Während der StuMeTa 2024 könnt ihr euch in einem spannenden Vortragsprogramm zum aktuellen Forschungsstand der Leipziger Meteorologie informieren. Alle Vorträge finden in englischer Sprache statt und haben eine Länge von ca. 30 Minuten. Danach bleibt Zeit, um eure Fragen zu beantworten.
During StuMeTa 2024, you can find out about the current state of research in Leipzig meteorology in an exciting programme of lectures. All our lectures will be held in English and have a length of approx. 30 minutes. Then there will be time to answer your questions.
Donerstag/Thursday 9:00-9:45 Uhr:
Manfred Wendisch – Arctic Climate Changes – Why should we care?
The near-surface air temperature in the Arctic rises 2 to 4 times faster than on the rest of the globe. In addition, the sea ice concentration in the Arctic is drastically decreasing, especially in September of each year. These and other currently ongoing changes in key Arctic climate parameters are clear indications of the phenomenon of Arctic amplification. The presentation will discuss specific processes and feedback mechanisms that contribute to Arctic amplification.
Donnerstag/Thursday 9:45-10:30 Uhr
Johannes Quaas – Breathing Nature
The Institute for Meteorology currently builds up a new research topic on the connection between biodiversity and climate change. The presentation will explain what is planned, who else contributes, what relevant research questions are and also how this connects to teaching. Some recent results are shown.
Donnerstag/Thursday 11:00-11:45 Uhr
Benedikt Gast – Remote sensing of aerosols and clouds at TROPOS and introduction to the fluorescence lidar technique
The Remote Sensing Department (RSD) at the Leibniz Institute for Tropospheric Research (TROPOS) focuses on the investigation of the optical and physical properties of aerosols and clouds from ground and space. Our research activities include the development and application of measuring instruments for remote sensing, as well as our contributions to the latest satellite missions, such as Aeolus and EarthCARE.
Furthermore, I’ll introduce the fluorescence lidar technique that emerged in the last few years. The ultraviolet part of the laser radiation, which is emitted into the atmosphere by lidar, induces a fluorescence emission at certain types of biogenic aerosol particles. The technical basics and possible applications of laser-induced aerosol fluorescence measurements will be presented, as well as some recent results.
Donnerstag/Thursday 11:45-12:30 Uhr
Sophie Rosenburg – Working group „Atmospheric Radiation“ – Observing, modelling and analyzing radiative processes
This talk will introduce the working group “Atmospheric Radiation” at LIM. With a focus on airborne measurement techniques, we are analyzing the role of clouds and Earth surface characteristics in the radiative energy budget, especially in the context of Arctic amplification. The talk will give a broad overview of our research objectives and will give some insights into specific projects.
Donnerstag/Thursday 14:00-14:45 Uhr
Nina Marhendl – Observing clouds and precipitation from near and far – introducing the LIM working groups “RemSensArctic” and “drOPS”
The research profiles of the working groups “Remote Sensing and the Arctic climate system” (RemSensArctic) and “Cloud and precipitation Observations for Process Studies” (drOPS) are complementary. Both focus on observations of the atmosphere, clouds and precipitation, heavily rely on remote sensing instruments and conduct research in remote locations – or at our doorstep. While the RemSensArctic group combines different active and passive (ground-based) remote sensing instruments, drOPS combines remote sensing with in situ instruments like the specially developed Video In Situ Snowfall (VISSS) camera. Here, I want to give an overview of current research projects, which cover locations from the southernmost tip of South America to the high Arctic, and topics from ice crystals to insects.
