Nonlinear Processes in Geosciences

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

Tommaso Alberti February 3, 2020

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]

Why Bushfires raged out of control across Australia?

Davide Faranda January 22, 2020

Australian wildfires have burned an impressively large surface and caused the death of at least 24 citizens as well as of numerous animals. This immense disaster raises questions about its linkage with climate change, the possibility of controlling these events and the future of Australian wildlife ecosystems. While the first question will be addressed by soon to come attribution studies, and the ...[Read More]

Medicanes, thunderstorms and Acqua Alta in Venice: what is the role of climate change?

Davide Faranda November 27, 2019

A Mediterranean cyclone, high tides and climate change: these three ingredients made the 12/11/2019 acqua alta event in Venice exceptional. This combination of causes determined what climate scientists define as a compound extreme event, a non-linear mix of factors which led to several and connected extreme weather phenomena in the Mediterranean area. Let us start by the analysis of the atmospheri ...[Read More]

NP Interviews: the AGU 2019 Turcotte awardee Vera Melinda Galfi

Christian Franzke November 25, 2019

Before pursuing a scientific career, Melinda studied economics and worked in the field for several years. Her scientific career took place until now in Hamburg, Germany, where she completed both her undergraduate and graduate studies in meteorology. Melinda finished her PhD in 2018 under the supervision of Valerio Lucarini, studying extreme events in chaotic atmospheric models. She received the 20 ...[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

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]

After Lorenzo and Ophelia, should we prepare European coasts for tropical storms and hurricanes?

Davide Faranda October 15, 2019

Autumn is hurricane season in the north tropics and indeed 2019 does not make exception from this point of view. After Dorian hitting Bahamas and North Carolina, the American National Hurricane Center named Lorenzo a tropical depression originating near Capo Verde. On September 25th Lorenzo became a category 1 hurricane, according to the Saffir-Simpson scale. This scale categorizes the hurricanes ...[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.

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]

Abrupt Warming could bring our planet a “Hothouse Earth” with catastrophic consequences for our economy and society

Davide Faranda September 9, 2019

Most of us have enjoyed swings in childhood. Some have even tried to swing faster and make a full 360 degrees’ loop. Those who succeeded had a very strange feeling of not being able to predict whether, increasing the energy of the swing, the transition from normal oscillations and 360 loops would happen. Indeed, there is an energy threshold such that the swing goes from oscillations to full loops ...[Read More]

Workshop report: Mathematics of the Economy and Climate

Anna von der Heydt September 9, 2019

Just before the summer a group of about 40 scientists gathered in an old Monastery in the Netherlands (Kontakt der Kontinenten, Soesterberg) for a rather special collaborative workshop entitled “Mathematics of the economy and climate”. Mathematicians, climate scientists and economists – a group of scientists that normally does not mix and are rather unfamiliar with each other’s researc ...[Read More]