My name is Laurens Ganzeveld and work as Assistant professor in the chair group Earth System Sciences - Climate Change of the department of Environmental Sciences at Wageningen University, Netherlands ESS-CC and after having spent 5 years at the Max Planck Institute for Chemistry, Mainz, Germany, I am an affiliate of this institute.
The teaching in the ESS group involves lecturing on the MSc course "Earth system modelling" and "Principles of Earth and Ecosystem Science" and the BSc course "System Earth: analysis at the regional to global scales".
Research interests
My main interest is the role of surface reactive trace gas and aerosol exchanges in atmospheric chemistry and climate. This includes:
- Dry deposition process
- Biogenic emissions
- In-canopy interactions
- Role of micrometeorology and hydrology in atmospheric chemistry
- Cryosphere-atmosphere and ocean-atmosphere exchanges
- Impact of land cover and land use changes in atmospheric chemistry and climate
- Extensive evaluation of surface exchanges using field observations and 1-D and 3-D models
These themes all fit in "quite" well with the research foci of IGBP's intergrated Land Ecosystem Atmosphere Processes Study: iLEAPS, where I contribute being an SSC member.
The initial focus of my work during my Phd has been incorporation of dry deposition parameterizations in large scale atmospheric chemistry models. To see the model resolved annual cycles in the global distribution dry deposition velocities [Vd] of ozone and sulfur dioxide you can watch two animations:
- O3 dry deposition velocity (soon available)
- SO2 dry deposition velocity (soon available)
The dry deposition schemes, that also include explicit simulations of aerosol dry deposition, has been incorporated within various global scale models such a the chemistry-climate model ECHAM4, in the new ECHAM5/MESSy system but also in models such as the chemistry transport model TM3 Anybody who is interested in the model code can contact me to get access to it.
Figure 1: Chemical cycling of trace gases within a forest canopy. From: Jacob D. J., and P. S. Bakwin, Cycling of NOx in tropical forest canopies, In: Microbial production and consumption of greenhouse gases: methane, nitrogen oxides and halomethanes, eds. J. E. Rogers and W. B. Whitman, 237-253, American Society of Microbiology, 1991
I have also focussed (and still do) on the within-canopy interactions between chemically reactive species which are emitted by the soils and the vegetation, chemistry, turbulence and dry deposition (Figure 1).
More details of some of these studies can be found in the the following manuscripts published in J. Geophys. Res., Vol. 107, NO. D16, August, 2002: Atmos_bios_SCM.pdf, development and evalution of a multi-layer trace gas exchange model implemented in an Single Column Model (SCM) version of the chemistry and climate model ECHAM4 and globalNOx_canopy_JGR2002.pdf, use of the multi-layer model in the global model to study the role of canopy interactions for the global soil-biogenic NOx emissions. Also check my publication list for more recent studies that include further model evaluations and a study with the SCM of the Impact of Amazonian deforestation on atmospheric chemistry Deforestation_AC_GRL2004.pdf.
These studies have been done within the context of the Large scale Biosphere atmosphere project over Amazonia (LBA). For more information about this project, here are some links to LBA related sites:
LBA, webpage by CPTEC and INPE (Brazil): LBA Brasil
My dissertation, that I finished in January 2001, with the title "Surface-Atmosphere Trace Gas and Aerosol Exchanges on the Global Scale" can be downloaded as PDF Thesis.pdf or as postscript file Thesis.ps (soon available).
Publication list
For any information about my work, suggestions, comments, get in contact with me (see above this page for the details).