The carbon cycle and climate change,

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• The carbon cycle and climate change,
• project of the LSCE (IPSL, CEA-CNRS, France)
• with secondary schools in Île-de-France

Marc Jamous marc.jamous_at_cea.fr
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• Aims
• to promote investigation rather than lectures
• to present the research world to students
• to have students projects in March 2007

• In these aims, we will
• propose experimental materials with many choices
  of protocols
• visit classrooms to
• launch the project and raise questions
• present research jobs
• propose classrooms to visit our laboratory

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• Three subjects of thinking
• dendrochronology,
• study of carbon sources and sinks,
• study of carbon exchanges between atmosphere and
  ocean.

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dendrochronology

• Questions
• Can we get climate information from trees?
• Are all rings of a tree similar?
• Experimentation
• How to measure rings?
• Working in groups -gt measure precision and
  experimental error
• Edit the profile ring width versus years

• Modeling
• From experimental results and with
  meteorological data, construction of a model
  ring width and meteorological events
• Model validation
• Profiles for past centuries (Xth or XVIIIth
  century) will be analyzed and compared with
  historical texts.

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study of carbon sources and sinks

• Questions
• Where does atmospheric CO2 come from?
• How is atmospheric CO2 regulated?
• Is the atmospheric CO2 concentration similar all
  through the day, all through the year?
• Experimentation
• CO2 concentration measured in several places
• Construction of little greenhouses with CO2
  sensors
• Aims

• Understanding of the carbon cycle (daily and
  seasonal)

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study of carbon exchanges between atmosphere and
ocean

• Questions
• Does any exchange occur between atmospheric and
  ocean CO2?
• Are they similar all over the Earth?
• What changes in the ocean produce atmospheric
  CO2 rises?
• Experimentation

CO2
Sea water
clam
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• 11 secondary schools
• from level 6 to 11
• publication in March 2007
• results on a Website (opening early December)

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Thank you