Calculated based on number of publications stored in Pure and citations from Scopus

Research activity per year

If you made any changes in Pure these will be visible here soon.

Personal profile

Research interests

My scientific career started during my second year of master (2003-2004) at the department of Geology and Oceanography of the University of Talence (Bordeaux, France). During my internship, I developed a strong interest for the fields of paleoceanography and paleoclimatology under the supervision of Jacques Giraudeau (webpage). My master thesis aimed to reconstruct the dynamics of the North Atlantic Ocean circulation during the Holocene (the last ±10.000 years) through the detailed analysis of coccolithophore assemblages (marine calcifying planktonic microalgae) from a marine sedimentary archive retrieved in the eastern Norwegian Sea. The results of this work were published in 2 scientific articles: Solignac et al. (2008) and Giraudeau et al. (2010) (see section B.1 for the list of references). Each of these studies document millennial-scale modulation of the main currents of the North Atlantic and a major reorganization of the surface circulation patterns during the Holocene.
In October 2004, I started a PhD thesis under the supervision of Luc Beaufort (webpage) at the European Center of Environmental Geosciences (CEREGE, Aix-en-Provence, France), continuing the in-depth study of how coccolithophore assemblages can be used to reconstruct past climate variability at different temporal (seasonal to millennial) scales. More specifically, I studied the impact of climate variability (El Niño Southern Oscillation) and climate change (rising atmospheric CO2) on the assemblages of coccolithophores. The results of my thesis were published in 4 scientific articles: Grelaud et al. (2009a, 2009b) and Beaufort and Grelaud (2017) on the impact of El Niño and Beaufort et al. (2011, Nature) on the decrease of the mass of coccolithophores calcite as a result of atmospheric CO2 concentrations increase. During the last year of my thesis I have been teaching (degree, master) at the University of Aix-Marseille III (France) mainly in the field of geology (see section G.2 for more details). After the defense (December 2008), I have been contracted by the CEREGE for 6 months as analyst in oceanography and I was in charge of oceanographic database and satellite data analysis.
In 2009, I started a postdoc, in the group of Patrizia Ziveri (webpage) at the ICTA-UAB, on the regime shift of Mediterranean phytoplankton and zooplankton communities associated to climate change. Since then, I mainly worked on the impact of ocean acidification and ocean warming on Mediterranean calcifiers as a result of anthropogenic climate change (Bonomo et al., 2012; Horigome et al., 2014; Milner et al., 2016; Mallo et al., 2017; D’Amario et al., 2017, 2018, 2020) and past climate change (Grelaud et al., 2013; Balestrieri et al., 2021). From 2012 to 2014, I have been contracted as a research support technician at the ICTA-UAB. I was (and still am) in charge of SYRACO, an automatic system of coccoliths recognition, which measures the size and mass of individual coccolith (the inorganic fossil remains of coccolithophores). In addition to laboratory work, I gained experience in the field of data management as I was in charge to collect, compile and store the data produced in the frame of the European FP7 MedSeA project (coordinator P. Ziveri). After this contract and a period of unemployment of 7 months I started a new postdoc at the ICTA-UAB in 2015 during which I continued my research on marine calcifiers and climate change.
In 2017, I diversified my activity as I became the scientific coordinator of the European Interreg Med BLUEISLANDS project dealing with the seasonal variation of waste generation in Mediterranean islands as an effect of tourism, focusing my research on marine litter and microplastics (Simon et al., 2019; Grelaud and Ziveri 2020). In this context, I set and developed the Micrroplastics Extraction Laboratory (MEL) at the ICTA-UAB. In September 2020, I started a new international project (i-plastic, coordinator P. Ziveri) aiming at quantifying the fluxes of micro- and nanoplastics from the land-ocean interface to the open ocean. In this project I am in charge of the coordination of the work package 1: in-situ observation, dealing mainly with the seasonal sampling of micro- and nanoplastics in 3 estuaries (the Cocó estuary in Brazil, the Mondego estuary in Portugal and the Ebro estuary in Spain).
I have participated in 17 articles published in international journals, including very recognized such as Nature, Science of the Total Environment, Scientific Reports, Quaternary Science Reviews. I am co-author of 5 papers under review (2 in the field of paleoceanography, 1 dealing with marine calcifiers and climate change and 2 on microplastics). My h index is 12 and I have 620 citations (Scopus). Since 2009, I have participated directly to competitive national and international projects: MedECOS (FP6 CM20004365-E), MedSeA (FP7-265103), Interreg Med BLUEISLANDS (IMED15_3.1_M12_273), CALMED (CTM2016-79547-R) and i-plastic (PCI-2020112059). At academic level I have co-supervised 9 master thesis and 1 doctoral thesis, and I am currently co-supervising 1 doctoral thesis.
In 2016 and 2019 I cumulated 5 months of paternity leave.

Expertise related to UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):

  • SDG 3 - Good Health and Well-being
  • SDG 8 - Decent Work and Economic Growth
  • SDG 11 - Sustainable Cities and Communities
  • SDG 12 - Responsible Consumption and Production
  • SDG 13 - Climate Action
  • SDG 14 - Life Below Water

Education/Academic qualification

Ph. D., Geociencias y Medio Ambiente, Universidad Aix-Marseille, CNRS, Aix-en-Provence (Francia). Supervisor: Luc Beaufort

Award Date: 10 Dec 2008

Masters, Máster en Oceanografía y Paleoceanografía, Departamento de Geología y Oceanografía de Burdeos (Francia)

Award Date: 22 Jun 2004

Degree, Licenciado en Oceanografía, Departamento de Geología y Oceanografía de Burdeos (Francia)

Award Date: 16 Jun 2003

Degree, Licenciado en Ciencias Ambientales, Universidad de geología de Dijon (Francia)

Award Date: 2 Jul 2002

External positions

Analista en Oceanografía, Univerdad Aix-Marseille, CNRS, Aix-en-Provence (Francia)

1 Jan 200931 Mar 2009

Profesor Temporal y Asistente de Investigación, Univerdad Aix-Marseille, CNRS, Aix-en-Provence (Francia)

1 Oct 200730 Jun 2008

Estudiante de doctorado, Univerdad Aix-Marseille, CNRS, Aix-en-Provence (Francia)

1 Oct 200430 Sept 2007


Dive into the research topics where Michael Grelaud . is active. These topic labels come from the works of this person. Together they form a unique fingerprint.
  • 1 Similar Profiles

Collaborations and top research areas from the last five years

Recent external collaboration on country/territory level. Dive into details by clicking on the dots or