Dr. rer. nat. Sabrina Hempel
Department: Dep. Sensors ans Modelling
Program areas
Research areas
- Lead of the research group "Barn climate and emission modeling"
- Measure meteorological parameters and pollutant gas concentration in and around livestock buildings (particularly in naturally ventilated barns)
- Charakterize and model the transport of climate and environmentally harmful gases in and from livestock buildings
- (Semi-)mechanistc modelling of flow and transport processes (computational fluid dynamics)
- Empirical modeling of emission dynamics and microclimate (statistics and data science)
- Animal-friendly and sustainable livestock husbandry
- Emission mitigation in livestock husbandry
- Adaptation of naturally ventilated barns to climate change
Scientific activities
- Member national WG "Barn climate"
- Member of the expert group IVC Housing and Management systems (https://www.vera-verification.eu/) 2015-2021
- Member of the “Leibniz mentoring alumnae network”
- Member of the "Leibniz PostDoc notwork", particularly involvement in WG Career Development
- Member of the ATB internal advisory panel “DFG proposal"
- Member of KTBL working group "Evaluation of husbandry systems with regard to emissions"
- Member WG "emission reduction", network focus animal welfare (animal welfare competence center pig)
Projects
- ET4D – Development of a practical data management system with embedded sensors for improved environmental management and transparency of dairy farming Ziel des Projekts ist es, ein bestehendes, relativ kostengünstiges System zur Überwachung des Stall…
- BeLuVa 2.0 – Bestimmung der Luftwechselrate an freibelüfteten Ställen - Validierung von Prognosemodellen Die mathematische Modellierung im Projekt BeLuVa (2018-2021) lieferte erste Erkenntnisse, wie Randbedingungen die Luftwechselrate (LWR) in einzel…
- BeLuVa – Bestimmung der Luftwechselrate an freibelüfteten Ställen - Validierung von Prognosemodellen Die Luftwechselrate frei gelüfteter Ställe ist eine wichtige Planungs- und Einflussgröße für Tierwohl und eine Grundlage zur Bewertung der Umweltwirk…
- LivAGE – Ammonia and Greenhouse Gases Emissions from Animal Production Buildings Nach Angaben der FAO muss die weltweite Nahrungsmittelproduktion innerhalb der nächsten 20 Jahre um 50% steigen, während 80% dieses Anstiegs aus der Intensivierung der l…
- OptiBarn – Optimierte tierspezifische Stallklimatisierung vor dem Hintergrund des Temperaturanstiegs und der erhöhten Klimavariabilität. OptiBarn entwickelt regionale, nachhaltige Anpassungsstrategien für die Milchviehhaltung. Der Schwerpunkt liegt a…
Publications
- Janke, D.; Willink, D.; Ammon, C.; Doumbia, E.; Römer, A.; Amon, B.; Amon, T.; Hempel, S. (2022): Verification analysis of volume flow measured by a direct method and by two indirect CO2 balance methods. Applied Sciences. (10): p. 5203. Online: https://doi.org/10.3390/app12105203
- Hempel, S.; Ouatahar, L.; Janke, D.; Doumbia, E.; Willink, D.; Amon, B.; Bannink, A.; Amon, T. (2022): Ammonia emission prediction for dairy cattle housing from reaction kinetic modeling to the barn scale. Computers and Electronics in Agriculture. (August): p. 107168. Online: https://doi.org/10.1016/j.compag.2022.107168
- Hempel, S.; Janke, D.; Losand, B.; Zeyer, K.; Zähner, M.; Mohn, J.; Amon, T.; Schrade, S. (2022): Comparison of methane emission patterns from dairy housings with solid and slatted floors at two locations. Agronomy. (2): p. 381. Online: https://doi.org/10.3390/agronomy12020381
- Doumbia, E.; Janke, D.; Yi, Q.; Prinz, A.; Amon, T.; Kriegel, M.; Hempel, S. (2021): A Parametric Model for Local Air Exchange Rate of Naturally Ventilated Barns. Agronomy. (8): p. 1585. Online: https://doi.org/10.3390/agronomy11081585
- Doumbia, E.; Janke, D.; Yi, Q.; Amon, T.; Kriegel, M.; Hempel, S. (2021): CFD modelling of an animal occupied zone using an anisotropic porous medium model with velocity depended resistance parameters. Computers and Electronics in Agriculture. (February 2021): p. 105950. Online: https://doi.org/10.1016/j.compag.2020.105950
- Doumbia, E.; Janke, D.; Yi, Q.; Zhang, G.; Amon, T.; Kriegel, M.; Hempel, S. (2021): On finding the right sampling lines height through a parametric study of gas dispersion in a NVB. Applied Sciences. (8): p. 4560. Online: https://doi.org/10.3390/app11104560
