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Footprints in homogeneously and heterogeneously driven boundary layers derived from a Langrangian stochastic particle model embedded into large-eddy simulation

Title data

Steinfeld, Gerald ; Raasch, Siegfried ; Markkanen, Tiina:
Footprints in homogeneously and heterogeneously driven boundary layers derived from a Langrangian stochastic particle model embedded into large-eddy simulation.
In: Boundary-Layer Meteorology. Vol. 129 (November 2008) Issue 2 . - pp. 225-248.
ISSN 1573-1472
DOI: https://doi.org/10.1007/s10546-008-9317-7

Abstract in another language

A Lagrangian stochastic (LS) model, which is embedded into a parallelised large-eddy simulation (LES) model, is used for dispersion and footprint evaluations. For the first time an online coupling between LES and LS models is applied. The new model reproduces concentration patterns, which were obtained in prior studies, provided that subgrid-scale turbulence is included in the LS model. Comparisons with prior studies show that the model evaluates footprints successfully. Streamwise dispersion leads to footprint maxima that are situated less far upstream than previously reported. Negative flux footprints are detected in the convective boundary layer (CBL). The wide range of applicability of the model is shown by applying it under neutral and stable stratification. It is pointed out that the turning of the wind direction with height leads to a considerable dependency of source areas on height. First results of an application to a heterogeneously heated CBL are presented, which emphasize that footprints are severely affected by the inhomogeneity.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER64895
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professorship Micrometeorology - Univ.-Prof. Dr. Thomas Foken
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 31 Aug 2015 05:50
Last Modified: 31 Aug 2015 05:50
URI: https://eref.uni-bayreuth.de/id/eprint/18852