Land Surface Processes / Surface Hydology

 
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Land Surface Processes / Surface Hydology
Modelling Vegetation-Climate Relationships

 

In conjunction with Prof. Steve Running (University of Montana) and Dr. Mamoudou Ba, our lab has researched various aspects of land surface processes over Africa.  We are assess past and current vegetation and its relationship to climate variables, structural and functional characteristics of African vegetation as related to climate (e.g., NDVI, albedo), climatic change in the various vegetation provinces, and the impact of vegetation changes on climate.  We have also derived complete surface water balance estimates at high resolution for the continent, calculating surface runoff and evaporation on a monthly basis and comparing the impact of surface hydrology on regional vegetation growth.

 
 
  1. Land Surface2000: Land Surface Processes and Sahel Climate. Reviews of Geophysics, 38, 117-139.
  2. Cloudiness Lake Victoria2000: On the diurnal cycle of cloudiness over Lake Victoria and its influence on evaporation from the lake (with X. Yin and M.B. Ba). Hyrdological Sciences - Journal 45, 407-424.
  3. Desertification1998: Desertification, Drought and Surface Vegetation: An example from the West African Sahel (with C.J. Tucker and M.B. Ba). Bulliten of the American Meteorolgical Society, 79, 816-829.
  4. Water Balance1998: The Water Balance of Lake Victoria (with X. Yin). Hyrdological Sciences - Journal, 789-811.
  5. 1998: Desert Hydrology. Encyclopedia of Hydrology and Water Resources (R. Herschy and R. W. Fairbridge, eds.), Kluwer, Dordrecht, 176-183.
  6. Surface Water balance1997: The Mean Surface Water Balance over Africa and its Interannual Variablility (with J. Kim, M.B. Ba, A.R. Lare). V10, 2981-3002.
  7. 1997: A Daily Resolution Evapoclimatonomy Model Applied to Surface Water Balance Calculations at the HAPEX-Sahel supersites (with J.A. Marengo, J. Kim, A.R. Lare, S. Galle, Y.H. Kerr). Journal of Hyrdology 188-189, 946-964.
  8. Evapoclimatology1996: Application of Evapoclimatonomy to Monthly Surface Water Balance Calculations at the HAPEX-Sahel Supersites. (With J.A. Marengo, A.R. Lare, B.A. Monteny and S. Galle) Journal of Applied Meteorology, Vol 35, No. 4, April 1996
  9. Lettau's Evapoclimatology1996: A Revised Version of Lettau's Evapoclimatonly Model. (With J.A. Marengo, P. Santos) Journal of Applied Meteorology, Vol 35, No. 4, April 1996
  10. Influence on Relationships1994: The influence of Soil Type on the Relationships between NDVI, Rainfall, and Soil Moisture in Semiarid Botswana. I. NDVI Response to Rainfall (with T.J. Farrar). Remote Sens. Environ. 50, 107-120.
  11. Contrasting Conditions1994: Contrasting Conditions of Surface Water Balance in Wet Years and Dry Years as a Possible Land Surface-Atmosphere Feedback Mechanism in the West African Sahel (with A.R. Lare). Journal of Climate, V7, 5, 654-668
  12. Influence on Relationships II1994: The influence of soil type on the relationships between NDVI, rainfall and soil moisture in semi-arid Botswana. Part II. Response to soil moisture Remote Sensing of Environment (T.J. Farrar, S.E. Nicholson and A.R. Lare), 50, 121-133.
  13. 1991: Prediction of trace gas emissions and their climatic impacts: some geographical considerations. Terrestrial Biosphere Exchange With Global Atmospheric Chemistry. Report on the SCOPE/IGBP Workshop on Trace Gas Exchange in a Global Perspective, Sigtuna, Sweden, February 1990 (P.A. Matson and D.S. Ojima, eds.) IGBP Report No. 13, in press (also appears as a Journal Article).
  14. 1990: A climatonomic description of the surface energy balance in the central Sahel. Part I. Shortwave radiation. Journal of Applied Meteorology, 29, 123-137 (A.R. Lare and S.E. Nicholson).
  15. 1990: A climatonomic description of the surface energy balance in the central Sahel. Part II. The evapoclimatonomy submodel. Journal of Applied Meteorology, 29, 138-146 (S.E. Nicholson and A.R. Lare).
  16. 1990: A study of rainfall and vegetation dynamics in the African Sahel using normalized difference vegetation index (with A.R. Malo). Journal of Arid Environments, 19, 1-24.
  17. Comparison NDVI1990: A Comparison of the Vegetation Response to Rainfall in the Sahel and East Africa, Using Normalized Difference Vegetation Index from NOAA AVHRR (with M.L. Davenport, A.R. Malo) Climatic Change 17, 209-241.
  18. Land Surface1988: Land Surface Atmosphere Interaction: Physical processes and Surface Changes and their Impact. Progress in Physical Geography, 12, 1, 36-65.