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Dr. Ghazaryan, Gohar

Junior Researcher

Research interests:
  • Time series analysis of imagery
  • Landcover/Landuse change
  • Cloud computing
  • Data fusion
  • Forest change analysis
Study Areas:
  • Ukraine
  • South Africa
  • Kazakhstan
  • Armenia
  • since 08/2015 Junior researcher, Center for Remote Sensing of Land Surfaces (ZFL)
  • 09/2013 - 03/2015 Erasmus Mundus Master course on Geospatial technologies: NOVA school of Statistics and Information Management (1st semester), Portugal, Westfälische Wilhelms-Universität Münster, Institute for Geoinformatics, Germany
  • 09/2008 - 06/2012 B.Sc. Cartography, Yerevan State University, Armenia
Current projects: GlobeDrought
Closed projects: EvIDENz
Recent publications:


  • Ghazaryan G., Dubovyk O., Kussul N.  & J. Schellberg (2020): Local Scale Agricultural Drought Monitoring with Satellite-based Multi-sensor Time-series. GIScience & Remote Sensing. 57(5), p.511-524. 
  • Landmann T., Dubovyk O., Ghazaryan G., Kimani J.  & E.M. Abdel-Rahman (2020): Wide-area Invasive Species Propagation Mapping is Possible Using Pheno-Metric Trends. ISPRS Journal of Photogrammetry and Remote Sensing, 159, p. 1-12. 
  • Graw V., Ghazaryan G., Schreier J., Gonzalez J., Abdel-Hamid A. Walz Y., Dall K., Post J., Jordaan A. & O. Dubovyk(2020): Timing Is Everything – Drought Classification For Risk Assessment. IEEE Geoscience and Remote Sensing Letters, p. 428-433.
  • Akinyemi F., Ghazaryan G. & O. Dubovyk (2020): Assessing UN Indicators of Land Degradation Neutrality and Proportion of Degraded Land Over Botswana Using Remote Sensing Based National Level Metrics. Land Degradation & Development.
  • Ghazaryan, G., Dubovyk, O., Löw, F., Lavreniuk, M., Kolotii, A., Schellberg, J., & Kussul, N. (2018). A rule-based approach for crop identification using multi-temporal and multi-sensor phenological metrics. European Journal of Remote Sensing, 51(1), 511-524.
  • Graw, V.; Ghazaryan, G.; Dall, K.; Delgado Gómez, A.; Abdel-Hamid, A.; Jordaan, A.; Piroska, R.; Post, J.; Szarzynski, J.; Walz, Y. & O. Dubovyk (2017): Drought Dynamics and Vegetation Productivity in Different Land Management Systems of Eastern Cape, South Africa—A Remote Sensing Perspective. Sustainability 2017, 9, 1728.
  • Ghazaryan, G., Dubovyk, O., Kussul, N., Menz, G., 2016. Towards an Improved Environmental Understanding of Land Surface Dynamics in Ukraine Based on Multi-Source Remote Sensing Time-Series Datasets from 1982 to 2013. Remote Sensing 8, 617.



  • Ghazaryan, G., Dubovyk, O., Graw, V., & Schellberg, J. (2018, October). Vegetation monitoring with satellite time series: an integrated approach for user-oriented knowledge extraction. In Remote Sensing for Agriculture, Ecosystems, and Hydrology XX (Vol. 10783, p. 107830W). International Society for Optics and Photonics.
  • Graw, V., Ghazaryan, G., Schreier, J., Gonzalez, J., Abdel-Hamid, A., Walz, Y., ... & Dubovyk, O. (2018, July). Timing is Everything-Drought Classification for Risk Assessment. In IGARSS 2018-2018 IEEE International Geoscience and Remote Sensing Symposium (pp. 8267-8270). IEEE.
  • Landmann, T., Dubovyk, O., Ghazaryan, G., Kimani, J., & Abdel-Rahman, E. (2017, July). Wide-area mapping of invasive species propagation and containment zones in somaliland using phenometric trends and generalized linear modelling. In 2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) (pp. 1103-1106). IEEE.
  • Ghazaryan, G.; Dubovyk, O., Kussul, N., & J. Schellberg (2017). Multi-Sensor Time Series Data Fusion for Agricultural Drought Assessment: Limitations and Potential. Proc ‘EnviroInfo 2017’. Luxembourg, 13-15 September, 2017


Books and Book Chapters:

  • Graw V., Dubovyk O., Duguru M., Heid P., Ghazaryan G., Villagran De Leon J., Post J., Szarzynski J., Tsegai D. & Y. Walz (2019): Chapter 9 - Assessment, monitoring, and early warning of droughts: the potential for satellite remote sensing and beyond. In: (eds.): E. Mapedza, D. Tsegai, M. Bruntrup & R Mcleman, Current Directions in Water Scarcity Research, Elsevier, Volume 2, 2019: 115-131, ISSN 2542-7946, ISBN 9780128148204,


MSc Thesis:

Ghazaryan, G. (2015). Analysis of temporal and spatial variations of forest. A case of study in notheastern Armenia.



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