Antoine Séjourné

Antoine Séjourné, Associate Professor Laboratory IDES Bât. 509 - Université Paris-Sud 91400 Orsay Cedex Tel. +33 (0)1 69 15 49 29 Fax: +33 (0)1 69 15 48 82 Email:antoine.sejourne@u-psud.fr

Research interests

My main research focuses on the geomorphological study of planetary surfaces to determine the geological and climatic history of planets.

Keywords : Geomorphology, Geology, Planetology, Periglacial, Climate change, Remote sensing, GIS

Research experience

• 2012-2013 : Post-Doctorat in Planetary Geology at the Institute of Geological Sciences in Wroclaw, Poland.

• 10/2008-12/2011 : Ph. D. thesis in Planetary Geology - Laboratory IDES – University Paris-Sud XI, Orsay - Supervisor: François Costard & Julien Gargani. “Formation and evolution of periglacial landforms in context of global warming: Application to the planet Mars and eastern Siberia”

• 2007-2008 : Master of Planetology with Honors – Univ. Paris-Sud XI, Orsay

• 2006-2007 : Master in Earth and Universe Sciences with Honors – Univ. Paris-Sud XI, Orsay

Teaching & Administration experience

• 2011-2012 : Teaching and Research Assistant in Earth and Planetary Science courses: undergraduate and graduate level (64h/year) Univ. Paris-Sud XI, Orsay

• 2008-2011 : Earth and Planetary Science courses during Ph.D. (64h/year) Univ. Paris-Sud XI, Orsay

• 2009-2011 : Ph. D. Student Representative at the Laboratory Council IDES

• 2008-2009 : Ph. D. Student Representative at the Doctoral School ED-143, Univ. Paris-Sud XI

Skills

Quantitative Geomorphology : Analyze of landscapes on Earth and Mars with remote sensing and field studies to characterize landforms and determine surface processes

Field experiences :

• Periglacial environments: geomorphological study of periglacial landforms in Central Yakutia (Sakha Republic, Russia) and in the Tuktoyaktuk Coastlands (Canada).
• Sedimentary basins: Geological mapping to reconstruct geological history of the Alps and Pyrenees mountain range
• Volcanic regions: Geological mapping and laboratory analyses of rock samples to study the chemistry and age of magmatic rocks in the Auvergne and Cantal volcanoes
• Geophysical survey : GPR, Electromagnetism, Gravimetry, Magnetic field, Refraction seismic, Electrical Resistivity Tomography to image the subsurface

Remote-Sensing :

• Photo-interpretation & georeferencing with ArcGIS, ErMapper (GIS software)
• Planetary image processing with USGS-Isis software

Leadership :

• Ph. D. student representatives; Undergraduate supervisions (2008; 2009)
• Organization member of the International Year of Planet Earth (UNESCO’s headquarters, Paris, 2008)

Project Manager :

• Scientific project proposal every year (Plan National de Planétologie)
• Short-film direction “Mars Mission Ice- Core” about Mars Exploration during “Festival Les chercheurs font leur cinema” in 2009 (Awarded): http://mmc.lmd.jussieu.fr/

Scientific outreach activities :

• Geological organizer for young disabled people (every year)
• Planetary Sciences organizer during Official public event “Day of Sciences” (every year)

Languages : English (fluent), Spanish (to be reactivated), Polish (basic), Russian (basic)

Publications

Séjourné, A., Costard, F., Gargani, J., Fedorov, A., Skorve, J. (2015). Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation. Geomorphology 241 (34-40).

Massé M., M.; Beck, P.; Schmitt, B.; Pommerol, A.; McEwen, A.; Chevrier, V.; Brissaud, O., Séjourné, A. (2014). Spectroscopy and detectability of liquid brines on Mars. Planetary and Space Science 92, 136-149.

Soare, R. J., Conway, S., Pearce, G., Costard, F., Séjourné, A. (2013). Sub-kilometre (intra-crater) mounds in Utopia Planitia, Mars: evidence of an ice-dust mantle? Icarus 225, Issue 2 (982-991).

