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PD Dr. Stefan Siebert


Telefon: +49 (0)228 73 2881
Fax: +49 (0)228 73 2870
Office: 2.004

Research profile

Crop management is a major determinant of crop yields and crop productivity. The interaction of different management factors among themselves and with physical suitability factors like climate and soil or socioeconomic conditions is challenging and poorly understood so far. My research is focused on the analysis of large scale data sets and the development of large-scale model components to assess the interaction between resource use, crop management, crop productivity and environment. This includes the generation and improvement of data sets required as models inputs. Other interests are crop modeling in general (crop phenology, drought and heat stress, crop yields), modeling of virtual water flows and the alteration of ecosystems by anthropogenic impacts. All my research is based on spatial data and therefore on the interface between agronomy and geography.

Stefan Siebert

Current projects

• GlobE - Improving food security in Africa through increased system productivity of biomass-based value webs (BiomassWeb)

Geospatial Open Source Hosting of Agriculture, Resource & Environmental Data (GEOSHARE)

Multiscale modeling of extreme events

Assessment of EUROpean AGRIculture WATer use and trade under climate change (EURO-AGRIWAT), COST-action ES1106

Development, update, and maintenance of the Digital Global Map of Irrigation Areas

Selected publications

Siebert, S., Kummu, M., Porkka, M., Döll, P., Ramankutty, N., Scanlon, B.R. (2015). A global data set of the extent of irrigated land from 1900 to 2005. Hydrology and Earth System Sciences 19, 1521-1545. DOI:10.5194/hess-19-1521-2015.

West, P.C.,  Gerber, J.S., Mueller, N.D., Brauman, K.A., Carlson, K.M., Cassidy, E.S., Engstrom, P.M., Johnston, M.,  MacDonald, G.K., Ray, D.K., Siebert, S. (2014). Leverage points for improving food security and the environment. Science 345, 325-328. DOI:10.1126/science.1246067.

Siebert, S., Ewert, F., Eyshi Rezaei, E., Kage, H., Graß, R. (2014). Impact of heat stress on crop yield—on the importance of considering canopy temperature. Environmental Research Letters 9(4), 044012. DOI:10.1088/1748-9326/9/4/044012.

Siebert, S., Ewert, F. (2012). Spatio-temporal patterns of phenological development in Germany in relation to temperature and day length. Agricultural and Forest Meteorology 152(1), 44-57, DOI:10.1016/j.agrformet.2011.08.007.

Foley, J.A., Ramankutty, N., Brauman, K.A., Cassidy, E.S., Gerber, J.S., Johnston, M., Mueller, N.D., O’Connell, C., Ray, D.K., West, P.C., Balze, C., Bennett, E.M., Carpenter, S.R., Hill, J., Monfreda, C., Polasky, S., Rockström, J. Sheehan, J., Siebert, S., Tilman, D., Zaks, D.P.M. (2011). Solutions for a cultivated planet. Nature 478, 337-342, DOI:10.1038/nature10452.



• MSc Ecological conditions and climate change
• MSc Natural resource use and management in plant production
• MSc Crop and ecosystem analysis and modelling
• MSc Crop and ecosystem analysis and modelling - data processing and visualization
• MSc Crop ecology
• BSc Anbau, Ertragsbildung und Ertragsfaktoren landwirtschaftlicher und gärtnerischer Kulturpflanzen
• BSc Grundlagen der Pflanzenproduktion II


For a more complete listing of my publications and research activities, please visit my personal website: