MSc, PhD
Senior Scientist

University of Bonn
Institute of Crop Science and Resource Conservation (INRES)
Katzenburgweg 5
D 53115 Bonn
Germany
+49 228 73 3262 (phone)
+49 228 73 2870 (fax)

www.lap.uni-bonn.de
s.siebert@uni-bonn.de

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 development of large-scale model components to simulate the impact of specific management measures on crop productivity. This includes the generation and improvement of data sets required as models inputs.

Research

• modeling the impact of drought stress on crop production at the global scale
• modeling of crop phenology and crop yields
• modeling virtual water flows of green and blue water induced by trade of agricultural products
• modeling of nutrient balances in crop production
• development and improvement of the digital global map of irrigation areas (GMIA)
• describing the alteration of ecosystems by humans using the concept of anthropogenic biomes

Curriculum Vitae

Publications

JOURNAL ARTICLES

Döll, P., Hoffmann-Dobrev, H., Portmann, F.T., Siebert, S., Eicker, A., Rodell, M., Strassberg, G., Scanlon, B.R. (in press). Impact of water withdrawals from groundwater and surface water on continental water storage variations. Journal of Geodynamics, in press, DOI:10.1016/j.jog.2011.05.001.

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.

Neumann, K., Stehfest, E., Verburg, P., Siebert, S., Müller, C., Veldkamp, T. (2011). Exploring global irrigation patterns: A multilevel modelling approach. Agricultural Systems 104, 703-713, DOI:10.1016/j.agsy.2011.08.004.

Siebert, S., Burke, J., Faures, J. M., Frenken, K., Hoogeveen, J., Döll, P., Portmann, F. T. (2010). Groundwater use for irrigation – a global inventory. Hydrology and Earth System Sciences 14, 1863-1880, DOI:10.5194/hess-14-1863-2010.

Ellis, E. C., Klein Goldewijk, K., Siebert, S., Lightman, D., Ramankutty, N. (2010). Anthropogenic transformation of the biomes, 1700 to 2000. Global Ecology and Biogeography 19(5), 589-606, DOI:10.1111/j.1466-8238.2010.00540.x.

Siebert, S., Portmann, F. T., Döll, P. (2010). Global patterns of cropland use intensity. Remote Sensing 2(7), 1625-1643, DOI:10.3390/rs2071625.

Siebert, S., Döll, P. (2010). Quantifying blue and green virtual water contents in global crop production as well as potential production losses without irrigation. Journal of Hydrology 384(3-4), 198-217, DOI:10.1016/j.jhydrol.2009.07.031.

Portmann, F. T., Siebert, S., Döll, P. (2010). MIRCA2000-Global monthly irrigated and rainfed crop areas around the year 2000: A new high-resolution data set for agricultural and hydrological modeling. Global Biogeochemical Cycles 24, GB1011, DOI:10.1029/2008GB003435.

Moreau, M., Siebert, S., Buerkert, A., Schlecht, E. (2009). Use of a tri-axial accelerometer for automated recording and classification of goats' grazing behaviour. Applied Animal Behaviour Science 119(3-4), 158-170, DOI:10.1016/j.applanim.2009.04.008.

Luedeling, E., Siebert, S., Buerkert, A. (2007). Filling the voids in the SRTM Elevation Model - A TIN-based delta surface approach. ISPRS Journal of Photogrammetry and Remote Sensing 62(4), 283-294, DOI:10.1016/j.isprsjprs.2007.05.004.

Siebert, S., Nagieb, M., Buerkert, A. (2007). Climate and irrigation water use of a mountain oasis in northern Oman. Agricultural Water Management 89(1-2), 1-14, DOI:10.1016/j.agwat.2006.11.004.

Siebert, S., Döll, P., Hoogeveen, J., Faures, J-M., Frenken, K., Feick, S. (2005). Development and validation of the global map of irrigation areas. Hydrology and Earth System Sciences 9, 535-547, SRef-ID:1607-7938/hess/2005-9-535.

Van Drecht, G., Bouwman, A. F., Boyer, E. W., Green, P., Siebert, S. (2005). A comparison of global spatial distributions of nitrogen inputs for nonpoint sources and effects on river nitrogen export. Global Biogeochemical Cycles 19(4), GB4S06, DOI:10.1029/2005GB002454.

Buerkert, A., Nagieb, M., Siebert, S., Khan, I., Al-Maskri, A. (2005). Nutrient cycling and field-based partial nutrient balances in two mountain oases of Oman. Field Crops Research 94(2-3), 149-164, DOI:10.1016/j.fcr.2004.12.003.

Siebert, S., Häser, J., Nagieb, M., Korn, L., Buerkert, A. (2005). Agricultural, architectural and archaeological evidence for the role and ecological adaptation of a scattered mountain oasis in Oman. Journal of Arid Environments 62(1), 177-197, DOI:10.1016/j.jaridenv.2004.09.023.

Nagieb, M., Siebert, S., Luedeling, E., Buerkert, A., Häser, J. (2004). Settlement history of a mountain oasis in Northern Oman – evidence from land-use and archaeological studies. Die Erde 135, 81-106, ==> link to article.

