Seminar Series on Atmospheric Dynamics and Predictability

Group seminars

Our weekly group seminars for the next winter semester will start on 28 October. The seminars will generally take place in Zoom, on each Tuesday, at 14:15 CET. There will be exceptions to accomodate overseas speakers, see the schedule below.

Wintersemester 2025

Oct 28, 14:15	Katharina Holube	Univ. Hamburg	Influences of dynamical and diabatic processes on atmospheric Kelvin waves
Nov 4, 14:15	Juntian Chen	Univ. Hamburg
Nov 18, 14:15	Discussion of ML methods		Based on Chase et al. 2022 a+b
Nov 25, 14:15	Sándor Maho	Univ. Hamburg
Dec 2, 14:15	Nedjeljka Žagar	Univ. Hamburg
Dec 9, 14:15	Ole Merkes	Univ. Hamburg
Dec 16, 14:15	Larissa Schaumburg	Univ. Hamburg
Jan 6, 14:15	Finn Rolf	Univ. Hamburg
Jan 13, 14:15	Chengyuan Zhang	Univ. Hamburg
Jan 20, 14:15	Marie Kermer	Univ. Hamburg
Jan 27, 14:15	Xintong Qiu	Univ. Hamburg

Spring/Summer 2024

Apr 9, 14:15	K.H., C.W., S.M., Y-B.Z.	Univ. Hamburg	Elevator pitch EGU seminars
Apr 16, 14:15	Prof. Nedjeljka Žagar	Univ. Hamburg	Non-divergent flows on the sphere
Apr 23, 14:15	Katharina Holube	Univ. Hamburg	Temporal variability of waves in the tropical and subtropical upper troposphere
Apr 30, 14:15	Chen Wang	Univ. Hamburg	Benefits of initializing equatorial waves on accuracy of extratropical forecasts
Mai 7, 14:15	Peishan Chen	Univ. Hamburg	Decomposition of the global circulation related to the atmospheric convection over western North Pacific to different waves
May 14, 14:15	Dr. Robin Pilch Kedzierski	Univ. Hamburg	Aeolus assimilation effects on equatorial waves and the QBO in the ECMWF system
May 28, 14:15	Sándor Mahó	Univ. Hamburg	Barotropic instability in the QBO region and its effect on mixed Rossby-gravity wave growth
Jun 4, 14:15	Valentino Neduhal	Univ. Hamburg	Quantification of the Vertical Momentum Fluxes in the Tropics and forcing of the QBO
Jun 11, 14:15	João B. Cruz	University of Lisbon	Local Identification of Equatorial Waves
Jun 18, 14:15	Katarina Kosovelj	University of Ljubljana, Slovenia	Indices of Walker circulation strength
Jul 2, 14:15	N.N.
Jul 9, 14:15	Joshua Lee	Meteorological Service Singapore	Variable-dependent and selective multivariate localization for ensemble-variational data assimilation in the tropics

Wintersemester 2023

Oct 10, 10:15	Svenja Christ	Univ. Hamburg	Master Thesis Defence: The influence of the sea surface temperature gradient in the Gulf Stream region on cyclone development, warm conveyor belt ascent, and downstream ridge formation during the European winter 'heat wave' in February 2019
Oct 24, 14:15	Peishan Chen	Univ. Hamburg	The summer atmospheric convection variability over the tropical western North Pacific independent of and dependent on the preceding winter ENSO
Nov 7, 14:15	Robin Pilch Kedzierski	Univ. Hamburg	Cold-point tropopause representation in reanalyses
Nov 14, 16:00	Yuan-Ming Cheng	NOAA	Two Extratropical Pathways to Forcing Tropical Convective Disturbances
Nov 21, 14:15	N.N.	Univ. Hamburg	T.N.
Nov 28, 14:15	Inna Polichtchouk	ECMWF, Reading, UK	Resolved gravity waves in km-scale models: A stratospheric perspective
Dec 5, 16:00	Bradley Kumm	University of Wisconsin-Madison	Adding Moisture into the MODES Framework
Dec 12, 14:15	Yuan-Bing Zhao	Univ. Hamburg	Warm Pool: Modulating Atmospheric Responses to Equatorial SST Perturbations
Dec 19, 15:00	Hamid Pahlavan	University of Washington	The QBO Dynamics and Gravity Waves Characteristics as Seen in ERA5 Reanalysis
Jan 2, 14:15	N.N.	Univ. Hamburg	T.N.
Jan 9, 14:15	Katharina Holube	Univ. Hamburg	Energy transfers between normal modes in a spherical rotating shallow-water model
Jan 16, 14:15	Sandor Maho	Univ. Hamburg	Scale selection of mixed Rossby-gravity waves by wave-mean flow interactions
Jan 23, 14:15	Valentino Neduhal	Univ. Hamburg	Gray-Zone Vertical Momentum Fluxes in the Tropics
Jan 30, 14:15	Chen Wang	Univ. Hamburg	The influence of the tropics on extra-tropical predictions
Feb 6, 14:15	N.N.	Univ. Hamburg	T.N.