- Janke, D.; Swaminathan, S.; Hempel, S.; Kasper, R.; Amon, T. (2021): Particulate matter dispersion modeling in agricultural applications: investigation of a transient open source solver. Agronomy. (11): p. 2246. Online: https://doi.org/10.3390/agronomy11112246
- Janke, D.; Willink, D.; Ammon, C.; Hempel, S.; Schrade, S.; Demeyer, P.; Hartung, E.; Amon, B.; Ogink, N.; Amon, T. (2020): Calculation of ventilation rates and ammonia emissions: Comparison of sampling strategies for a naturally ventilated dairy barn. Biosystems Engineering. (October 2020): p. 15-30. Online: https://doi.org/10.1016/j.biosystemseng.2020.07.011
- Janke, D.; Yi, Q.; Thormann, L.; Hempel, S.; Amon, B.; Nosek, S.; van Overbeke, P.; Amon, T. (2020): Direct measurements of the volume flow rate and emissions in a large naturally ventilated building. Sensors. (21): p. 6223. Online: https://doi.org/10.3390/s20216223
- Yi, Q.; Zhang, G.; Li, H.; Wang, X.; Janke, D.; Amon, B.; Hempel, S.; Amon, T. (2020): Estimation of opening discharge coefficient of naturally ventilated dairy buildings by response surface methodology. Computers and Electronics in Agriculture. (Februar 2020): p. 105224. Online: https://doi.org/10.1016/j.compag.2020.105224
Veröffentlichungen vor ATB-Zugehörigkeit
Hempel, S.; Frieler, K.; Warszawski, L.; Schewe, J.; Piontek, F. (2013): A trend-preserving bias correction-the ISI-MIP approach. Earth System Dynamics (4): p. 219-236
Winck, F. V.; Arvidsson, S.; Riaño-Pachón, D. M.; Hempel, S.; Koseska, A.; Nikoloski, Z.; Gomez, D. A. U.; Rupprecht, J.; Mueller-Roeber, B. (2013): Genome-wide identification of regulatory elements and reconstruction of gene regulatory networks of the green alga Chlamydomonas reinhardtii under carbon deprivation. PLoS One (8): p. e79909
Hempel, S.; Koseska, A.; Nikoloski, Z. (2013) Data-driven reconstruction of directed networks. The European Physical Journal B (86): p. 250
Hempel, S. (2012): Deciphering gene regulation from time series data. "Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I", dissertation
Hempel, S.; Koseska, A.; Nikoloski, Z.; Kurths, J. (2011): Unraveling gene regulatory networks from time-resolved gene expression data--a measures comparison study. BMC bioinformatics (12): p. 292
Hempel, S.; Koseska, A.; Kurths, J.; Nikoloski, Z. (2011): Inner composition alignment for inferring directed networks from short time series. Physical review letters (107): p. 054101
Curriculum Vitae
PROFESSIONAL BACKGROUND
since 2020
Leader of the reasearch group "barn climate an emission modeling", Department “Engineering for Livestock Management”, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Germany
since 2018
Leader of the BeLuVa project (funded by German Research Foundation – DFG), Department “Engineering for Livestock Management”, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Germany
since 2015
Deputy Head of the Department “Engineering for Livestock Management”, Leibniz Institute for Agricultural Engineering and Bioeconomy, Germany
2014 - 2017
Leader and Coordinator of the OptiBarn project (funded by German Federal Ministry of Food and Agriculture – BMEL – in the framework of FACCE ERANET+), Department “Engineering for Livestock Management”, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Germany
since 2013
Research Scientist, Department “Engineering for Livestock Management”, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Germany
2012 - 2013
Scientific programmer and member of the coordination group of the ISI-MIP project (funded by German Ministry of Education and Research – BMBF), Department “Climate Impacts and Vulnerabilities”, Potsdam Institute for Climate Impact Research (PIK), Germany
2009 - 2011
Research assistant, Interdisciplinary Center for Dynamics of Complex Systems (DYCOS), University of Potsdam, Germany
2006 - 2008
Student assistant, Interdisciplinary Center for Dynamics of Complex Systems (DYCOS), University of Potsdam, Germany
EDUCATION
2012
PhD - Thesis topic: Deciphering gene regulation from time series data; Faculty of Math and Natural Sciences, Department of Physics / Theoretical Physics, Humboldt University Berlin, Germany; Supervisor: Prof. Dr. Dr. h.c. mult. Jürgen Kurths
2009
University Diploma - Thesis topic: Numeric methods for detecting saddle-type objects - a comparative analysis and application to global circulation model data; Faculty of Math and Natural Sciences, Department of Physics / Nonlinear Dynamics, University of Potsdam, Germany