Comparison between the Community Land Model and the Terra Urb model in COSMO v5.0 over tropical Africa

Abstract

Comparison of model performances at 0.11° horizontal resolution over the African Great Lakes in Eastern Africa using the COSMO-CLM v5.0 model coupled to two different land use schemes : TERRA URB and Community Land Model

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Comparison between the Community Land Model and the Terra Urb model in COSMO v5.0 over
tropical Africa
O. Brousse1, H. Wouters1,2, W. Thiery3,4, M. Demuzere1,2, N.P.M. van Lipzig1
1Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium; 2Laboratory of Hydrology and Water Management, Ghent University, Ghent, Belgium;
3Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; 4Department of Hydrology and Hydraulic Engineering, Vrije Universiteit Brussel, Brussels, Belgium
CLM Assembly 2017
1. Motivation and Methodology
Provide climatic inputs for a malaria risk model applied on Sub-Saharan
African cities over a 11 year period at 12 and 2.8km (2005-2015)
Evaluation of model performances at 0.25º horizontal grid before
downscaling at urban scale using Remote Sensing and reanalysis datasets
Qualification of the potential added value of the coupled version against the
uncoupled (Davin et al., 2012) over tropical areas
Domain of study above African Great Lakes region (Thiery et al., 2015)
5. References
4. Conclusion and Future Work
No tangible added value of the coupled version CCLM2 over tropical areas
Smooth the orography to increase relative humidity circulation from the ocean
Perform the 11 years simulation using the chosen model at 12, 2.8 and 1km horizontal grid resolution
Integration of Local Climate Zones (Wouters et al., 2016), following the WUDAPT framework (Mills et
al., (2015), for improvement of the urban information over the domain of study
Mills, G., Ching, J., See, L., Bechtel, B., & Foley, M. (2015, July). An introduction to the WUDAPT project. In 9th International Conference on Urban Climate, Toulouse.
Oleson, K. W., Bonan, G. B., Feddema, J., Vertenstein, M., & Grimmond, C. S. B. (2008). An urban parameterization for a global climate model. Part I: Formulation and
evaluation for two cities. Journal of Applied Meteorology and Climatology, 47(4), 1038-1060.
Thiery, W., Davin, E. L., Panitz, H. J., Demuzere, M., Lhermitte, S., & Van Lipzig, N. (2015). The impact of the African Great Lakes on the regional climate. Journal of Climate,
28(10), 4061-4085.
Weiss, D. J., Bhatt, S., Mappin, B., Van Boeckel, T. P., Smith, D. L., Hay, S. I., & Gething, P. W. (2014). Air temperature suitability for Plasmodium falciparum malaria
transmission in Africa 2000-2012: a high-resolution spatiotemporal prediction. Malaria journal, 13(1), 171.
Wouters, H., Demuzere, M., Blahak, U., Fortuniak, K., Maiheu, B., Camps, J., ... & van Lipzig, N. P. (2016). The efficient urban canopy dependency parametrization (SURY) v1.
0 for atmospheric modelling: description and application with the COSMO-CLM model for a Belgian summer. Geoscientific Model Development, 9(9), 3027-3054.
CCLM CCLM2
TRMM
TAMSAT
PERSIANN
MSWEP
CCLM
GLEAM A GLEAM B
CCLM2
WECANN (Bilinear Remapping)
CCLM DAY CCLM NIGHT
MODIS DAY MODIS NIGHT
CCLM2 DAY CCLM2 NIGHT
CCLM
GLEAM A GLEAM B
CCLM2
ESA CCI
3. Spatial Evaluation at 0.25º for year 2015
2. Seasonal Evaluation over African Great Lakes domain for year 2015
Total Precipitation (mm) Total Evaporation (mm) Mean Land Surface Temperature (ºC) Mean Soil Moisture (m3/m3)
Dry bias in SE
part of the
domain
No direct cause
related to soil
surface