Dr. Jean-Pierre Barriot

Speech Title: The past and future of the Earth climate at the light of the past and present climates on Venus and Mars.


The more scientists look at the mathematical equations governing climate evolution, the more they realize just how complicated modeling Earth’s climate system is. To help increase confidence in the computer models, scientists are now looking at our sister planets, Venus and Mars. Both started out much more like Earth 4.5 billion years ago in the same region of the solar system, from the same dust clouds, but now show strikingly differences. Venus is a dry cloudy inferno and Mars is a frigid desert, but with abundant underground glaciers. What are the reasons of such different evolution paths? We will show that the evolutions of Venus, Earth and Mars were mainly driven by their distances to the Sun, their sizes, their intrinsic magnetic fields and Solar activity, casting a new light on the past, present and future climates of the Earth.

Born 1959, France
Areas of research in Geophysics and Astronomy: gravimetry, radiosciences, atmosphere, hydrology.

Master in Theoretical Physics, University of Montpellier, 1983.
PhD in Geophysics, University of Montpellier (France), 1987
Habilitation in Astronomy, University of Toulouse (France), 1997.
Current Positions:
Full Professor of Geophysics at the University of French Polynesia (Tahiti), 2006-
Guest Professor at the University of Wuhan (PRC), Remote Sensing Laboratory, 2015-
Former Positions:
Senior Engineer in Radiosciences, French Space Agency, 1989-2006.
Research Associate, Jet Propulsion Laboratory, 1991-1992.
Current Responsibilities:
Head, Laboratory of Geosciences and Informatics, Tahiti, 2006-
Head, Geodesy Observatory of Tahiti, 2006-
Head, Datacenter of the Int. Center for Geodynamics and Earth Tides (IGETS) of the Int. Association of Geodesy, 2015-
Former Responsibilities:
Head, Int. Gravimetric Bureau of the Int. Association of Geodesy,1999-2006
Head, Int. Center for Earth Tides of the Int. Association of Geodesy, 2007-2015
Co-I in radiosciences experiments in several planetary space missions: Magellan, Near, Rosetta, ExoMars