Adrie F. G. Jacobs

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Variability of annual CO2 exchange from Dutch Grasslands C. M. J. Jacobs, A. F. G. Jacobs, F. C. Bosveld, D. M. D. Hendriks, A. Hensen, P. S. Kroon, E. J. Moors, L. Nol, A. Schrier-Uijl, and E. M. Veenendaal Alterra, P.O. Box 47, 6700 AA Wageningen, The Netherlands Wageningen University, Meteorology and Air Quality Group, P.O. Box 47, 6700 AA Wageningen,(More)
In a desert environment dew can serve as an important source of moisture for plants, biological crusts, insects and small animals. A measurement programme was carried out within a sand dune belt situated in the northwestern Negev desert, Israel, to measure daily amounts of dew deposition as well as micro-meteorological conditions during the dew formation(More)
Water temperature is an important determinant in many aquatic biological processes, including the growth and development of malaria mosquito (Anopheles arabiensis and A. gambiae) immatures. Water turbidity affects water temperature, as suspended particles in a water column absorb and scatter sunlight and hence determine the extinction of solar radiation. To(More)
For aquatic biological processes, diurnal and annual cycles of water temperature are very important to plants as well as to animals and microbes living in the water. An existing one-dimensional model has been extended to simulate the temperature profile within a small water body. A year-round outdoor experiment has been conducted to estimate the model input(More)
Measurements of carbon dioxide and water vapour flux densities were carried out for a grassland area in the centre of the Netherlands during a 12 month continuous experiment using the eddy-covariance technique. Lolium perenne and Poa trivialis mainly dominated the vegetation of the area. The leaf area index (LAI) of the grassland varied between 2.5 and 3.4,(More)
Water temperature is a critical regulator in the growth and development of malaria mosquito immatures, as they are poikilothermic. Measuring or estimating the diurnal temperature ranges to which these immatures are exposed is of the utmost importance, as these immatures will develop into adults that can transmit malaria. Recent attempts to predict the daily(More)
A field experiment was executed to measure static pressure differences around a forest edge. So-called ‘Quad-Disks’ were used to measure static pressure unaffected by the dynamic pressure induced by the probe itself. Flow obliquity appeared to have little influence on the results. For a smooth to rough transition, the results showed a maximum pressure(More)
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