Nonlinear Processes in Geosciences

Archives / 2020 / February

The 2020 extra-tropical monster cyclones and their (possible) relations with climate change

Davide Faranda February 18, 2020

The satellite image shows storm Uta (name chosen by the Freie University in Berlin) an incredibly large vortex spiraling close to Iceland.

On February 9th, a British Airways Boeing 747 landed in London Heathrow airport just four hours and 56 minutes after its take-off in JFK, New York, setting the shortest flight-time for non-supersonic jets over this route. The jumbo jet took advantage of the fast upper-tropospheric winds associated with an exceptionally strong jet-stream which created tail winds of about 400km/h. Over the United Ki ...[Read More]

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]