Marie-Antoinette Mélières, Docteur d’Etat in physics, taught basic physics and, later, climate and environmental science at Joseph Fourier University of Grenoble 1 and at the University of Savoie. Her research has covered various areas ranging from molecular spectroscopy and atmospheric physics to environmental and climate science. In 1995 she established the newsletter Global Change, published by the French National Committee on Climate Change, under the authority of the Academy of Sciences. The Committee is the French branch of the four international programs IGBP, WCRP, IHDP and Diversitas. She continued to edit this publication until 2008.

Chloé Maréchal, PhD, geochemist, is Maître de Conférences in the Observatoire des Sciences de l’Univers at Université Claude Bernard Lyon 1, where she teaches Earth Sciences at first university degree level and at Masters level. In her research into the biogeochemical cycles of copper and zinc in the Earth's outer layers, she established a protocol for using isotopes of these elements by plasma-source mass spectrometry and investigated their isotopic fractionation in marine sediments, as well as in soils affected by human activity. She also worked on the geochemical cycle of boron, using its isotopic signal in marine biogenic carbonates as tool in paleo-oceanographic reconstructions.