Dr Dionysios Raitsos

Earth Observation Scientist

Dr Dionysios Raitsos

Contact Details

+44 (0)1752 633100 (switchboard)

Dr. Dionysios Raitsos is a Senior Research Scientist at PML. He received his BSc in Marine Biology, MSc in Fisheries Science, and PhD in Satellite Oceanography (from Newcastle, Aberdeen, & Plymouth respectively). He worked for 6 yrs as a post-doctoral researcher in Greece (HCMR) and Saudi Arabia (KAUST). He joined the Remote Sensing Group (RSG) at PML in 2013.

Dionysis is interested in satellite remote sensing applications in ocean colour, plankton, and fisheries in relation to the regional environmental variability and broader climate oscillations (Atlantic, Pacific and Mediterranean Sea). Also, following an inter-disciplinary approach, synergistically analysing available datasets, we are studying the function of the Red Sea ecosystem, and investigating the large–scale variability of this pristine tropical ecosystem. On these subjects, he has published 42 papers in peer-reviewed Journals, and contributed in 3 books.

He has worked in several EU FP-6 and FP-7 projects, and is a reviewer in 22 international Journals including: Limnology and Oceanography, Remote Sensing of Environment, Ecology Letters, Plos One, Nature Publishing Group etc. Dionysis is a Review Editor in Frontiers in Marine Science, and a Guest Editor for Remote Sensing.

View my 'Loop' profile

Key Projects

Project PI: Virtual Red Sea Initiative -  2017, 3-years project funded by KAUST [partners PML, KAUST, Scripps, MIT].
Project co-PI: SOLSTICE-WIO: Sustainable Oceans, Livelihoods and food Security Through Increased Capacity in Ecosystem research in the Western Indian Ocean -2017, 4-years project funded by NERC [partners: Southampton, NOC, PML,  etc].