Siebert, S., Gries, D., Zhang, X., Runge, M., Buerkert, A. (2004). Non-destructive dry matter estimation of Alhagi sparsifolia vegetation in a desert oasis of Northwest China. Journal of Vegetation Science 15(3), 365-372, ==> link to article, ==> link to journal.

Korn, L., Häser, J., Schreiber, J., Gangler, A., Nagieb, M., Siebert, S., Buerkert, A. (2004). Tiwi, Ash Shab and Wadi Tiwi: the development of an oasis on the north-eastern coast of Oman. Journal of Oman Studies 13, 57-90, ==> link to article.

Alcamo, J., Döll, P., Henrichs, T., Kaspar, F., Lehner, B., Rösch, T., Siebert, S. (2003). Development and testing of the WaterGAP 2 global model of water use and availability. Hydrological Sciences Journal 48(3), 317-338, DOI:10.1623/hysj.48.3.317.45290.

Alcamo, J., Döll, P., Henrichs, T., Kaspar, F., Lehner, B., Rösch, T., Siebert, S. (2003). Global estimates of water withdrawals and availability under current and future "business-as-usual" conditions. Hydrological Sciences Journal 48(3), 339-348, DOI:10.1623/hysj.48.3.339.45278.

Döll, P., Siebert, S. (2002). Global modeling of irrigation water requirements. Water Resources Research 38(4), 8.1-8.10, DOI:10.1029/2001WR000355.

Döll, P., Siebert, S. (2000). A digital global map of irrigated areas. ICID Journal 49(2), 55-66, ==> link to article.


BOOKS

Siebert, S. (2006): Analysis of arid agricultural systems using quantitative image analysis, modelling and geographical information systems. Kassel University Press, Dissertation, 180 pp.

BOOK CHAPTERS

Siebert, S., Döll, P. (2011). Bewässerungswassernutzung – eine globale Perspektive. In: Lozán, J.L., H. Graßl, P. Hupfer, L. Karbe & C-D. Schönwiese (eds.): Warnsignal Klima: Genug Wasser für alle? Climate Service Center, Helmholtz-Zentrum Geesthacht, Germany, 173-178, ==> link to article ==> link to e-book.

Siebert, S., Döll, P. (2007). Irrigation water use - A global perspective. In: Lozán, J.L., H. Graßl, P. Hupfer, L. Menzel & C-D. Schönwiese (eds.): Global Change: Enough Water for all? Universität Hamburg / GEO, 104-107, ==> link to article.

Döll, P., Kaspar, F., Siebert, S., Alcamo, J. (1999). Global modeling of runoff and irrigation requirements in typical dry years. In Gottschalk, L., Olivry, J.-C., Reed, D., Rosbjerg, D. (eds.): Hydrological Extremes: Understanding, Predicting, Mitigating. Publication 255, IAHS Press, Wallingford, Great Britain, 137-143.


CONFERENCE PROCEEDINGS

Siebert, S., Ewert, F. (2011). Spatio-temporal patterns of phenological development in Germany in relation to temperature and day length. Gemeinsame Jahrestagung der Deutschen Gesellschaften für Pflanzenernährung und Pflanzenbauwissenschaften, September 27-29, Kiel, Germany, Book of abstracts, 182. ==> link to poster

Siebert, S., Hoogeveen, J., Döll, P., Faurès, J.-M., Feick, S., Frenken, K. (2006). The digital global map of irrigation areas – development and validation of map version 4. Tropentag 2006, October 11-13, Bonn, Germany, Book of abstracts, 117.

Portmann, F., Döll, P., Siebert, S. (2006). Global dataset of monthly crop-specific irrigated areas around the year 2000. Tropentag 2006, October 11-13, Bonn, Germany, Book of abstracts, 269.

Buerkert, A., Nagieb, M., Siebert, S., Luedeling, E., Quintern, M. and Alkhanjari, S. (2005). Plant genetic diversity, irrigation and nutrient cycling in traditional mountain oases of Northern Oman. In: Li, C.J. et al. (eds.). Plant Nutrition for Food Security, Human Health and Environmental Protection. Tsinghua University Press, Beijing, China, 1072-1073.

Siebert, S., Döll, P., Hunger, M. (2004). Global-scale scenarios and modelling as tools for managing large scale nitrogen pollution. In: Halm, D. and Grathwohl, P. (eds.): Proceedings of the 2nd International Workshop on Integrated Soil and Water Protection: Risks from Diffuse Pollution (SOWA) held in Prague, Czech Republic, from 28 to 29 June 2004, Center for Applied Geoscience, Eberhard Karls University of Tübingen, Tübingen, Germany, 99-104.

Gräfe, S., Siebert, S., Brülheide, H., Bürkert, A. (2004). Changes in the agricultural structure of the Quira Oasis. In: Runge, M. and Zhang X. (ed.): Ecophysiology and Habitat Requirements of Prennial Plant Species in the Taklimakan Desert. Contributions to a "Workshop on Sustainable Management of the Shelterbelt Vegetation of River Oases in the Taklimakan Desert", Urumqui 2003, 35-41.