Samstag/Saturday 9:00-9:45 Uhr
Andreas Tilgner & Erik Hoffmann – Tropospheric Multiphase Chemistry Investigations at TROPOS-ACD
The troposphere is a complex environment where physical and chemical processes occur simultaneously. Tropospheric multiphase chemistry defines chemical processes occurring within and between the atmospheric gas and aqueous (wet particles, fog and cloud droplets) phase. It can substantially alter the physico-chemical composition of aerosol particles and the surrounding gas phase on all spatial scales up to the global scale. Hence, tropospheric multiphase processes are crucial for the tropospheric lifetime of air pollutants and greenhouse gases, deposition of trace gases/nutrients to terrestrial and oceanic ecosystems, visibility, air quality, climate, and human health. However, the scientific knowledge of complex multiphase chemistry processes is still quite restricted. Therefore, multiphase chemical processes occurring in the troposphere are deeply investigated at TROPOS-ACD by means of field measurements at various sites, detailed laboratory experiments and complex multiphase chemistry modeling.
Within this presentation, first, a brief introduction into the topic of tropospheric multiphase chemistry is given. Subsequently, an overview on the different research facilities at TROPOS-ACD is presented. Then, to two specific research investigations are shown in the main part focusing on key multiphase chemistry processes (1) under polluted continental and (2) pristine marine conditions.
The first research study presents investigations on the unexpected formation of hydrogen peroxide (H2O2) under Chinese winter haze conditions and its role in explaining the formation of sulfate aerosols. The results of field measurements in China are presented together with subsequent laboratory studies in the TROPOS aerosol-chamber and accompanied numerical model investigations performed at TROPOS.
Secondly, advanced model investigations related to the multiphase chemistry of dimethyl sulfide, the largest natural sulfur source, under marine pristine conditions will be presented. Moreover, its importance for the formation of non-sea-salt sulfate (nss-SO42-) aerosol concentration and the number of marine CCNs is outlined together with its atmospheric chemistry and climate implications.
Finally, an outlook on near-future developments in the study of atmospheric multiphase chemistry is given.
Samstag/Saturday 9:45-10:30 Uhr
Roland Schrödner – Modeling for all, all for modeling – Application of
aerosol-chemistry models on different scales
Samstag/Saturday 11:15-12:00 Uhr
Sebastian Sippel – Record-shattering heat waves: Understanding, attribution, and modeling
As our planet continues to warm, we are witnessing heat waves that not only break historical records but do so by unprecedented margins. This talk explores how and why these extreme weather events occur physically and statistically, using recent observations and climate models.
We will delve into examples like the 2021 Pacific Northwest heatwave, which has shattered the long-standing historical temperature record by a margin of almost 5°C in June 2021. We examine whether climate models could anticipate such events and their physical drivers. Moreover, we will briefly discuss record statistics as a tool to predict and understand the behaviour of the distribution of records mathematically.
By understanding these extremes physically and statistically, we aim to prepare better for future events that could affect other regions. We hope that by combining these different scientific approaches and interpretation will help us anticipate and mitigate the effects of extraordinary heat waves in the future.
Samstag/Saturday 16:00-16:45 Uhr
Matthias Tesche – Investigation of aerosol-cloud interactions from
satellite observations
The focus will be on the combination of different satellite perspectives, the tracking of individual clouds, the determination of the concentration of cloud-relevant aerosols, as well as the meaningful combination of the different data sets.
Samstag/Saturday 16:45-17:30 Uhr
Karsten Haustein – Working group „Clouds and Global Climate”
We introduce the groups most recent science activities and endeavours, we give you an overview of our joint outreach activities and the impact it had, as well as a glimpse of what social life in the group is like beyond the daily research grind. Activities include an icy field campaign in Norway, outdoor fun at a glacier, a journey to a 325 m tall tower in the Amazon rainforest, and a view from the equally Auwald crane here in Leipzig. We will show you exciting research results from the atmosphere above the Arctic, satellite images from above polluted land areas and the latest and greatest on the frontlines of extreme weather event attribution. On top, we share our experiences of living and studying abroad, we will tell you why everyone ends up in Oxford, and we do reveal the secret of how to spot northern lights. You see clips of us being on TV, you get to know how our outreach efforts literally spread all over Leipzig, and how we help local decision makers to prepare the city for the next hottest heat wave. Last, but definitely not least, we share our journey into raising awareness for mental health and issues related to fairness, equality, racism and intersectionality.