Raitsos D.E., Brewin R.J.W., Zhan P., Dreano D., Pradhan Y., Nanninga G.B., Hoteit I. (2017). Sensing coral reef connectivity pathways from space. Scientific Reports, Nature Publishing Group, 10.1038
Gittings J.A., Raitsos D.E., Racault M-F., Brewin R.J., Pradhan Y., Sathyendranath S., Platt T. (2017). Seasonal Phytoplankton Blooms in the Gulf of Aden revealed by Remote Sensing. Remote Sensing of Environment, 165: 64-85.
Al-Naimi N., Raitsos D.E., Ben-Hamadou R., Soliman Y. (2017). Evaluation of Satellite Retrievals of Chlorophyll-a in the Arabian Gulf. Remote Sensing, 9, 301, doi:10.3390/
Batten S.D., Raitsos D.E., McQuatters-Gollop A., Hopcroft R., Coyle K. (2017). Interannual variability in lower trophic levels on the Alaskan Shelf. Deep-Sea Research Part II, 139: In Press.
Racault M.F., Sathyendranath S., Brewin R.J.W., Raitsos D.E., Jackson T., Platt T. (2017). Impact of El Niño Variability on Oceanic Phytoplankton. Frontiers in Marine Science, 4: 133.
Brewin R.J.W., Ciavatta S., Sathyendranth S., Jackson T., Tilstone G., Curran K., Airs R., Cummings D., Brotas V., Organelli E., Dall'Olmo G., Raitsos D.E. (2017). Uncertainty in ocean-colour estimates of chlorophyll for phytoplankton groups. Frontiers in Marine Science, 4: 104.
Bracher A., ……. Raitsos D.E. et al. (2017). Obtaining Phytoplankton Diversity from Ocean Color: A Scientific Roadmap for Future Development.  Frontiers in Marine Science, 4: 55.
Dreano D, Raitsos D.E., Gittings J., Krokos G., Hoteit I. (2016). The Gulf of Aden Intermediate Water Intrusion regulates the Southern Red Sea Summer Phytoplankton Blooms. PloS One, 11(12): e0168440.
Martinez E., Raitsos D.E., & Antoine D. (2016). Warmer, deeper and greener mixed layers in the north Atlantic subpolar gyre over the last 50 years. Global Change Biology, 22: 604-612.
Schuckmann K.,…. Raitsos D.E. et al. (2016). The Copernicus Marine Environment Monitoring Service Ocean State Report. Journal of Operational Oceanography. 9:2, 235-320, DOI: 10.1080/1755876X. 2016.1273446.
Pappadopoulos, V. P., Zhan P., Sofianos S.S., Raitsos D.E., Qurban M., Abualnaja Y., Bower A., Kontoyiannis H., Pavlidou A., Asharaf M.T.T., Zarokanellos N., Hoteit I. (2015). Factors governing the deep ventilation of the Red Sea. Journal Geophysical Research Oceans, 120, 7493–7505.
Raitsos D.E., Yi, X., Platt, T., Racault, M-F., Brewin, R. J. W., Pradhan, Y, Papadopoulos, V.P., Sathyendranath, S., & Hoteit, I. (2015). Monsoon oscillations regulate fertility of the Red Sea. Geophysical Research Letters, 42.
Brewin, R. J. W., Raitsos D.E., Dall’Olmo, G., Zarokanellos, N., Jackson, T., Racault, M-F., Boss, E., Sathyendranath, S., Jones, B. H. & Hoteit, I. (2015). Regional ocean-colour chlorophyll algorithms for the Red Sea. Remote Sensing of Environment, 165: 64-85.
Calbet A, Agersted M.D., Kaartvedt S, Møhl M., Møller E.F., Enghoff-Poulsen S., Paulsen M.L., Solberg I., Tang K.W., Tönnesson K, Raitsos D.E., Gissel Nielsen T. (2015). Heterogeneous distribution of plankton within the mixed layer and its implications for bloom formation in tropical seas. Scientific Reports, Nature Publishing Group: 5, 11240.
Racault, M-F., Raitsos D.E., Berumen, M.L., Brewin, R. J. W., Platt, T., Sathyendranath, S. &  Hoteit, I. (2015). Phytoplankton phenology indices in coral reef ecosystems: application to ocean-colour observations in the Red Sea. Remote Sensing of Environment, 160: 222–234.
Abualnaja Y, Papadopoulos V, Josey S, Hoteit I, Kontoyiannis, & Raitsos D.E. (2015). Impacts of Climate Modes on Air-Sea Heat Exchange in the Red Sea. Journal of Climate, 28, 2665–2681.
Tilstone, G.H., Xie Y, Robinson C., Serret P, Raitsos D.E., Powell T., Aranguren-Gassis M., Garcia-Martin E.E, Kitidis V. (2015). Satellite estimates of net community production indicate predominance of net autotrophy in the Atlantic Ocean, Remote Sensing of Environment, 164, 254-269.
McQuatters-Gollop, A., Edwards M., Helaouet P., Johns D.G., Owens N.J.P., Raitsos D.E., Schroeder D., Skinner J., Stern RF. (2015). The Continuous Plankton Recorder survey: How can long-term phytoplankton datasets contribute to the assessment of Good Environmental Status? Estuarine, Coastal and Shelf Science, 162, 88-97.
Raitsos DE, Pradhan Y, Lavender S, Hoteit I, McQuatters-Gollop A, Reid PC, Richardson A. (2014). From silk to satellite: half a century of ocean colour anomalies in the Northeast Atlantic. Global Change Biology, 20: 2117-2123.
Triantafyllou G, Yao F, Petihakis G, Tsiaras K, Raitsos DE, Hoteit I. (2014). A 3d biophysical model to explore the ecosystem functioning of the Red Sea. Journal of Geophysical Research, 119, 1791–1811.
Tzanatos E., Raitsos DE., Triantafyllou G., Somarakis S., Tsonis AA. (2014). Indications of a climate effect on Mediterranean fisheries. Climatic Change, 122: 41-54.