Siebert, S., Gries, D., Zhang, X., Runge, M., Buerkert, A. (2004). Non-destructive dry matter estimation of Alhagi sparsifolia vegetation in a desert oasis of NW China. In: Runge, M. and Zhang, X. (eds.): Ecophysiology and habitat requirements of perennial plant species in the Taklimakandesert. Contributions to a “Workshop on Sustainable Management of the Shelterbelt Vegetation of River Oases in the Taklimakan Desert“, Urumqi 2003, 121-122.

Luedeling, E., Siebert, S., Wichern, F., Aeschbach-Hertig, W., Nagieb, M., Müller, T., Buerkert, A. (2002). The hydrology of mountain oases in northern Oman. Tropentag 2002, October 9-11, Kassel-Witzenhausen, Germany, Book of abstracts, 45.

Weier, H., Nagieb, M., Siebert, S. (2002). Water as a natural resource of the Oman mountains. Tropentag 2002, October 9-11, Kassel-Witzenhausen, Germany, Book of abstracts, 51.

Döll, P., Alcamo, J., Henrichs, T., Kaspar, F., Lehner, B., Rösch, T., Siebert, S., Vassolo, S. (2002). The global water model WaterGAP 2: hydrology model and water use model. Tropentag 2002, October 9-11, Kassel-Witzenhausen, Germany, Book of abstracts, 117.

Nagieb, M., Siebert, S., Buerkert, A. (2002). GIS-based survey and nutrient fluxes in a mountain oasis of Oman. Tropentag 2002, October 9-11, Kassel-Witzenhausen, Germany, Book of abstracts, 214.


RESEARCH REPORTS

Freydank, K., Siebert, S. (2008). Towards mapping the extent of irrigation in the last century: time series of irrigated area per country. Frankfurt Hydrology Paper 08, Institute of Physical Geography, University of Frankfurt, Frankfurt am Main, Germany, 46 pp.

Siebert, S., Döll, P. (2008). The Global Crop Water Model (GCWM): Documentation and first results for irrigated crops. Frankfurt Hydrology Paper 07, Institute of Physical Geography, University of Frankfurt, Frankfurt am Main, Germany, 42 pp.

Portmann, F., Siebert, S., Bauer, C., Döll, P. (2008). Global data set of monthly growing areas of 26 irrigated crops. Frankfurt Hydrology Paper 06, Institute of Physical Geography, University of Frankfurt, Frankfurt am Main, Germany, 400 pp.

Siebert, S., Hoogeveen, J., Frenken, K. (2006). Irrigation in Africa, Europe and Latin America. Update of the Digital Global Map of Irrigation Areas to Version 4. Frankfurt Hydrology Paper 05, Institute of Physical Geography, Frankfurt University, Frankfurt am Main, Germany, 134 pp.

Feick, S., Siebert, S., Döll, P. (2005). A Digital Global Map of Artificially Drained Agricultural Areas. Frankfurt Hydrology Paper 04, Institute of Physical Geography, Frankfurt University, Frankfurt am Main.

Siebert, S. (2005). Global-scale modeling of nitrogen balances at the soil surface. Frankfurt Hydrology Paper 02, Institute of Physical Geography, Frankfurt University, Frankfurt am Main, Germany, 35 pp.

Siebert, S., Feick, S., Hoogeveen, J. (2005). A digital global map of irrigated areas - An update for Asia. Frankfurt Hydrology Paper 01, Institute of Physical Geography, Frankfurt University, Frankfurt am Main, Germany, 115 pp.

Siebert, S., Döll, P. (2001). A digital global map of irrigated areas – An update for Latin America and Europe. Kassel World Water Series 4, Center for Environmental Systems Research, University of Kassel, Germany, 14 pp + Appendix.

Döll, P., Siebert, S.(1999): A digital global map of irrigated areas. Kassel World Water Series 1, Center for Environmental Systems Research, University of Kassel, Germany, 23 pp + Appendix.

Alcamo, J., Döll, P., Kaspar, F., Siebert, S. (1997). Global change and global scenarios of water use and availability: An application of WaterGAP 1.0, Report A9701, Center for Environmental Systems Research, University of Kassel, Germany, 47 pp + Appendix.

Journal article reviewing

• Agricultural Systems
• Agricultural Water Management
• Agriculture Ecosystems and Environment
• Biosystems Engineering
• Earth Science Informatics
• European Journal of Agronomy
• Field Crops Research
• Geophysical Research Letters
• Global Change Biology
• Global Ecology and Biogeography
• Hydrology and Earth Systems Sciences
• IEEE Geoscience and Remote Sensing Letters
• IEEE Transactions on Geoscience and Remote Sensing
• Irrigation Science
• Journal of Agriculture and Rural Development in the Tropics and Subtropics
• Journal of Geophysical Research
• Journal of Hydrology
• Nature
• Physics and Chemistry of the Earth
• PNAS
• Regional Environmental Change
• Remote Sensing
• Remote Sensing of Environment
• Science of the Total Environment
• Water Resources Management
• Water Resources Research