Spring/Summer 2023

Apr 4, 15:15, Bundesstr. 53, Room 022/023	Prof. Dr. Martin Claußen	MPI-M and CEN Univ. Hamburg	Multiple equilibria and rapid transitions in complex Earth System models - Tipping in ESMs
Apr 11, 14:00	Prof. Dr. Martin Heima nn	Max Planck Institute for Biogeochemistry, Jena	Climate Science born in Hamburg: Incorporating Carbon into Climate Models
Apr 12, 13:30, Bundesstr. 53, Room 022/023	Prof. Dr. Peter Knippertz	Karlsruhe Institute of Technology	How to improve rainfall forecasts in the tropics?
Apr 18, 14:00, Bundesstr. 53, Room 022/023	Prof. Dr. Robert Sausen	DLR - Institute of Atmospheric Physics - Oberpfaffenhofen	Climate Science born in Hamburg: Anomaly coupling in climate modelling
Apr 25, 14:00, Bundesstr. 53, Room 022/023	Dr. Eduardo Zorita	Helmholtz-Zentrum Hereon	How can you be sure that your statistical model is correct ? Using climate simulations and pseudo-proxies as a virtual laboratory
May 2, 14:15	Dr. Richard Blender	Univ. Hamburg	Madden-Julian Oscillation described as a Nonlinear Burgers Kink in the Meridional Vorticity Equation
Mai 9, 14:15	Alexia Karwat	Univ. Hamburg	Extratropical cyclones in a warmer climate
May 16, 14:15	Svenja Christ	Univ. Hamburg	The influence of the sea surface temperature gradient in the Gulf stream region on cyclone development and warm conveyor belt ascent during the European winter "heat wave" in February 2019
May 30	N.N.	Univ. Hamburg	T.N.
Jun 6	Dr. Gui-Ying Yang	National Centre for Atmospheric Science Department of Meteorology, University of Reading	Seasonal cycle and ENSO-related variation of equatorial waves in ERA5 and GloSea5
Jun 13, 14:15	Chen Wang	Univ. Hamburg	The benefits of wind-mass coupled data assimilation for tropical observations on extra-tropical forecasts
Jun 20, 14:15	Sándor Mahó	Univ. Hamburg	Mixed Rossby-gravity wave generation by wave-mean flow interactions in the atmosphere
Jun 27, 14:15	Valentino Neduhal	Univ. Hamburg	Vertical momentum fluxes of equatorial waves
Jul 4, 14:15	Katharina Holube	Univ. Hamburg	Excitation of equatorial waves by subtropical wave-wave and wave-mean flow interactions
Jul 4, 16:15	Prof. Dr. Francesco Fedele	School of Civil and Environmental Engineering , Georgia Institute of Technology, Atlanta, USA	Ocean rogue waves and extremes of the Lorenz-2005 model

