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Philippe Bousquet proposes a general overview of the greenhouse gases diversity, of the evolution of their emissions in the atmosphere, of their impact regarding additional greenhouse effect and of

Laurent Bopp links the greenhouse gases emissions with the climate evolution. He highlights the existence of - positive or negative - feedbacks in the earth system, which are able to amplify or to

Jean-Louis Dufresne presents the greenhouse effect mechanism, and talks about its relations with the greenhouse gases emissions.

Laurent Li presents a model which enables to better understand the Earth's radiation budget and the greenhouse effect mechanism.

Marielle Saunois talks about two kinds of greenhouse gases: the ozone - ground-level ozone and upper atmosphere ozone - and the halogenated compounds. She evidences the link between them, and the

Félix Vogel studies the dynamics of greenhouse gases emissions by urban areas, thanks to the use of specific tools and models. He examines the contribution of these areas in the future greenhouse

What are clouds? How do clouds form?  Why does water vapour transform into water droplets? Why do we have columns of rising air or thermals?  What about the vertical height of clouds? How do we

Why study planetary atmospheres? Mars as an illustration of the seasons. What is thermal inertia? Now let’s go to Mars. The seasons on Mars and on Earth. Venus as an illustration of the

Philippe Bousquet is interested in the methane, a greenhouse gas whose emissions a lot increased during the last century. He shows what are the natural and anthropogenic sources of methane, what are

How can human activities modify the global climate? How much change in the greenhouse effect is due to human activities? How do human activities change the albedo? How does the temperature of the

Nicolas Vuichard talks about nitrous oxide, a powerful greenhouse gas. He first shows the extent of the nitrogen cycle disruption by human activity, then he precisely examines the N2O emissions

What is the incident energy ? How is this energy modified by crossing the atmosphere ? What is the emitted energy ? Why do we use the term greenhouse effect ? And if we change the amount of