Dr. Sophia Walther

PostDoc
Current BGI Team
Abteilung Biogeochemische Integration (BGI)
Globale Diagnose Modelle
+49 3641 - 576235
C3.013

Aufgabengebiet

  • die Rolle von Vegetation für die Dynamik des terrestrischen Kohlenstoffkreislaufs
  • satellitenbasierte Fernerkundung von Vegetation
  • statistische Modellierung biogener Kohlenstofflüsse (www.fluxcom.org)

Vita

since 2018: 

PostDoc in der Global Diagnostic Modelling Group und zentrales Mitglied der Fluxcom-Initiative

2014 - 2018:

Doktorandin, 'Assessment of the dynamics of terrestrial vegetation using satellite observations of greenness and sun-induced chlorophyll fluorescence'

Institut für Weltraumwissenschaften, Freie Universität Berlin (03-10/2014)

Helmholtz GeoforschungsZentrum Potsdam (11/2014-02/2018)

Joint Research Centre, Ispra, Italy (09-12/2016, 05-07/2017)

2019: Ernst-Reuter-Prreis der Freien Universität Berlin für eine der fünf besten Doktorarbeiten 2018

2014:

MSc Meteorologie, Freie Universität Berlin


Peer-reviewed publications:

  • Bao, Wutzler, Koirala, Cuntz, Ibrom, Besnard, Walther, Šigut, Moreno, Weber, Wohlfahrt, Cleverly, Migliavacca, Woodgate, Merbold, Veenendaal, Carvalhais (2022). "Environment-sensitivity functions for gross primary productivity in light use efficiency models", Agricultural and Forest Meteorology, https://doi.org/10.1016/j.agrformet.2021.108708.
  • Walther, Besnard, Nelson, El-Madany, Migliavacca, Weber,  Ermida,  Brümmer,  Schrader, Prokushkin, Panov, and Jung (2021). "Technical note: A view from space on global flux towers by MODIS and Landsat: The FluxnetEO dataset", Biogeosciences Discuss. [preprint], https://doi.org/10.5194/bg-2021-314, in review
  • Linscheid, Mahecha, Rammig, Carvalhais, Gans, Nelson, Walther, Weber, Reichstein (2021). "Time-scale dependent relations between Earth observation based proxies of vegetation productivity". Geophysical Research Letters, https://doi.org/10.1029/2021GL093285
  • Li, Migliavacca, Forkel, Walther, Reichstein, Orth (2021), "Revisiting global vegetation controls using multi-layer soil moisture", Geophysical Research Letters, https://doi.org/10.1029/2021GL092856
  • Camps-Valls, Campos-Taberner, Moreno-Martínez, Walther, Duveiller, Cescatti, Mahecha, Munoz-Marí, García-Haro, Guanter, Jung, Gamon, Reichstein, Running, (2021), "A unified vegetation index for quantifying the terrestrial biosphere", Science Advances, https://advances.sciencemag.org/content/7/9/eabc7447
  • Jung, Schwalm, Migliavacca, Walther, Camps-Valls, Koirala, Anthoni, Besnard, Bodesheim, Carvalhais, Chevallier, Gans, Groll, Haverd, Ichii, Jain, Liu, Lombardozzi, Nabel, Nelson, Pallandt, Papale, Peters, Pongratz, Rödenbeck, Sitch, Tramontana, Weber, Reichstein, Köhler, O’Sullivan, Walker (2020), “Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach”, Biogeosciences, https://bg.copernicus.org/articles/17/1343/2020/
  • Duveiller, G., Filipponi, F., Walther, S., Köhler, P., Frankenberg, C., Guanter, L. and Cescatti, A. (2020), “A spatially downscaled sun-induced fluorescence global product for enhanced monitoring of vegetation productivity ”, Earth System Science Data, https://doi.org/10.5194/essd-12-1101-2020
  • Walther, S., Duveiller, G., Jung, M., Guanter, L., Cescatti, A., & Camps‐Valls, G. (2019). Satellite observations of the contrasting response of trees and grasses to variations in water availability, Geophysical Research Letters, 46. https://doi.org/10.1029/2018GL080535
  • Walther, S., Guanter, L., Heim, B., Jung, M., Duveiller, G., Wolanin, A., Sachs, T. (2018). Assessing the dynamics of vegetation productivity in circumpolar regions with different satellite indicators of greenness and photosynthesis, Biogeosciences, 15. https://www.biogeosciences.net/15/6221/2018/