Wintersemester 2022/23

Oct 25	Dr. Nazmi Burak Budanur	Max-Planck-Institute for the Physics of Complex Systems, Dresden	Scale-dependent Error Growth in Navier-Stokes Simulations
special TRR seminar Oct 27, 15:15	Dr. Nazmi Burak Budanur	Max-Planck-Institute for the Physics of Complex Systems, Dresden	Reduced-order modeling of turbulent flows in terms of coherent structures
Nov 1	Prof. Dr. Jin-Song v. Storch	Max-Planck-Institute f. Meteorology, Hamburg	A new consideration of equilibrium fluctuations and its link to Hasselmann’s stochastic climate model
Nov 8	Alexia Karwat	Univ. Hamburg	Extra-Tropical Cyclone Clustering in Recent and Future Winter Climates: Insights from ERA5 and CESM2-LE
Nov 15	Dr. Richard Blender	Univ. Hamburg	Random Moving Surfaces: A Summary of Longuet-Higgins (1957)
Nov 22	Dr. Rebecca Emerton	ECMWF, Reading, UK	“Predicting the Unprecedented” – evaluating ECMWF’s forecasts of extreme heatwaves
Nov 29	Dr. Frank Lunkeit	Univ. Hamburg	A mixed Rossby-gravity wave climatology based on ERA5 re-analyses and three-dimensional normal mode decomposition
Dec 6	Paolo Andreozzi	Univ. Hamburg	Properties of Kelvin Waves forecast errors in the ECMWF deterministic forecasts
Dec 13	Valentino Neduhal	Univ. Hamburg	Decomposition of the horizontal divergence and its spectra into Rossby and non-Rossby components
Dez 20	Lanqian Li	Univ. Hamburg	Comparison of temperature and wind observations in the tropics in a perfect-model, global EnKF data assimilation system
Jan 10	Chen Wang	Univ. Hamburg	cancelled due to presenter’s sickness !
Jan 17	Sandor Maho	Univ. Hamburg	Barotropic instability generated MRG waves and their potential relation to QBO
Jan 24	Dr. Yuan-Bing Zhao	Univ. Hamburg	Geographical dependence of multidecadal mean impacts of SST bias on the simulated atmospheric circulation and spatio-temporal variability
Jan 31	Hairu Ding	Univ. Hamburg	The role of subtropical highs regarding to the low cloud formation
Feb 7	Katharina Holube	Univ. Hamburg	Subtropical influences on the equatorial Kelvin wave
Feb 14	Chen Wang	Univ. Hamburg	Initializing equatorial waves and its benefits on extra-tropical forecasts

Spring/Summer 2022

Apr 05, 14:15	Prof. Dr. Nedjeljka Žagar, Dr. Richard Blender	Univ. Hamburg	Introduction to the Seminar
Apr 12, 14:15	Katharina Holube	Univ. Hamburg	An intermediate complexity model of moist tropical dynamics
Apr 19, 14:15	Prof. Dr. Hans von Storch	Univ. Hamburg	Eigenvectors and me
Apr 26, 14:15	Valentino Neduhal	Univ. Hamburg	Modal decomposition of the vertical momentum fluxes
May 03, 14:15	Dr. Yuan-Bing Zhao	Univ. Hamburg	Bias teleconnection and the associated atmospheric variability originated in erroneous sea surface temperature in equatorial Indian ocean
May 10, 14:15	Chen Wang	Univ. Hamburg	Preliminary results of predictability experiments with TIGAR
May 17, 14:15	Iana Strigunova	Univ. Hamburg	Northern Hemisphere Stationary Waves in a Changing Climate (review)
May 31, 14:15	Cristian Febre	Univ. Hamburg	Influence of the South American Low-Level Jet on precipitation over the South-Western Andes of Peru
Jun 07, 14:15	Paolo Andreozzi	Univ. Hamburg	How predictable are the equatorial Kelvin waves in ECMWF deterministic system?
Jun 14, 14:15	Mailin Samland	Univ. Hamburg	Insights into Hurricane Isabel
Jun 21, 14:15	Sándor Mahó	Univ. Hamburg	Dynamics of mixed Rossby - gravity waves in the tropical atmosphere: TIGAR simulations with realistic background flows
Jun 28, 14:15	Verena Jung	Univ. Hamburg	On scale interactions and climate change in a Lorenz-2005 model
Jul 05, 14:15	Katharina Holube	Univ. Hamburg	The Kelvin wave and the Madden-Julian Oscillation
Jul 12, 14:15	Lanqian Li	Univ. Hamburg	Information content of the mass-field and wind-field information in a perfect-model global ensemble Kalman filter data assimilation system

Special lectures by Prof. Dr. Hans von Storch in winter 2022

Feb 8, 14:15	The science of Klaus Hasselmann
Feb 15, 14:15	Noise - nuisance and constitutive
Feb 22, 14:15	Detection and attribution of climate change
Mar 8, 14:15	Concepts of downscaling

Missed the talk? Please watch it later here.

