Nonlinear Processes in Geosciences

Tommaso Alberti

I am a researcher at the Istituto Nazionale di Geofisica e Vulcanologia (INGV) in Rome, Italy. My research has an inter-disciplinary character and it mainly focuses on the understanding of processes occurring in geosciences, space sciences, and complex systems at different spatio-temporal scales. My investigations revolve around several key areas as weather and climate extremes with impacts on aviation turbulence, airports closures due to the adverse weather conditions, Acqua Alta events in Venice, flooding events after huge storms; turbulence and dissipation in both fluids and plasmas; and tipping points to develop statistical methods for identifying transition thresholds in complex systems at bifurcation points at different spatio-temporal scales with application to climate and paleoclimate, turbulence, and epidemiology.

NPG Paper of the Month: “On fluctuating momentum-exchange in idealised models of air-sea interaction”

Tommaso Alberti February 3, 2020

Probability density function of the energy (normalized so that the average is unity for each variable) lost by the atmosphere and gained by the ocean at t=300 and averaging time τ=0, atmosphere full-line, ocean dashed-line, and for averaging time τ=100, atmosphere dotted-line, ocean dashed-dotted-line. All are clearly non-Gaussian. (Source: A. Wirth, On fluctuating momentum exchange in idealised models of air–sea interaction, Nonlin. Processes Geophys., 26, 457–477, https://www.nonlin-processes-geophys.net/26/457/2019/. License: https://creativecommons.org/licenses/by-nc-nd/4.0/.

This month the NPG Paper of the Month award is achieved by Achim Wirth for his paper “On fluctuating momentum-exchange in idealised models of air-sea interaction” (https://www.nonlin-processes-geophys.net/26/457/2019/). Achim tells us about the importance of the results achieved with this paper for investigating the energy coupling between the ocean and the atmosphere. Achim obtained his PhD at th ...[Read More]

NP Division at the General Assembly 2020

Tommaso Alberti November 20, 2019

Each year the European Geosciences Union organizes the largest European geosciences event which is the EGU General Assembly. It usually attracts over than 15000 scientists from all over the world, including both established researchers and early career scientists, who contribute to more than a half of the participants. It consists of several sessions (usually more than 500), covering a wide spectr ...[Read More]

NP Interviews: the 2019 Lewis Fry Richardson Medallist Shaun Lovejoy

Tommaso Alberti October 21, 2019

Shaun Lovejoy receiving the Lewis Fry Richardson Medal at EGU2019 from the NP Division President Stéphane Vannitsem. Credits: EGU/Foto Pfluegl

Today’s NP Interviews hosts the Lewis Fry Richardson Medallist Shaun Lovejoy. Shaun has degrees in physics from Cambridge and McGill University; he has been a McGill professor since 1985. For four decades, he has developed fractal, scaling ideas in the geosciences, contributing to advances in cascade processes, multifractals, anisotropic scale invariance, space-time multifractal modeling as well a ...[Read More]

NPG Paper of the Month: “Unravelling the spatial diversity of Indian precipitation teleconnections via a non-linear multi-scale approach”

Tommaso Alberti September 20, 2019

Schematic map of spatial diversity of Indian precipitation teleconnections at different time scales. (a) ENSO, (b) IOD, (c) NAO, (d PDO, and (e) AMO. Colors are consistent with the Indian community shown in the right figure. Presence of color in community segment indicates significant synchronization between teleconnection and Indian precipitation. Every single segment of circle shows the temporal scale. Cardinal direction has been projected in the background of each circle. (Source: J. Kurths et al., Unravelling the spatial diversity of Indian precipitation teleconnections via a non-linear multi-scale approach, Nonlin. Processes Geophys., 26, 251–266, 2019, https://www.nonlin-processes-geophys.net/26/251/2019/ . License: https://creativecommons.org/licenses/by-nc-nd/4.0/ .

Today’s we launch one of our promised activities: the NPG Paper of the Month. This month the award is achieved by Jürgen Kurths and co-authors for their paper “Unravelling the spatial diversity of Indian precipitation teleconnections via a non-linear multi-scale approach” (https://www.nonlin-processes-geophys.net/26/251/2019/). Ankit Agarwal, one of the authors of the manuscript, tells ...[Read More]