  • Köhler, P., Guanter, L., Kobayashi, H., Walther, S., Yang, W. (2018. Assessing the potential of sun-induced fluorescence and the canopy scattering coefficient to track large-scale vegetation dynamics in Amazon forests, Remote Sensing of Environment, 204, pp. 769-785, http://doi.org/10.1016/j.rse.2017.09.025
  • Walther, S., Voigt, M., Thum, T., Gonsamo, A., Zhang, Y., Koehler, P., Jung, M., Varlagin, A., Guanter, L. (2016). Satellite chlorophyll fluorescence measurements reveal large-scale decoupling of photosynthesis and greenness dynamics in boreal evergreen forests, Global Change Biology, 22, 9, pp. 2979-2996, http://doi.org/10.1111/gcb.13200
  • Neef, L., Walther, S., Matthes, K., Kodera, K. (2014). Observations of stratospheric sudden warmings in Earth rotation variations, Journal of Geophysical Research, 119, 16, pp. 9666-9678. http://doi.org/10.1002/2014JD021621
  • Li, Migliavacca, Forkel, Walther, Reichstein, Orth (2021), " Revisiting global vegetation controls using multi-layer soil moisture", Geophysical Research Letters, https://doi.org/10.1029/2021GL092856
  • Camps-Valls, Campos-Taberner, Moreno-Martínez, Walther, Duveiller, Cescatti, Mahecha, Munoz-Marí, García-Haro, Guanter, Jung, Gamon, Reichstein, Running, (2021), "A unified vegetation index for quantifying the terrestrial biosphere", Science Advances, https://advances.sciencemag.org/content/7/9/eabc7447
  • Jung, Schwalm, Migliavacca, Walther, Camps-Valls, Koirala, Anthoni, Besnard, Bodesheim, Carvalhais, Chevallier, Gans, Groll, Haverd, Ichii, Jain, Liu, Lombardozzi, Nabel, Nelson, Pallandt, Papale, Peters, Pongratz, Rödenbeck, Sitch, Tramontana, Weber, Reichstein, Köhler, O’Sullivan, Walker (2020), “Scaling carbon fluxes from eddy covariance sites to globe: Synthesis and evaluation of the FLUXCOM approach”, Biogeosciences, https://bg.copernicus.org/articles/17/1343/2020/
  • Duveiller, G., Filipponi, F., Walther, S., Köhler, P., Frankenberg, C., Guanter, L. and Cescatti, A. (2020), “A spatially downscaled sun-induced fluorescence global product for enhanced monitoring of vegetation productivity ”, Earth System Science Data, https://doi.org/10.5194/essd-12-1101-2020
  • Walther, S., Duveiller, G., Jung, M., Guanter, L., Cescatti, A., & Camps‐Valls, G. (2019). Satellite observations of the contrasting response of trees and grasses to variations in water availability, Geophysical Research Letters, 46. https://doi.org/10.1029/2018GL080535
  • Walther, S., Guanter, L., Heim, B., Jung, M., Duveiller, G., Wolanin, A., Sachs, T. (2018). Assessing the dynamics of vegetation productivity in circumpolar regions with different satellite indicators of greenness and photosynthesis, Biogeosciences, 15. https://www.biogeosciences.net/15/6221/2018/
  • Köhler, P., Guanter, L., Kobayashi, H., Walther, S., Yang, W. (2018. Assessing the potential of sun-induced fluorescence and the canopy scattering coefficient to track large-scale vegetation dynamics in Amazon forests, Remote Sensing of Environment, 204, pp. 769-785, http://doi.org/10.1016/j.rse.2017.09.025
  • Walther, S., Voigt, M., Thum, T., Gonsamo, A., Zhang, Y., Koehler, P., Jung, M., Varlagin, A., Guanter, L. (2016). Satellite chlorophyll fluorescence measurements reveal large-scale decoupling of photosynthesis and greenness dynamics in boreal evergreen forests, Global Change Biology, 22, 9, pp. 2979-2996, http://doi.org/10.1111/gcb.13200
  • Neef, L., Walther, S., Matthes, K., Kodera, K. (2014). Observations of stratospheric sudden warmings in Earth rotation variations, Journal of Geophysical Research, 119, 16, pp. 9666-9678. http://doi.org/10.1002/2014JD021621


Projekte:

meine Projekte:

  • Vegetation and drought: towards improved data-driven estimates of ecosystem carbon fluxes under moisture stress (Vad3e mecum), 2-year ESA Living Planet Fellowship worth 99k EUR (https://eo4society.esa.int/lpf/sophia-walther/) , seit Juni 2020 

involviert:

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