Project description DEENESFRITPL Earth's geology helps trace the evolution of the motion of our solar system As the Earth spins around its axis and rotates around the sun, its motion changes over time due to the gravitational pull of the moon and other planets. Evidence suggests that, over millions of years, these variations have significantly altered the Earth's climate. Mathematical models using changes in Earth’s orbit and spin to derive changes in the geological record have taken us back to the end of the Mesozoic era (66 million years ago) when the age of the dinosaurs ended, but it is difficult to 'see' further into the past. The EU-funded AstroGeo project is tackling the problem in reverse; the team plans to use the geological record to predict the orbital evolution of the solar system earlier than previously possible. A database of solutions will provide a new window on the evolution of our solar system. Show the project objective Hide the project objective Objective According to Milankovitch (1941), some of the large climatic changes of the past originate in the variations of the Earth’s orbit and of its spin axis resulting from the gravitational pull of the planets and the Moon. These variations can be traced over several millions of years (Ma) in the geological sedimentary records. Over the last three decades, the Earth’s orbital and spin solutions elaborated by the PI and his group (Laskar et al, 1993, 2004, 2011) have been used to establish a geological timescale based on the astronomical solution (e.g. Lourens et al, 2004; Hilgen et al, 2012). Nevertheless, extending this procedure through the Mesozoic Era (66-252 Ma) and beyond is difficult, as the solar system motion is chaotic (Laskar, 1989, 1990). It will thus not be possible to retrieve the precise orbital motion of the planets beyond 60 Ma from their present state (Laskar et al, 2011).The PI's astronomical solutions have been used by geologists to establish local or global time scales. AstroGeo is designed to achieve the opposite. We will use the geological record as an input to break the horizon of predictability of 60Ma resulting from the chaotic motion of the planets. This will be done in a quantitative manner, and aims to provide a template orbital solution for the Earth that could be used for paleoclimate studies over any geological time. This project stems from the achievement of Olsen et al (2019) where for the first time, in a study that involves the PI, it was possible to precisely recover the frequencies of the precessing motion of the inner planets. AstroGeo will not provide a single or a few solutions, but a whole database of solutions that would equally fit all available astronomical observations. This will open a new era where the geological records will be used to retrieve the orbital evolution of the solar system. It will thus open a new observational window for retrieving not only the history of the Earth, but of the entire solar system. Fields of science natural sciencescomputer and information sciencesdatabasesnatural sciencesearth and related environmental sciencespalaeontologypaleoclimatologyhumanitieshistory and archaeologyhistorynatural sciencesphysical sciencesastronomyplanetary sciencesplanetsnatural sciencesphysical sciencesastronomyplanetary sciencesnatural satellites Programme(s) H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) Main Programme Topic(s) ERC-2019-ADG - ERC Advanced Grant Call for proposal ERC-2019-ADG See other projects for this call Funding Scheme ERC-ADG - Advanced Grant Host institution CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS Net EU contribution € 2 267 706,00 Address RUE MICHEL ANGE 3 75794 Paris France See on map Region Ile-de-France Ile-de-France Paris Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 2 498 956,00 Beneficiaries (2) Sort alphabetically Sort by Net EU contribution Expand all Collapse all CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS France Net EU contribution € 2 267 706,00 Address RUE MICHEL ANGE 3 75794 Paris See on map Region Ile-de-France Ile-de-France Paris Activity type Research Organisations Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 2 498 956,00 Third-party Legal entity other than a subcontractor which is affiliated or legally linked to a participant. The entity carries out work under the conditions laid down in the Grant Agreement, supplies goods or provides services for the action, but did not sign the Grant Agreement. A third party abides by the rules applicable to its related participant under the Grant Agreement with regard to eligibility of costs and control of expenditure. SORBONNE UNIVERSITE France Net EU contribution € 231 250,00 Address 21 RUE DE L'ECOLE DE MEDECINE 75006 Paris See on map Region Ile-de-France Ile-de-France Paris Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 231 250,00