HAPEX-Sahel

著者

書誌事項

HAPEX-Sahel

J.P. Goutorbe ... [et al.]

Elsevier, 1997

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注記

"Reprinted from Journal of Hydrology 188-189/1-4" -- t.p. verso

Includes bibliographical references

内容説明・目次

内容説明

Land-surface processes are essential to the understanding of climate. They are also critical to a better assessment of the availability of water resources and further, central to the description of the interactions between the climate and the biosphere. The HAPEX-Sahel programme was set up specifically in Niger to study these points. In the sub-sahelian region the rainy season is short, 3 months long, during which time the conditions vary from extreme dryness to a full bloom of natural and agricultural vegetation, followed by a rapid senescence. In other words the location of Niger for this research made it possible to document over a period of 3 months, processes that would have taken one full year to observe in a region of less extreme conditions. This text present the results collected during the nine-year HAPEX-Sahel programme. Issues discussed include: how spatial integration is tackled using remote-sensing techniques; how the atmospheric circulations are organized with respect to surface forcing; how the vegetation dynamically responds to moisture availability; and how water is transferred and stored in ponds and water-tables in complex hydrographic systems.

目次

  • HAPEX-Sahel - De la naissance a l'age adulte, from birth to adulthood, J.-C. Andre
  • Rainfall climatology of the HAPEX-Sahel region during the years 1950-1990, L. Le Barbe, T. Lebel
  • Rainfall monitoring during HAPEX-Sahel
  • General rainfall conditions and climatology, T. Lebel et al
  • Water table fluctuation and recharge in semi-arid climate - some results of the HAPEX-Sahel hydrodynamic survey (Niger), C. Leduc et al
  • Estimation of rainfall inputs and direct recharge to the deep unsaturated zone of southern Niger using the chloride profile method, J. Bromley et al
  • Hydrology of the HAPEX-Sahel Central Super-Site: surface water drainage and aquifer recharge through the pool systems, J.C. Desconnets et al
  • Runoff generation processes: results and analysis of field data collected at the East Central Supersite of the HAPEX-Sahel experiment, C. Peugeot et al
  • Estimating hydraulic conductivity of crusted soils using disc infiltrometers and minitensiometers, J.-P. Vandervaere et al
  • Soil measurements during HAPEX-Sahel intensive observation period (R.H. Cuenca et al
  • Measurement of surface redistribution of rainfall and modelling its effect on water balance calculations for a millet field on sandy soil in Niger, S.R. Gaze et al
  • Airborne microwave radiometry on a semi-arid area during HAPEX-Sahel, A. Chanzy et al
  • The effects of laterite and associated terrain components on PBMR response in HAPEX-Sahel, W.L. Teng et al
  • Feasibility of simultaneous surface temperature-emissivity retrieval using SSM/I measurements from HAPEX-Sahel, X. Xiang et al
  • Retrieval of soil moisture and vegetation characteristics by use of ERS-1 wind scatterometer over arid and semi-arid areas, R.D. Magagi, Y.H. Kerr
  • The variability of evaporation during the HAPEX-Sahel intensive observation period, J.H.C. Gash et al
  • A comparison of surface fluxes at the HAPEX-Sahel fallow bush sites, C.R. Lloyd et al
  • Soil evaporation from tiger-bush in south-west Niger, J.S. Wallace, C.J. Holwill
  • Soil evaporation from sparse natural vegetation estimated from Sherwood numbers, A.F.G. Jacobs, A. Verhoef
  • Flux heterogeneity and evapotranspiration partitioning in a sparse canopy - the fallow savanna, A. Tuzet et al
  • Evaporation, sensible heat and canopy conductance of fallow savannah and patterned woodland in the Sahel, P. Kabat et al
  • The role of the Sahelian biosphere on the water and the CO2 cycle during the HAPEX-Sahel Experiment, B.A. Monteny et al
  • Stomatal conductance of West-Central Supersite vegetation in HAPEX-Sahel - measurements and empirical models, N.P. Hanan, S.D. Prince
  • Spatial and temporal variations in net carbon flux during HAPEX-Sahel, J.B. Moncrieff et al
  • A system to measure surface fluxes of momentum, sensible heat, water vapour and carbon dioxide, J.B. Moncrieff et al
  • CO2 fluxes at leaf and canopy scale in millet, fallow and tiger bush vegetation at the HAPEX-Sahel southern super-site, P.E. Levy et al.

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