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Publications (19)
Simultaneous measurements of bioaerosol emissions and ambient air concentrations were performed according to VDI standards during three days at a forced air ventilated broiler house with 160 000 animals. Aim of the investigations was to compare measured ambient air concentrations and values calculated consistent with standard VDI 4251 part 3. At th...
The modelling of NO2 concentrations in street canyons often includes the parameterisation of the conversion of NO to NO2. Four different parameterisations (Romberg et al., Bächlin and Bösinger, Derwent and Middleton, Hertel and Berkowics) are tested for the prediction accuracy of annual averages. Data are taken from the years 1999 to 2014. The resu...
Road traffic is one of the main causes of poor air quality in European cities. The air pollution burden due to road traffic in a street canyon consists of shares from local traffic and contributions of vehicles driving elsewhere in the city as well as elsewhere on a larger scale. Are electric vehicles a solution for air quality problems in cities?...
Road traffic is one of the main causes of poor air quality in European cities. Electric vehicles (EV) are often presented as climate friendly and as a solution for air quality problems in cities. The aim of this study is to investigate how much of this claim is true and to find out the necessary shares of electric vehicles of different types needed...
Air pollution is bad for human health and an international problem which is far from being solved. A large portion of the total PM10 and NO2 burden at, e.g., a street canyon, comes from background concentration. To analyse the origin of these background concentrations, simulations for PM10, PM2.5, and NO2 have been performed with the chemical trans...
Nitrogen deposition plays a more and more important role in approval procedures, especially concerning adverse effects on ecosystems. Ammonia emissions from agriculture cause the lion's share of the nitrogen deposition. The deposition of ammonia depends on the vegetation type. It is for example higher in forests as compared to other locations. The...
For the last ten years impacts from nitrogen deposition within appropriate assessments has been a controversial issue discussed by many experts in Germany. More recently results from a R&D project funded by the Federal Highway Research Institute (BASt) have been published to establish a method on the assessment for road projects. Adverse effects ar...
Air quality within the European Union (EU) is controlled by the Member States' monitoring networks. In this study, measured data is compared with the EURAD (EURopean Air pollution Dispersion) model system diagnostic output. Simulations for the German state North Rhine-Westphalia (NRW) with a horizontal grid resolution of 5 km × 5 km are analyzed. T...
In spring 2010 the Icelandic volcano Eyjafjallajokull erupted high loads of pyroclastic material into the atmosphere. The eruption cloud reached heights between 4 and 7 km. The volcanic ash advisory centre London, the responsible institution for making forecasts of ash coming to Europe, decided the complete shut down of the air traffic over wide pa...
Reduction of total NOx-emissions is one of the major objectives of the current European legislative standards in particular with respect to road traffic. Air quality regulations as formulated in the air quality directive 2008/50/EC however are aiming on NO2 and not on total NOx (NO+NO2). With respect to NO2-concentrations two limit values have to b...
A pronounced episode of long range transport of Saharan dust occurred from May 27 to June 1 2008, Elevated PM(10) concentrations were observed as the particle cloud travelled from Southern France via parts of Italy, Switzerland and Austria to North-West Germany. The main transport of Saharan dust occurred aloft, leading to an uneven distribution of...
The development of a cyclonic vortex over a polynya is investigated with the primitive equation mesoscale model METRAS. The
impact of different atmospheric processes on vortex development is determined by calculating the terms of the vorticity tendency
equation. Sensitivity studies are performed for different large-scale situations (geostrophic win...
Die Wechselwirkungen zwischen Atmosphäre und Schnee sind für die Simulation der Grenzschicht (BL) über Schneedecken von Bedeutung. Um diese Wechselwirkungen zu untersuchen, wird das mesoskalige Lokalmodell (LM) des Deutschen Wetterdienstes (DWD) mit einer horizontalen Auflösung von etwa 14 km und einer hohen vertikalen Auflösung in der Grenzschicht...
The interactions between atmosphere and snowpack are important for modelling the boundary layer (BL) over snow surfaces. To study these interactions, the mesoscale local model (LM) of the German Meteorological Service is applied for simulations over Greenland at a horizontal resolution of about 14 km and a high vertical resolution of the BL. Since...
