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Dr. Hella Ellen Ahrends

Postdoctoral Research Scientist

E-Mail: [Email protection active, please enable JavaScript.]Hella
Telefon: +49 (0)228 73 7200
Raum: 2.015


Research profile

My research focuses on using data from established and new remote sensing techniques in combination with modelling approaches for ecological applications. Specifically, I am interested in the use of non-invasive sensor techniques to study the impact of global change on natural and managed ecosystem processes and biodiversity, improve the identification of phenotypes in crop production systems and corresponding model approaches and to improve the modelling of photosynthesis and the quantification of the components of the energy balance at different spatial scales.

Select publications

Ahrends HE, Eugster W, Gaiser T, Rueda-Ayala V, Hüging H, Ewert F, Siebert S (2018) Genetic yield gains of winter wheat in Germany over more than 100 years (1895-2007) under contrasting fertilizer applications. Environ. Res. Lett.

Rueda-Ayala, HE Ahrends, S Siebert T Gaiser, H Hüging, F Ewert (2018) Impact of nutrient supply on the expression of genetic improvements of cereals and row crops – A case study using data from a long-term fertilization experiment in Germany. European Journal of Agronomy, Volume 96, 2018, Pages 34-46

JL May, NC Healey, HE Ahrends, RD Hollister,CE Tweedie, JM Welker, WA Gould, SF Oberbauer (2017) Short-Term Impacts of the Air Temperature on Greening and Senescence in Alaskan Arctic Plant Tundra Habitats Remote Sensing, 2017, 9(12), 1338;

Wieneke S, Ahrends HE, Damm A, Pinto F, Stadler A, Rossini M, Rascher U (2016): Airborne based spectroscopy of red and far-red sun-induced chlorophyll fluorescence: Implications for improved estimates of gross primary productivity. Remote Sensing of Environment, 184, 654–667, doi:10.1016/j.rse.2016.07.025.

Neukam D, Ahrends HE, Luig A, Manderscheid R, Kage H (2016): Integrating wheat canopy temperatures in crop system models. Agronomy, 6, doi:10.3390/agronomy6010007.

Wingate et al. (2015): Interpreting canopy development and physiology using a European phenology camera network at flux sites. Biogeosciences, 12, 5995-6015, doi:10.5194/bg-12-5995-2015.

Ahrends HE, Haseneder-Lind R, Schween J, Crewell S, Stadler A, Rascher U (2014): Diurnal dynamics of wheat evapotranspiration derived from ground-based thermal imagery. Remote Sensing, 6, 9775-9801, doi:10.3390/rs6109775.

Healey NC, Oberbauer S, Ahrends HE, Dierick D, Welker JM, Leffler AJ, Hollister RD, Vargas SA, Tweedie CE (2014): A mobile instrumented sensor platform for long-term terrestrial ecosystem observation: an example application in an arctic tundra ecosystem. Journal of Environmental Informatics, 24, 1-10, doi:10.3808/jei.201400278.

Ahrends HE, Oberbauer SF, Eugster W (2011): Small-scale albedo–temperature relationship contrast with large-scale relations in Alaskan acidic tussock tundra. SPIE Remote Sensing, Conference Proceedings. doi:10.1117/12.974381.

Ahrends HE, Etzold S, Kutsch WL, Stoeckli R, Bruegger R, Jeanneret F, Wanner H, Buchmann N, Eugster W (2009): Tree phenology and carbon dioxide fluxes: use of digital photography for process-based interpretation at the ecosystem scale. Climate Research, 39, 261-274, doi:10.3354/cr00811.

Ahrends HE, Brügger R, Stöckli R, Schenk J, Michna P, Jeanneret F, Wanner H, Eugster W (2008): Quantitative phenological observations of a mixed beech forest in northern Switzerland with digital photography. Journal of Geophysical Research, 113, G04004, doi:10.1029/2007JG000650.