Nonlinear Processes in Geosciences

NPG Paper of the Month: “Simulation-based comparison of multivariate ensemble post-processing methods”

Tommaso Alberti September 29, 2020

Exemplary results for three variants of one of the simulation settings. Boxplots show comparisons to the standard ECC approach, with positive values indicating improvements in performance, measured in terms of two multivariate evaluation functions. The horizontal gray stripe indicates a region where differences in performance are not statistically significant with respect to the Diebold-Mariano (DM) test. License: https://doi.org/10.5194/npg-27-349-2020.

The June 2020 NPG Paper of the Month award goes to Sebastian Lerch and colleagues for their paper “Simulation-based comparison of multivariate ensemble post-processing methods” (https://doi.org/10.5194/npg-27-349-2020). Sebastian Lerch is a researcher at the Faculty of Mathematics of the Karlsruhe Institute Technology (KIT). He has a background in mathematics and statistics, his resear ...[Read More]

NPG Paper of the Month “Anthropocene climate bifurcation”

Tommaso Alberti September 24, 2020

Arctic surface temperature change projected to year 2300 (relative to year 2000 mean temperature of -28.90 °C), with linearly increasing ocean heat transport F_O . (a) With constant F_A = 104 W/m2, there is a jump in temperature for RCP 8.5 but not for the other choices of RCP. (b) The same as (a) except that in addition to increasing F_O , the atmosphere heat transport F_A also increases linearly from 104 to 129 W/m2 . Now upward transitions occur on both RCP 8.5 and 6.0, as indicated by the arrows. License: https://doi.org/10.5194/npg-27-391-2020.

The July 2020 NPG Paper of the Month award goes to Kolja Kypke, William Langford and Allan Willms, for their paper “Anthropocene climate bifurcation” (https://doi.org/10.5194/npg-27-391-2020). All three authors work at the University of Guelph, in Guelph, Ontario, Canada. William Langford did his PhD at the California Institute of Technology in 1971 under the supervision of Herbert Kel ...[Read More]

NPG Paper of the Month: “Correcting for model changes in statistical postprocessing – an approach based on response theory”

Tommaso Alberti July 22, 2020

Mean square error (MSE) evolution between the different forecasts and their correction and reality. Credits: Demaeyer, J. and Vannitsem, S.: Correcting for model changes in statistical postprocessing – an approach based on response theory, Nonlin. Processes Geophys., 27, 307–327, https://doi.org/10.5194/npg-27-307-2020, 2020.

This month the NPG Paper of the Month award is achieved by Jonathan Deameyer and Stéphane Vannitsem for their paper “Correcting for model changes in statistical postprocessing – an approach based on response theory” (https://doi.org/10.5194/npg-27-307-2020). Jonathan did his PhD in statistical mechanics at the Université Libre de Bruxelles under the supervision of Pierre Gaspard and he is currentl ...[Read More]

NPG Paper Highlight: “Baroclinic and barotropic instabilities in planetary atmospheres: energetics, equilibration and adjustment”

Peter Read July 9, 2020

License: Read, P., Kennedy, D., Lewis, N., Scolan, H., Tabataba-Vakili, F., Wang, Y., Wright, S., and Young, R.: Baroclinic and barotropic instabilities in planetary atmospheres: energetics, equilibration and adjustment, Nonlin. Processes Geophys., 27, 147–173, https://npg.copernicus.org/articles/27/147/2020/npg-27-147-2020.html, 2020.

Today’s our blog hosts a review article by the 2016 EGU Richardson medallist Peter Read, together with Daniel Kennedy, Neil Lewis, Hélène Scolan, Fachreddin Tabataba-Vakili, YixiongWang, Susie Wright, and Roland Young for the special issue of NPG celebrating 100 years of IUGG (https://npg.copernicus.org/articles/27/147/2020/npg-27-147-2020.html). One of the great achievements of the past 100 ...[Read More]