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Dr.-Ing. Helena Gerdener

Scientific staff member

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© Gerdener

Biography

M.Sc. Helena Gerdner joined the Institute for Geodesy and Geoinformation (IGG), Astronomical, Physical and mathematical Geodesy Group at the University of Bonn, in 2017.

  • Ph.D. (Title: A global drought monitoring framework using GRACE/-FO data assimilation)
  • M.Sc. (Title: Influence of ENSO and Atlantic modes on climate variables over West Africa)
  • B.Sc. (Title: Developing a multivariate drought index for West Africa from satellite remote sensing products and model outputs)
  • Since Oct. 2017 Wissenschaftliche Mitarbeiterin am Institut für Geodäsie und Geoinformation, Professur für Astronomische, Physikalische und Mathematische Geodäsie, Universität Bonn.
  • Okt. 2017 – Nov 2024 PhD (Dr.-Ing) am Institut für Geodäsie und Geoinformation, (Professur für Astronomische Physikalische und Mathematische Geodäsie), Universität Bonn.
  • 2015 – 2017 Master of Science am Institut für Geodäsie und Geoinformation, Universität Bonn.
  • 2012 – 2015 Bachelor of Science am Institut für Geodäsie und Geoinformation, Universität Bonn.
  • Gravity Recovery and Climate Experiment (GRACE) postprocessing for Level-3 solutions.
  • GRACE- based hydrological drought indicators.
  • Time series analysis.
  • Assimilation of GRACE into hydrological models
  • BMBF GlobeDrought
  • DFG-GlobalCDA
  • ESA-QSG4EMT
  • ESA-SING
  • Astronomische, Physikalische und Mathematische Geodäsie
  • Geodetic Earth Observation.
  • Satellite Geodesy and Earth System.
  • Betreuung Bachelor- und Masterarbeiten.
  • Mitglied im Institutsvorstand (2018-2022).
  1. Li, F., Kusche, J., Sneeuw, N., Siebert, S., Gerdener, H., Wang, Z., Chao, N., Chen, G., & Tian, K. (2024). Forecasting Next Year's Global Land Water Storage Using GRACE Data. Geophysical Research Letters, 51(17), e2024GL109101. https://doi.org/10.1029/2024GL109101
  2. Schulze, K., Kusche, J., Gerdener, H., Döll, P., & Schmied, H. M. (2024). Benefits and Pitfalls of GRACE and Streamflow Assimilation for Improving the Streamflow Simulations of the WaterGAP Global Hydrology Model. Journal of Advances in Modeling Earth Systems, 16(10), e2023MS004092. https://doi.org/10.1029/2023MS004092
  3. Müller Schmied, H., Trautmann, T., Ackermann, S., Cáceres, D., Flörke, M., Gerdener, H., Kynast, E., Peiris, T. A., Schiebener, L., Schumacher, M., and Döll, P. (2024). The global water resources and use model WaterGAP v2.2e: description and evaluation of modifications and new features, Geosci. Model Dev., 17, 8817–8852, https://doi.org/10.5194/gmd-17-8817-2024.
  4. Döll, P., Hasan, H. M. M., Schulze, K., Gerdener, H., Börger, L., Shadkam, S., Ackermann, S., Hosseini-Moghari, S.-M., Müller Schmied, H., Güntner, A., Kusche, J. (2024) Leveraging multi-variable observations to reduce and quantify the output uncertainty of a global hydrological model: evaluation of three ensemble-based approaches for the Mississippi River basin. Hydrology and Earth System Sciences, 28(10), 2259-2295, doi.10.5194/hess-28-2259-2024, https://hess.copernicus.org/articles/28/2259/2024/.
  5. Klos, A., Kusche, J., Leszczuk, G., Gerdener, H., Schulze, K., Lenczuk, A., & Bogusz, J. (2023) Introducing the Idea of Classifying Sets of Permanent GNSS Stations as Benchmarks for Hydrogeodesy. Journal of Geophysical Research: Solid Earth, e2023JB026988. https://doi.org/10.1029/2023JB026988.