Spring/Summer 2021

Apr 06	Prof. Dr. Nedjeljka Žagar	Univ. Hamburg	Wavenumber and frequency filtering of the equatorial Kelvin wave
Apr 13	Dr. Magdalena A. Balmaseda	ECMWF, UK	Scientific concepts underpinning the design of probabilistic forecasting systems for weather and climate
Apr 20, 4:00pm	Dr. Joe Tribbia	NCAR, CO, USA	Predictability: Past Present and Future
Apr 27	Dr. Michael Denhard	DWD, Germany	NWP and Data Assimilation developments at Deutscher Wetterdienst
May 04	Dr. Tsz Yan Leung	University of Reading, UK	Atmospheric predictability: impact of the mesoscale k^(-5/3) range
May 11, 4:00pm	Dr. Jeff Anderson	NCAR, CO, USA	Building State-of-the-Art Forecast Systems with the Ensemble Kalman Filter
May 18	Prof. Dr. Heikki J. Järvinen	University of Helsinki, Finland	Continuous Data Assimilation in the ECMWF IFS CY46
May 25	Prof. Dr. Istvan Szunyogh	Texas A&M, TX, USA	Machine-Learning-Assisted Numerical Modeling of the Atmosphere?
Jun 01	Prof. Dr. Hiroshi L. Tanaka	University of Tsukuba, Japan	A Possible Long Predictability of the Barotropic Component of the Atmosphere
Jun 08	Dr. Xiaoxu Tian	University of Maryland, College Park, USA	Validation of a Prototype Global 4D-Var Data Assimilation System for the MPAS-Atmosphere Model
Jun 15	Iana Strigunova	Univ. Hamburg	Modal statistics of atmospheric circulation
Jun 22	Valentino Neduhal	Univ. Hamburg	Paper review: The Horizontal Spectrum of Vertical Velocities near the Tropopause from Global to Gravity Wave Scale
Jun 29	Jonas Pfau	Univ. Hamburg	Compound Atmospheric Events Leading to Low Renewable Energy Supply
Jul 06	Alexia Karwat	Univ. Hamburg	Trend analysis of North Atlantic and North Pacific cyclones in long-term ERA5 data series

Winter 2020/21

Nov 03	Comfort Agyen Donkor	Univ. Hamburg	Seasonal Cycle of Precipitation in Equatorial West Africa and Atmospheric Circulation Structures
Nov 10	Julia Menken	Univ. Hamburg	Impact of Moisture on the Propagation of Inertio-Gravity Waves in the Tropics
Nov 17	Iana Strigunova	Univ. Hamburg	Extreme weather events in early summer 2018 connected by a recurrent hemispheric wave-7 pattern
Nov 24	Dr. Paolo de Luca	VU Amsterdam	Bridging the gap between theory and reality in weather and climate extremes
Dec 01	Gözde Özden	Univ. Hamburg	Effects of varying shape of the initial perturbation on the geostrophic adjustment experiment
Dec 08	Alexia Karwat	Univ. Hamburg	Cyclone tracking in ERA5 (1950-2019) and the future of mid-latitude storms
Dec 15	Prof. Dr. Nikki Vercauteren	FU Berlin	Energy transfers in turbulent flows: a coarse-graining approach
Jan 05	Alex Rischmuller	Univ. Hamburg	A Probabilistic Assessment of Extreme Precipitation in the Eastern Mediterranean
Jan 12	Dr. Georgios Margazoglou	Univ. of Reading	Dynamical Landscape and Multistability of a Climate Model
Jan 19	Herminia Torello	Univ. Hamburg	Drought impacts in Spain, their links to meteorological drought indicators and predictability
Jan 26	Yuan-Bing Zhao	Nanjing Institute of Meteorology	The eddy-background flow interaction and the underlying energy transfer processes in the North Pacific storm track
Jan 26 16:00-16:45	Mozhgan Amiramjadi	University of Tehran	Developments on Atmospheric Gravity Waves parameterization
Feb 09	Qiyun Ma	Univ. Hamburg	The Lorenz Energy Cycle: Trends and the Impact of Modes of Climate Variability
Feb 16	Dr. Žiga Zaplotnik	Univ. of Ljubljana	Trends and long-term variability of Hadley circulation in ERA5 reanalysis