About usThe work of Janicke Consulting concentrates on problems concerning the atmospheric dispersion of air pollutants, radionuclides, bioaerosols, and odorants. Our main activities center in the development of such mathematical models and their implementation into computer programs. We can rely on more than 30 years of experience in this field.

Fields of work

Air pollutants

Air pollutants which are emitted for example by industrial plants or motor vehicles are of potential danger to man and environment. For an assessment of these dangers it is important to understand how air pollutants disperse in the atmosphere and to predict the concentrations of air pollutants in the surrounding of such sources.

Radionuclides, bioaerosols and odorants

For radionuclides, an estimate of the cloud radiation (gamma submersion) is required in addition to the atmospheric dispersion. For the dispersion of bioaerosols like germs or pollen, special release conditions and physical effects must be considered. Odorants are typically assessed by means of their degree of annoyance. In contrast to air pollutants, it is not the mean concentration which matters but the excess frequency of concentration with respect to the human threshold for odor perception.

Dispersion models

An estimate of the substance concentration can be obtained by means of a mathematical dispersion model which describes the atmospheric transport of trace substances in a simplified manner. Because of its complexity, such a model can be handled generally only in form of a computer program.

Research and development projects

Our main activities center in the development of such mathematical models and their implementation into computer programs. We can rely on more than 30 years of experience in this field. Beside these activities, we carry out research projects, for example:

Aircraft emissions
Calculation of the emission from aircraft traffic.
Ultrafine particles
Dispersion and transformation of ultrafine particles in the atmosphere.
TA Luft
Enhancement of methodical foundations for the German regulation on air quality control.
Nuclear hazards
Development of a decision support system for nuclear hazards.
Plume rise
Three-dimensional plume rise model for dry and wet plumes.
Washout by rain
Estimate of the washout of gases from pollutant plumes by rain.
Pollen transport
Modelling the transport and deposition of pollen under realistic release conditions.

Committee work

KRdL in VDI and DIN
ICAO/CAEP

In the Commission on Air Pollution Prevention (KRdL) in VDI and DIN, we contribute to the development and revision of guidelines on air pollution control. On behalf of the Federal Environment Agency, we maintain the programs AUSTAL, BESMIN, and BESMAX which are applied in the context of the German regulation on air quality control (TA Luft). On behalf of the Federal Ministry of Transport, we contribute to modeling and development of air quality standards and measures within the CAEP (Committee on Air Pollution and Environmental Protection) of the International Civil Aviation Organization (ICAO).

Projects

Janicke Consulting is or has been involved in the following projects (selection):

OLGA EU Horizon2020 project OLGA: Holistic green airports, grant number 101036871 (subcontractor).
KOPILOT DE UBA research project KOPILOT: Design and pilot phase of a health study on ultrafine particles, project number 3721612020 (subcontractor).
ULTRAFLEB DE UBA research project ULTRAFLEB: Impact of major airports on the temporal and spatial distributions of ultrafine particles smaller than 100 nm in the greater Berlin area, project number 3720522010 (subcontractor).
AVIATOR EU Horizon2020 project AVIATOR: Assessing aviation emission impact on local air quality at airports: towards regulation, grant number 814801 (partner).
RAPTOR EU Horizon2020 project RAPTOR: Research of aviation PM technologies, modelling and regulation, grant number 863969 (partner).
AUSTAL DE UBA research project AUSTAL: Further development of selected methodological principles for determining chimney heights and calculating pollutant dispersion in accordance with TA Luft, project number 7144320400 (contractor).
VDI standards VDI standards VDI 3945 Part 3 (Lagrangian particle model), VDI 3945 Part 1 (Gaussian puff model), VDI 3782 Part 1 (Gaussian plume model), VDI 3783 Part 8 (boundary layer model), VDI 3782 Part 5 (deposition parameters), VDI 4251 Part 3 (bioaerosols), VDI 3788 Part 2 (odor backwards calculation), VDI 3783 Part 15.1 (minimum distance estimate).

Models developed

Janicke Consulting is the developer of the models LASAT, AUSTAL, BESMIN, BESMAX, LASPORT, SECTOR, PLURIS, LASAIR.