Séjourné, A., Costard, F., Gargani, J., Soare, R. J., Marmo, C. (2012). Evidence of an eolian ice-rich and stratified permafrost in Utopia Planitia, Mars. Planetary and Space Science 60 (248-254).

Soare, R. J., Costard, F., Pearce, G., Séjourné, A. (2012). A re-interpretation of the recent stratigraphical history of Utopia Planitia: implications for late-Amazonian periglacial and ice-rich terrain. Planetary and Space Science 60 (131-139).

Séjourné, A., Costard, F., Gargani, J., Soare, R. J., Fedorov, A., Marmo, C. (2011). Scalloped depressions and small-sized polygons in western Utopia Planitia, Mars: A new formation hypothesis. Planetary and Space Science 59 (412-422).

Soare, R. J., Séjourné, A., Pearce, G., Costard, F., Osinski, G.R. (2011). The Tuktoyaktuk Coastlands of northern Canada: a possible “wet” periglacial analogue of Utopia Planitia, Mars. Geological Society of America, special analogues issue, 483 (203-218).

Communications

Oral presentation

Séjourné, A., Costard, F., Gargani, J., Fedorov, A., Soare, R. J., Marmo, C. (2011). Thermokarst degradation of potential ice-wedge polygons inside scalloped depressions in Utopia Planitia, Mars. Lunar and Planetary Science Conference vol. 41 abstract #1904 Houston, USA.

Séjourné, A., Costard, F., Soare, R. J., Fedorov, A., Gargani, J., Marmo, C. (2011). Formation of thermokarst lakes in Arctic regions on Earth: application to thermokarst-like depressions on Mars. International Conference Polar Worlds, Paris.

Séjourné, A., Costard, F., Gargani, J., Soare, R. J., Fedorov, A., Marmo, C. (2010). Thermokarst processes on Earth and Mars: Comparison between thermokarst lakes and thermokarst-like depressions in Utopia Planitia, Mars. Forum for Young Permafrost Scientists 2010 Yakutsk, Russia.

Séjourné, A., Costard, F., Gargani, J., Soare, R. J., Marmo, C. (2010). The polygon junction pits as an evidence of a particularly ice-rich area in Utopia Planitia. Lunar and Planetary Science Conference vol. 41 abstract #2113 Houston, USA.

Séjourné, A., Costard, F., Gargani, J., Marmo, C., Forget, F., Madeleine, J., Soare, R. J. (2009). Periglacial processes in Utopia Planitia, evolution of scalloped terrains: New insights from HiRISE observations. Lunar and Planetary Science Conference vol. 40 abstract #1733 Houston, USA.

Poster presentation

Séjourné, A., Costard, F., Gargani, J., Fedorov, A., Soare, R. J., and Marmo, C. (2012). Degradation of the periglacial landscape of Utopia Planitia under global warming : comparison Earth-Mars. Lunar and Planetary Science Conference vol. 42 abstract #1881 Houston, USA.

Séjourné, A., Costard, F., Gargani, J., Soare, R. J., Marmo, C. (2010). The steps inside scalloped terrains, exhumed stratification or/and gradual erosion in Utopia Planitia, Mars. European Planetary Science Congress vol. 5 abstract #409 Roma, Italy.

Séjourné, A., Costard, F., Gargani, J., Marmo, C., Forget, F., Madeleine, J., Soare, R. J. (2009). Periglacial processes in Utopia Planitia, evolution of scalloped terrains: New insights from HiRISE observations. Atelier de travail du Programme National de Planétologie: Modélisation expérimentale surface-subsurface/atmosphère des planètes France.

Séjourné, A., Costard, F., Gargani, J., Marmo, C. (2009). The periglacial processes in Utopia Planitia, Mars: Contribution of the high-resolution HiRISE imagery. Conference Universe & Origins, Orsay, France.