Raitsos DE., Pradhan Y, Brewin RJW, Stenchikov G, Hoteit I. (2013). Remote Sensing the Phytoplankton Seasonal Succession of the Red Sea. PLoS One, 8(6): 64909.
Brewin RJ, Raitsos DE, Pradhan Y, and Hoteit I. (2013). Comparison of Chlorophyll in the Red Sea derived from MODIS-Aqua and in vivo fluorescence. Remote Sensing of Environment, 136: 218-224.
Raitsos DE., Walne A., Lavender S.J., Licandro P, Reid P.C. and Edwards M. (2013). A 60 year ocean colour dataset from the Continuous Plankton Recorder. Journal of Plankton Research. 35 (1), 158-164.
Papadopoulos V.P., Abualnaja Y., Josey S.A., Bower A., Raitsos D.E., Kontoyiannis H., Hoteit I. (2013). Atmospheric forcing of the winter air-sea heat fluxes over the northern Red Sea. Journal of Climate. 26, 1685-1701.
Tsiaras K.P., Kourafalou V.H., Raitsos D.E., Triantafyllou G., Petihakis G. and Korres G. (2012). Inter-annual productivity variability in the North Aegean Sea: influence of thermohaline circulation during the Eastern Mediterranean Transient. Journal of Marine Systems. 96-97: 72-81.
Korres G., Triantafyllou G, Petihakis G., Raitsos D.E, Hoteit I., A. Pollani, Colella S. and Tsiaras K. (2012). A data assimilation tool for the Pagasitikos Gulf ecosystem dynamics: methods and benefits. Journal of Marine Systems. 94: 102-117.
Pancucci-Papadopoulou M.A., Raitsos D.E., Corsini-Foka M. (2012). Biological invasions and climatic warming: implications for South Eastern Aegean ecosystem functioning. Journal of the Marine Biological Association (JMBA). 92(4), 777–789.
Raitsos D.E., Korres G., Triantafyllou G., Petihakis G., Pantazi M., Tsiaras K. and Pollani A. (2012). Assessing chlorophyll variability in relation to the environmental regime in Pagasitikos Gulf, Greece. Journal of Marine Systems. 94: 16-22. 
Raitsos D.E., Hoteit I., Prihartato P.K., Chronis T., Triantafyllou G., Abualnaja Y. (2011). Abrupt warming of the Red Sea. Geophysical Research Letters. 38: L14601.
Chronis T., Raitsos D.E., and Kassis D. (2011). The influence of summer North Atlantic Oscillation on the Eastern Mediterranean. Journal of Climate. 24: 5584-5596.
Raitsos D.E., Lavender S.J., Maravelias C.D., Haralabous J., McQuatters-Gollop A., Edwards M, and Reid P.C. (2011). Macroscale factors affecting diatom abundance: a synergistic use of Continuous Plankton Recorder and satellite remote sensing data. International Journal of Remote Sensing. 32(8): 2081–2094.
Brewin R.J.W., Hardman-Mountford N.J., Lavender S.J, Raitsos D.E., Hirata T., Uitz J., Devred E., Bricaud A., Ciotti A., Gentili B. (2011). An intercomparison of bio-optical techniques for detecting dominant phytoplankton size class from satellite remote sensing. Remote Sensing of Environment: 115: 325-339.
Raitsos D.E., Beaugrand G., Georgopoulos D., Zenetos A., Pancucci-Papadopoulou M.A., Theocharis A., Papathanassiou E. (2010). Global climate change amplifies the entry of tropical species into the eastern Mediterranean Sea. Limnology and Oceanography. 55(4): 1478-1484. 
Henson, S., Raitsos D., Dunne J.P. & McQuatters-Gollop A. (2009). Decadal variability in biogeochemical models: comparison with a 50-year ocean colour dataset. Geophysical Research Letters, 36, L21601.
Karageorgis, A.P., V.H. Kourafalou, C. Anagnostou, K.P. Tsiaras, D.E. Raitsos, V. Papadopoulos and A. Papadopoulos. (2009). River induced particle distribution in the Northwestern Black Sea (September 2002 and 2004). Journal of Geophysical Research. 114: 1-16.
Raitsos D.E., Lavender S.J., Maravelias C.D., Haralambous J., Richardson A.J., Reid P.C. (2008). Identifying phytoplankton functional groups from space: an ecological approach. Limnology and Oceanography. 53(2): 605-613.
McQuatters-Gollop A., LD. Mee, Raitsos D.E., G.I. Shapiro. (2008). Non-linearities, regime shifts and recovery: The recent influence of climate on Black Sea chlorophyll. Journal of Marine Systems. 74: 649-658.
McQuatters-Gollop A., Raitsos D.E., Edwards M., Pradhan Y., Mee LD., Lavender S.J., Attrill M.J. (2007). A long-term chlorophyll dataset reveals a regime shift in North Sea phytoplankton biomass unconnected to increasing nutrient levels. Limnology and Oceanography. 52(2) 635-648.
McQuatters-Gollop A., Raitsos D.E., Edwards M., Attrill M.J. (2007). Spatial patterns of diatom and dinoflagellate seasonal cycles in the North – East Atlantic Ocean. Marine Ecology Progress Series. 339: 301-306.
Raitsos D.E., Lavender S.J., Pradhan Y., Tyrrell T., Reid P.C., Edwards, M. (2006). Coccolithophore Bloom Size Variation in Response to the Regional Environment of the Subarctic North Atlantic. Limnology and Oceanography. 51: 2122-2130.
Raitsos D.E., Reid P.C., Lavender S.J., Edwards M., Richardson A.J. (2005). Extending the SeaWiFS chlorophyll data set back 50 years in the northeast Atlantic. Geophysical Research Letters. 32, L06603.  

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