LASAT
AUSTAL
austal.de(opens in a new window)
BESMIN
austal.de(opens in a new window)
BESMAX
austal.de(opens in a new window)
LASPORT
SECTOR
PLURIS
LASAIR

Clients

We provide our expert knowledge and models to experts who professionally assess the effects of air pollutants, like state agencies, TÜVs (associations for technical inspection), consultants, engineering and industrial companies, and airports. We give advise in the usage and application of these models and carry out on request the dispersion calculations. We usually do not prepare formal expertises in order not to enter into competition with our clients.

Selected publications

UFP
Winkler, U., Merkel, M., Weinhold, K., Wiedensohler, A., Bretschneider, L., Gerling, L., Harm-Altstädter, B., Lampert, A., Pätzold, F., Schlerf, A., Voss, A., Weber, S., Held, A., Manders-Groot, A., Bohte, Q., Schaap, M., Janicke, U., Pfäfflin, F., Mahlau, A., Latt, Ch., Diegmann, V., Aust, S.:Einfluss der Großflughäfen auf zeitliche und räumliche Verteilungen von Ultrafeinstaub kleiner als 100 nm im Großraum Berlin (ULTRAFLEB).UBA-Texte 35/2026, ISSN 1862-4804, 2026. www.umweltbundesamt.de/publikationen
NO/NO2
Janicke, U.: Application of effective conversion rates between NO and NO2 in a standard airport dispersion model system. Atmosphere 15/574, 431-447, 2025. doi.org/10.3390/atmos15050574
NO/NO2, PM
Janicke, U., Wolke, R., Gatzsche, K., Tilgner, A., Lorentz, H., Düring, A.: Chemische Umwandlungen in der anlagenbezogenen Ausbreitungsrechnung nach TA Luft. UBA-Texte 162/2024, ISSN 1862-4804, 2024. www.umweltbundesamt.de/publikationen
TA Luft
Janicke, L., Janicke, U., Bächlin, W., Theurer, W.: Weiterentwicklung ausgewählter methodischer Grundlagen der Schornsteinhöhenbestimmung und der Ausbreitungsrechnung nach TA Luft. UBA-Texte 144/2023, ISSN 1862-4804, 2023. www.umweltbundesamt.de/publikationen
UFP
Owen, B., Anet, J. G., Bertier, N., Christie, S., Cremaschi, M., Dellaert, S., Edebeli, J., Janicke, U., Kuenen, J., Lim, L., Terrenoire, E.: Review: Particulate matter emissions from aircraft. Atmosphere 13(8), 1230, 2022. doi.org/10.3390/atmos13081230
TA Luft
Janicke, U.: Entwicklung der Ausbreitungsmodellierung in der KRdL im Wechselspiel von VDI-Richtlinien und TA Luft. Gefahrenstoffe 77, 290-293, 2017.
Pollen
Hofmann, F., Ober, F., Janicke, L., Janicke, U., Kuhn, U., Schlechtriemen, U., Unselt, C., Wittich, K.-P.: Eintrag von Maispflanzenteilen in die Umwelt; Abschätzung der Umweltexposition für die Risikobewertung transgener Pflanzen. BfN-Skripten 353, 2013.
Particle model
Janicke, L.: Lagrangian dispersion modelling. Particulate Matter in and from Agriculture 235, 37-41, 2002.
Plume rise
Janicke, U., Janicke, L.: A three-dimensional plume rise model for dry and wet plumes. Atmospheric Environment 35, 877-890, 2001. doi.org/10.1016/S1352-2310(00)00372-1
Particle model
Janicke, L.: Particle simulation of dust transport and deposition and comparison with conventional models. Air Pollution Modeling and its Application IV (ed. de Wispelaere), 759-769, 1985. Plenum Press, New York
Particle model
Janicke, L.: Particle simulation of inhomogeneous turbulent diffusion. Air Pollution Modeling and its Application II (ed. Weber), 527-535, 1983. Plenum Press, New York

Contact

Ingenieurbüro Janicke GbR
Hermann-Hoch-Weg 1
88662 Überlingen
Germany

E-Mail: info@janicke.de
Tel: +49 (0) 7551 947 1818
Fax: +49 (0) 7551 947 1819

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