I regularly offer courses at the University of Hamburg. My lectures focus on research topics related to clouds and climate processes. The lectures on atmospheric moist convection explores macroscopic, or macrophysical, descriptions of moist convection; cloud physics presents a microphysical description. My lectures on clouds and climate processes explores the role of moist convection in the climate system more broadly.

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:

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. winter semester 2017/2018


The Atlantic ITCZ:

An understanding of the processes and dynamics of the ITCZ over the summertime North Atlantic. How satellite and in situ data can be combined to understand the structure of the summertime circulation in the vicinity of the north Atlantic.
Using field measurements from the NARVAL-II campaign as impetus the course will review the structure of the summer-time Atlantic ITCZ.  Satellite remote sensing data sets will be evaluated in light of the modelling and measurements. Student contributions to the analysis of satellite and in situ data, as well as of model output, will be integrated into a scientific publication. winter semester 2016/2017

Tropical  Dynamics:

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. winter semester 2015/2016



Grand Science Challenge on Clouds, Circulation and Climate Sensitivity:

The World Climate Research Programme identified four grand challenge questions, for which coordinated research efforts may help substantially advance the field in a five to ten year timeframe. The questions are: (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? After a first introductory lecture, each question will be addressed through paper discussions in three 100 minute lectures. Discussion will be in English. winter semester 2014/2015

A Climate System View of Radiative Transfer:

These lectures explore how the radiative transfer affects the climate system. A basic idea of the mechanics of radiative transport, and atmospheric thermodynamics is assumed. Covered in the class are 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. The structure of an Earth like atmosphere in radiative and radiative-convective equilibirum. These models are developed as a basis for exploring the forcing-feedback-response framework, and related diagnostic tools, for understanding climate change. A particular focus on the interactions of cloud and radiation and and elucidation of their ultimate importance for basic properties of the climate system. The course is taught at the masters level but is also appropriate for advanced undergraduate (bachelor students). Lectures are in English. winter semester 2013/2014


 A Climate System View of Clouds and Convection:

These lectures are on the climate and climate dynamics of cloudy atmospheres. The course reviews the different ways clouds and convective processes contribute to the state and changes in the climate system. The energy budgets of the top of the atmosphere and the surface will be presented, and the effects of clouds on the equilibrium surface temperature will be reviewed. Concepts related to cloud and aerosol effects, forcing, feedbacks, and adjustments to climate perturbations will also be introduced and developed. Our current understanding of cloud feedback processes will be developed. The course is taught at the masters level, but is also appropriate for advanced undergraduates (bachelor students). Lectures are given in German. winter semester 2011/2012


Cloud (and Aerosol) Physics:


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. winter semester 2010/2011


Atmospheric Moist Convection: 

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. winter semester 2009/2010