University of Bonn

My research work can be accessed in three ways. 1) A list with various scientific themes, with pdf-articles and often color examples and program codes (below are the five main themes). 2) There is a chronological list of articles. 3) Short informal texts of a more general nature or with preliminary ideas are in the section: Essays on science.

Adaptive parameterisations

Adaptive parameterisation schemes enable more physical parameterisations by splitting the computation in a more physical calculation and an adaptive (statistical) generalisation.

Surrogate clouds

Surrogate cloud fields have certain (statistical) properties of real cloud fields. These can be measured properties or theoretical ones.

Homogenisation of climate records

A benchmark dataset to test homogenisation algorithms.

Radar scattering due to cloud structures

Bragg scatter due to cloud water structures in stead of humidity structures.

more research themes ...

PhD position on adaptive parameterisations

August 2009. The German weather service (DWD) is sponsoring new PhD position on adaptive radiative transfer in the COSMO model. Please apply before September 13th. However, the position will remain open until filled.

Article adaptive parameterisations

June 2009. There is now also an article on two adaptive radiative transfer parameterisations for the Unified Model of the UK Met Office by Manners et al.

Testing homogenisation algorithms

June 2009. The final version of the benchmark dataset for testing homogenisation algorithms is finished and available for download. This dataset contains cross-correlated multivariate surrogate data with known artificial inhomogeneities.

Downscaling 3D clouds for radiative transfer

February 2009. A manuscript (pdf | doc) describing a new algorithm for the downscaling of 3-dimensional cloud fields has been submitted to the Quarterly Journal. The algorithm is applied to clouds from large eddy simulations and scales the clouds down to scales needed for radiative transfer calculations. Comment are welcome.

 

Cloud research e-mail list

An e-mail distribution list on cloud research and climate.

Surrogate clouds and Transregio 32

I am currently working on a DFG-project on surrogate clouds and in the Transregio 32 on structure and exchange processes between the ground, vegetation and atmosphere.

4D-clouds project

My last project on cloud structure and radiation.