Graduate School in Physics and Astrophysics ------------------------------------------- ANNUAL REPORT ------------------------------------------- Fill with a text editor (without TAB or formatting) Repeat fields for each course as necessary. ------------------------------------------- name: Baudena Alberto email: alberto.baudena@hotmail.it ciclo: 31 year completed (1,2 or 3): 2 supervisor: Guido Boffetta (Unito) and Francesco d'Ovidio (UPMC, Paris) ------------------------------------------- GRADUATE SCHOOL COURSES (only completed courses, with examination passed in the year) code: title: teacher: hours: ------------------------------------------- COURSES FROM OTHER GRADUATE SCHOOLS (only completed courses, with examination passed in the year) school: Agro-Paris Tech, Université Paris Sud title: Modélisation Statistique et Analyse de données Biologique teacher:Christine Dillmann hours: 64h NB: course taken in 2015 ------------------------------------------- UNDERGRADUATE COURSES (Laurea Magistrale) (only completed courses, with examination passed in the year) title: teacher: hours: ------------------------------------------- SUMMER SCHOOLS, INTERNATIONAL SCHOOLS (only those attended in the current year) title: Cross-Scale Interactions in the Coupled Geosphere-Biosphere System place: Aosta Valley, Valsavarenche webpage: http://www.to.isac.cnr.it/aosta/ days: 10 talk or poster (Y/N): N NB: Summer school in 2016 ------------------------------------------- CONFERENCES, WORKSHOP (only those attended in the current year) title: FineMed 2017, 3 days of meeting about "preparing the next generation fine scale experiments in the Mediterranean sea" place: Marseille, IRD webpage: www.mio.univ-amu.fr/~doglioli/FineMed days: 3 talk or poster (Y/N): Yes, a poster title: Ecole Doctorale 129 Conference place: Paris, rue de l'ecole de Medicine webpage: http://www.ed129.upmc.fr/fr/index.html days: 2 talk or poster (Y/N): Yes, both title: TOSCA DAYS place: 195 Rue Saint-Jacques, 75005 Paris webpage: / days: 2 talk or poster (Y/N): Yes, both title: Journées jeunes chercheurs 2017 place: Cité de l'éspace, Toulouse webpage: http://jc2-2017.com/ days: 3 talk or poster (Y/N): Yes, both NB: the same Conference was attended also in 2016 title: Extension of the Natural reserve of Kerguelen place: LOCEAN, UPMC, Paris webpage: http://www.taaf.fr/L-extension-de-la-reserve-naturelle-nationale-des-Terres-australes-francaises-rendue-possible-par-la-loi-sur-la-biodiversite days: 5 talk or poster (Y/N): N NB: 6-10 June 2016: Participation to the meeting organized by the TAAF (Terre Australes et Antarctiques Françaises) for the extension of the Natural reserve of Kerguelen. Francesco d'Ovidio and I were part of the group of experts of the turbulent dynamics of the region. title: Mycto 3D meeting group place: Tour Zamansky, UPMC, Paris webpage: / days: 2 talk or poster (Y/N): Yes, 20 minutes presentation NB: this Conference was in December 2015 title: Elephant Seals days place: Centre d'Etudes Biologiques de Chizé webpage: http://www.cebc.cnrs.fr/ days: 2 talk or poster (Y/N): Yes, 20 minutes presentation NB: this Conference was in April 2016 title: Meeting of PEPS Group place: LOCEAN webpage: / days: 1 talk or poster (Y/N): Yes, 20 minutes presentation NB: this Conference was on 10th of October, 2016 ------------------------------------------- VISITS AND STAGES (only those done in the current year) 5 weeks of sea campaign MD206 on the Marion Dufresne, as responsible of the acoustic measurement through the use of EK80 system. This is based on 18khz frequency (capable of detecting object larger than 30 cm), 38kHz (fish) and 70, 120 and 200 kHz (zooplankton) sonar. 12 January: arrive in Crozet, with land on the Island in the colony of penguins (22 000) and elephant seals (tenths). Institution: UPMC place: Indian Ocean starting date: 4/01/17 – 10/02/17 days: 38 The following visits were done in 2016 Institution: IFISC place: Palma de Mallorca starting date: 27 February 2016 days: 9 Institution: CLS (Collecte Localisation Satellites) place: Toulouse starting date: 4 July 2016 days: 5 NB : 3 presentations of 45 minutes each during the 5 days stage Institution: IFISC place: Palma de Mallorca starting date: 26 October 2016 days: 9 --------------------------------------------------- Research activity/Publications in the current year (max characters 2500) Scientific production. Publication of a paper in collaboration with Philippine Chambault : (“The Gulf Stream frontal system: A key oceanographic feature in the habitat selection of the leatherback turtle?”)(Université de Strasbourg, CNRS, IPHC UMR 7178 CNRS, F-67000 Strasbourg, France) on the 18th of March 2017 on ”Deep Sea Research Part I” (Chambault et al. 2017). In this paper the coupling between leatherback turtles and frontal features and biological variables is analysed. I computed different Lagrangian diagnostics (mainly FSLEs) along the turtles trajectories in the period of study (between 1st January 2014 and 1st May 2016), calculating one map per day. The work show how these features affect the foraging strategies of these animals. Research activity. My thesis aims at exploring the mechanisms of aggregation in the marine envi- ronment, both in space and time, with special emphasis on ecological processes. In particular, I focus on the dynamics at the meso- and submeso-scale (i.e. from few days to several weeks, and from ten to hundreds of kilometers) (Chelton et al. 2007). My study is concerned on the Indian sector of the Southern Ocean, in which the turbulent activity and the horizontal stirring are notably intense. These dynam- ics play a crucial role in the organization of the trophic chain, driving phyto- plankton distribution and growth, and structuring trajectories of top predators like elephant seals or king penguins (Cotté et al. 2011; d’Ovidio et al. 2010; L ?evy et al. 2012; Prants 2013; Weimerskirch et al. 2004; Woodson and Litvin 2015). However, less is known about the intermediate trophic levels and their hotspots of aggregation. In particular, during my work I study the myctophids, a fish particularly abundant in the Southern Ocean (Irigoien et al. 2014; Lubimova et al. 1987), and main prey of top predators (Cherel et al. 2008; Cott ?e et al. 2015; Guinet et al. 1996). From a methodological point of view, I use Lagrangian diagnostic applied to altimetry-derived currents (d’Ovidio et al. 2013), other satellite products like SST or chlorophyll concentration, developing idealised circulation models, and when possible integrating observations of floats’ trajectories, fish (acoustics) and biologging trajectories. My thesis is structured in three main parts: Axis 1: A Lagrangian diagnostic for trajectory aggregation in time. Axis 2: A mechanism for fish aggregation over fronts. Axis 3: Study of a trophic aggregation hotspot near Crozet. BE AWARE: research activity and Pubs are not evaluated as didactic credits, but are requested to trace the PhD students' career