Information - MPRG5 Magnetic records and climatic changes (co-listed in CL)
This session has two independent goals: 1) evaluate available evidences of possible links between the geomagnetic field variations and the paleoclimate variations and envisage their mechanisms; 2) Assess recent advances in soil and sediments magnetic characterization and their relevance for detection of (paleo-)climate and (paleo-)environmental changes.
1) Earth (paleo-)magnetism and (paleo-)climatology are two disciplines of geophysical sciences whose interaction must be (and historically was) considered with extreme care and caution. Recent paleomagnetic and archeomagnetic records can at present be compared with paleoclimatic variations records at the scales of few millennia to one million year. The validity of the signals, their resolution and their temporal coverage progressively met the criteria required for: i) quantifying correlation; ii) qualifying or even quantifying phase relationships (leads or lags).
2) Rock-magnetism offers high sensitivity and high-resolution tools to decipher lithological and geochemical changes of sediments and soils, linked with past climatic and environmental changes. From single parameter, high-resolution rock-magnetic characterizations to multi-proxy parameter networks characterizing mixtures of metal oxides and/or sulphides, the rock-magnetic methods interact with other methods (rock physics, geochemistry, paleobiology…), for a better qualification and when possible a quantification of paleoclimate variations at the local, regional or global scale.
Preliminary List of Solicited Speakers
Vincent COURTILLOT, IPGP PARIS
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