A) Scientific work and results.
The 2-year project CLIMAGNET has been developed according to the next steps grouped into the two main objectives.
1. A complete review of the paleomagnetic database has been done. To compile the input database we have used the global compilation GEOMAGI50v3.2 (
http://geomagia.gfz-potsdam.de(se abrirá en una nueva ventana)).
2. We have ranked the dataset into two different categories following different quality criteria based on their reliabilities.
3. An accurate GF global model has been developed using the archeomagnetic database detailed above. For modelling purposes, we have used the Spherical Harmonic Analysis technique in space and the penalized cubic B-splines in time. In order to assure the convergence of the model at the Core Mantle Boundary (CMB) a regularization matrix will be used using a new method of fitting to determine the most appropriate damping parameters by combining the minimum energy of the GF at the CMB surface and the power spectra of the obtained Gauss coefficients.
4. Compilation of radionuclide records. The time series of 14C and 10Be (along with other cosmogenic isotopes with potential for climate reconstructions) have been compiled. The 10Be is recorded in ice cores and the 14C in tree rings.
5. Review of the state of art. This part of the objective 2 corresponds to a new and interesting issue and its well understanding has been crucial for developing CLIMAGNET. First, it has been needed to study the possible problems involved in isotopes production and then, an analysis of the influence of the GF variations in the rate of variations of cosmogenic isotopes has been performed.
6. Develop mathematical approaches for climatic correlation for the last millennia. Results have shown that the geomagnetic field exerts a strong modulation of multi-centennial to millennial wavelengths (periods of 800 and 2200 years) that have so far been wrongly assigned to solar activity. In addition, our results, have demonstrated that the non-dipole terms of the GF produce maximum differences of 7% in the global average radiocarbon production rate.
B) Fellow’s training, Transfer of knowledge and career development.
The host institution has given the MSCA fellow the opportunity to acquire new experience necessaries to develop a productive research career at the University: teaching activities. The MSCA fellow has participated as assistant professor in different lessons of the official degree in Physics of the Complutense University (number of hours: 102). In addition, the MSCA fellow has been the tutor or supervisor 4 PhD students and 2 Master students. During the 2-yr of CLIMAGNET, 3 PhD students have presented their PhD dissertation. In addition, during the 2-year of project the MSCA fellow has carried out an important work of exploitation and dissemination with important publications in indexed journal and the participation in national and international meetings. One of the objectives of the framework programme H2020 is to approach the science challenges to the society “Science with and for Society” giving effective cooperation between science and society, building capacities and developing innovative ways of connecting science to society. In this sense an important effort has been carried out allowing CLIMAGNET reaches a broad public and not only a narrow scientific community. The MSCA fellow has organized and participated in different scientific social events (Science Week, European Research Night, etc.).