  6. Gerdener, H., Kusche, J., Schulze, K., Doell, P., Klos, A.  (2023) The global land water storage data set release 2 (GLWS2.0) derived via assimilating GRACE and GRACE-FO data into a global hydrological model. J Geod 97, 73. https://doi.org/10.1007/s00190-023-01763-9.
  7. Güntner, A., Gerdener, H., Boergens, E., Kusche, J., Kollet, S., Dobslaw, H., Hartick, C., Sharifi, E., Flechtner, F. (2023) Veränderungen der Wasserspeicherung in Deutschland seit 2002 aus Beobachtungen der Satellitengravimetrie. Hydrologie & Wasserbewirtschaftung, 67, (2), 74-89. doi.org/10.5675/HyWa_2023.2_1.
  8. Gerdener, H., Schulze, K., Kusche, J.(2023) GLWS 2.0: A global product that provides total water storage anomalies, groundwater, soil moisture, and surface water with a spatial resolution of 0.5∘ from 2003 to 2019. PANGAEA, https://doi.org/10.1594/PANGAEA.954742.
  9. Dibi-Anoh, P. A., Koné, M., Gerdener, H., Kusche, J., N'Da, C. K. (2022) Hydrometeorological Extreme Events in West Africa: Droughts. Surveys in Geophysics, November 2022, https://doi.org/10.1007/s10712-022-09748-7.
  10. Gerdener, H., Kusche, J., Schulze, K., Ghazaryan, G., Dubovyk, O. (2022) Revising precipitation – water storages – vegetation signatures with GRACE-based data assimilation. Journal of Hydrology, Volume 612, Part A, September 2022, 128096, https://doi.org/10.1016/j.jhydrol.2022.128096.
  11. Meza, I., Rezaei, E.E., Siebert, S., Ghazaryan, G., Nouri, H., Dubovyk, O., Gerdener, H., Herbert, C., Kusche, J., Popat, E., Rhyner, J., Jordaan, A., Walz, Y., Hagenlocher, M. (2021) Drought risk for agricultural systems in South Africa: Drivers, spatial patterns, and implications for drought risk management, Science of The Total Environment, Volume 799, 149505, doi.org/10.1016/j.scitotenv.2021.149505.
  12. Deggim, S., Eicker, A., Schawohl, L., Gerdener, H., Schulze, K., Engels, O., Kusche, J., Saraswati, A. T., van Dam, T., Ellenbeck, L., Dettmering, D., Schwatke, C., Mayr, S., Klein, I., and Longuevergne, L. (2021) RECOG RL01: correcting GRACE total water storage estimates for global lakes/reservoirs and earthquakes, Earth Syst. Sci. Data, 13, 2227–2244, doi.org/10.5194/essd-13-2227-2021.
  13. Gerdener, H., Schulze, K., Olga, E., Kusche, J. (2020) RECOG-EQ RL01 Earthquake correction for CSR, GFZ and ITSG solutions of GRACE level 3 total water storage anomalies from 2003-01 to 2016-12 correcting for the Sumatra-Andaman (2004) and Tohoku (2011) earthquakes. PANGAEA, https://doi.org/10.1594/PANGAEA.921923.
  14. Meza, I., Siebert, S., Döll, P., Kusche, J., Herbert, C., Eyshi Rezaei, E., Nouri, H., Gerdener, H., Popat, E., Frischen, J., Naumann, G., Vogt, J. V., Walz, Y., Sebesvari, Z., and Hagenlocher, M. (2020) Global-scale drought risk assessment for agricultural systems, Nat. Hazards Earth Syst. Sci., 20, 695–712, doi.org/10.5194/nhess-20-695-2020.
  15. Gerdener, H., Engels, O., Kusche, J. (2020) A framework for deriving drought indicators from the Gravity Recovery and Climate Experiment (GRACE), Hydrol. Earth Syst. Sci., 24, 227–248, https://doi.org/10.5194/hess-24-227-2020.
  16. Gerdener, H. (2017) Influence of ENSO and Atlantic modes on climate variables over West Africa. Masterarbeit, Universität Bonn, 2017.
  17. Gerdener, H. (2015) Developing a multivariate drought index for West Africa from satellite remote sensing products and model outputs. Bachelorarbeit, Universität Bonn, 2015.

Contact

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Helena Gerdener

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