Lehre

Ich biete ein Fortgeschrittenenseminar zu verschiedenen Themen an der Universität Hamburg an (siehe unten). Die Vorlesungen beziehen sich in der Regel auf meine Forschungsinteressen, die immer mit Wolken und Klimaprozessen in Verbindung stehen. Jedes Jahr im Sommersemester biete ich einen Blockkurs mit dem Titel „An introduction to Earth System Modelling“ an.

Introduction to Earth System Modelling – Summer semester (with Victor Brovkin)

In this course we introduce the main components of the Earth system, components that regulate matter and energy flows in ways that determine Earth’s climate. Based on an understanding of the essential contributions of these varied components the students develop and explore the dynamics of the simplest possible earth-system model.

The Trades – Winter 2020/2021

The Trades are one of the major wind systems of the general circulation of Earth’s atmosphere, and as such play an important role in the climate system. In this courseI will describe what we observe about the trade winds, the theories we use to interpret or explain these observations, and the puzzles that remain.

Global Circulation and Climate - Winter 2019/2020

The course will explore the interactions between circulation and climate through through the perspective of selected and long-standing biases in Earth System Models. Six different biases are selected (syllabus), and used to develop the conceptual foundations of climate modelling.  The class is co-taught with Hauke Schmidt. 

T1: Stratocumulus (slides); T2: Tropical Thermal structure (slides); T3: Deep Convection and Tropical SSTs (slides); T4: The Meridional Overturning Circulation; T5: Stratospheric temperature bias (slides)

 

Principles of active radar and lidar remote sensing - Winter 2017/2018

The course will introduce the principles of active radar and lidar remote sensing, with a focus on clouds, water vapor and aerosol. Synergistic uses of radar and lidar so as to infer cloud microphysical properties will also be introduced. An effort will be made to provide students with hands on experience with radar and lidar data and data processing.

The Atlantic ITCZ - Winter 2016/2017

The lectures will review basic concepts in tropical dynamics (moist thermodynamics, convective parameterization basics, weak-temperature gradient approximations, equatorial waves) and then proceed to circulation systems (MJO, Hadley/Walker Cells, land=sea circulations, Monsoons, and maybe even a tropical cyclone appetizer). It will be a mix of reading selected papers from the literature and prepared lectures.

Clouds, Circulation and Climate Sensitivity - Winter 2014/2015

This class well develop and explore the Four Questions (of the WCRP Grand Science Challenge on Clouds Circulation and Climate Sensitivity) : (i) What controls the position, strength and variability of storm tracks? (ii) What controls the position, strength and variability of the tropical rain belts? (iii) What role does convection play in cloud feedbacks? (iv) What role does convective aggregation play in climate?

A Climate System View of Radiative Transfer - Winter 2013/2014

These lectures explores how basic concepts in radiative transfer, like Wien's displacement law, the absorption spectrum of simple molecules, line broadening and continnum emission, help set basic properties of Earth's atmosphere. Radiative-convective equilibirum is introduced and developed as a basis for exploring the forcing-feedback-response framework, and related diagnostic tools, for understanding climate change. A particular focus will be on the interactions of cloud and radiation and and elucidation of their ultimate importance for basic properties of the climate system. 

A Climate System View of Clouds and Convection - Winter 2011/2012

These lectures explore the climate and climate dynamics of cloudy atmospheres. Different ways clouds and convective processes contribute to the state and changes in the climate system are reviewed. Topics include: the energy budgets of the top of the atmosphere and the surface, and the effects of clouds on these budgets, and controls on surface temperature. Concepts related to cloud and aerosol effects, forcing, feedbacks, and adjustments to climate perturbations will also be introduced and developed.
Lectures notes | Slides

Cloud (and Aerosol) Physics - Winter 2010/2011

These lectures present a description of the thermodynamic and microphysical laws that govern the microphysical structure of clouds and precipitation. In addition to reviewing the elements of cloud (and aerosol) microphysics this course reviews the different types of models that have been developed to describe such processes; basic measurement techniques, including remote sensing; and some of the important outstanding questions.  The course is taught at an advanced undergraduate level and lectures are given in German.
Lectures notes

Atmospheric Moist Convection - Winter 2009/2010

This course (15 lectures of about 2 hrs each) will give an introduction and overview to the structure and theory of atmospheric moist convection. My focus will be to develop our theoretical understanding of this class of atmospheric phenomena, particularly as it relates to the structure and sensitivity of the climate system. The intended audience is Masters or PhD level students, certainly those that have a basic understanding of meteorological concepts and atmospheric thermodynamics. A goal will be to develop the basis for students to pursue PhD research on interesting questions pertaining to atmospheric moist convection and its role in the climate system.
Slides