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Article
Arbuscular mycorrhizas are present on Spitsbergen
A previous study of 76 plant species on Spitsbergen in the High Arctic concluded that structures resembling arbuscular mycorrhizas were absent from roots. Here, we report a survey examining the roots of 13 gra...
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Article
Cross-Spectra Over the Sea from Observations and Mesoscale Modelling
Cospectra and quadrature spectra are calculated for six pairs of tall offshore measurement masts near the Horns Rev I wind farm in the Danish North Sea and the Nysted wind farm in the Baltic sea. The mast-pair...
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Chapter and Conference Paper
Upward Fluxes of Particles over Forests: When, Where, Why?
A substantial number of particle fluxes over forest are upwards. Analyses of data from a beech forest in Denmark indicate these “apparent emission” fluxes are frequently statistically different from zero flux ...
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Article
Identifying the European Fossil Fuel Plumes in the Atmosphere Over the Northeast Atlantic Region Through Isotopic Observations and Numerical Modelling
As part of the Danish NEAREX project the origin and variability of anthropogenic atmospheric CO2 over the Northeast Atlantic Region (NEAR) has been studied. The project consisted of a combination of experimental ...
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Article
Pesticides and heavy metals in Danish streambed sediment
The role of streambed sediment as a sink for pesticides and heavy metals was investigated in 30 Danish lowland streams. The investigated streams drain catchments varying in hydrology, topography, soil type and...
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Chapter and Conference Paper
Pesticides and heavy metals in Danish streambed sediment
The role of streambed sediment as a sink for pesticides and heavy metals was investigated in 30 Danish lowland streams. The investigated streams drain catchments varying in hydrology, topography, soil type and...
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Article
Aspects Of The Atmospheric Surface Layers On Mars And Earth
The structures of mean flow and turbulence in the atmospheric surface boundary layer have been extensively studied on Earth, and to a far less extent on Mars, where only the Viking missions and the Pathfinder ...
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Chapter and Conference Paper
The Role of Surface Waves in Modulating Momentum, Heat and Chemical Flux
Numerous air-sea interaction studies during recent years have attempted to study the effect of swell on the exchange of momentum at the surface. In studies over the open ocean (e.g. Donelan et al., 1997 and Drenn...
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Chapter
Fluxes in the Marine Atmospheric Boundary Layer
The work performed within the framework of ASE subproject has been aimed mainly on the following subjects.
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Article
Bank erosion in a Danish lowland stream system
This paper deals with quantification of bank erosion in an entire lowland stream system and its contribution to suspended sediment export from the stream basin. Bank erosion was measured at 33 stream reaches o...
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Chapter
Bank erosion in a Danish lowland stream system
This paper deals with quantification of bank erosion in an entire lowland stream system and its contribution to suspended sediment export from the stream basin. Bank erosion was measured at 33 stream reaches o...
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Article
Abstracts of the 6th FECS Conference 1998 Lectures
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Article
On the Determination of the Neutral Drag Coefficient in the Convective Boundary Layer
Based on the idea that free convection can be considered as a particular case of forced convection, where the gusts driven by the large-scale eddies are scaled with the Deardorff convective velocity scale, a n...
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Article
The effect of brown trout (Salmo Trutta L.) on stream invertebrate drift, with special reference to Gammarus pulex L.
The effect of brown trout (Salmo trutta L.) on invertebrate drift density was examined in three previously fish-free springbrooks. Drift density was studied during the day following the sequential introduction of...
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Chapter
Modelling Dry Deposition of Particles to the Ocean
The general problem of transfer between the atmosphere and the ocean is quite difficult: a host of physical processes play a role. For instance, the limiting layer of molecular diffusion can be on the liquid s...
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Article
Response of neutral boundary layers to changes of roughness
When air blows across a change in surface roughness, an internal boundary layer (IBL) develops within which the wind adapts to the new surface. This process is well described for short fetches, > 1 km. However...
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Chapter
A Model for Accidental Releases in Complex Terrain
An operational hazard assessment technique has been developed to investigate impacts of high concentrations from pollutants emitted in complex terrain. In such environments, atmospheric dispersion is influence...
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Article
Inertial-dissipation methods and turbulent fluxes at the air-ocean interface
The use of high frequency atmospheric turbulence properties (inertial subrange spectra, structure function parameters or dissipation rates) to infer surface fluxes of momentum, sensible heat and latent heat is...
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Chapter
Dispersion Conditions Over Land and Water in a Coastal Zone Revealed by Measurements at Two Meteorological Masts
In connection with a nuclear site evaluation program two meteorological masts have been operated for 3 years, one placed directly on a shoreline, the other 1 km inland. Substantial differences in the distribut...
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Article
Modelling velocity spectra in the lower part of the planetary boundary layer
Principles used when constructing models for velocity spectra are reviewed. Based upon data from the Kansas and Minnesota experiments, simple spectral models are set up for all velocity components in stable ai...
