland strategy implementation GRAMINAE Integrated Experiment
2010/1/19
A major international experiment on ammonia (NH3) biosphere-atmosphere exchange was conducted over intensively managed grassland at Braunschweig, Germany. The experimental strategy was developed to al...
Temporal variability in bioassays of the stomatal ammonia compensation point in relation to plant and soil nitrogen parameters in intensively managed grassland
Temporal variability stomatal ammonia compensation point plant and soil nitrogen parameters
2010/1/19
The exchange of ammonia between crop canopies and the atmosphere depends on a range of plant parameters and climatic conditions. However, little is known about effects of management factors. We have h...
Modelling the dynamic chemical interactions of atmospheric ammonia with leaf surface wetness in a managed grassland canopy
dynamic chemical interactions atmospheric ammonia leaf surface wetness grassland canopy
2010/1/19
Ammonia exchange fluxes between grassland and the atmosphere were modelled on the basis of stomatal compensation points and leaf surface chemistry, and compared with measured fluxes during the GRAMINA...
Contribution of different grass species to plant-atmosphere ammonia exchange in intensively managed grassland
Contribution grass species plant-atmosphere ammonia exchange grassland
2010/1/19
Species diversity in grasslands usually declines with increasing input of nitrogen from fertilizers or atmospheric deposition. Conversely, species diversity may also impact the build-up of soil and pl...
Vertical structure and diurnal variability of ammonia exchange potential within an intensively managed grass canopy
Vertical structure diurnal variability ammonia exchange grass canopy
2010/1/19
Stomatal ammonia compensation points (χs) of grass species on a mixed fertilized grassland were determined by measurements of apoplastic [NH4+] and [H>+] in the field. Calculated χs values were compar...