Problems
35
Cannell, M. G. R. and R. I. Smith. (1983) Thermal time, chill days and
prediction of budburst in Picea sitchensis. J. Appl. Ecol. 20:95 1-963.
Lawrence, R.S., G.R. Ochs, and S.F. Clifford. (1970) Measurements of
atmospheric turbulence relevant to optical propagation, J. Opt. Soc.
Am. 60:826-830.
Lawrence, R.S., G.R. Ochs, and S.F. Clifford. (1972) Use of scintillations
to measure average wind across a light beam. Appl. Optics 1 1 :239243.
Monteith, J. (1977) Climate and the efficiency of crop production in
Britain. Phil. Trans. R. Soc. Lond. B281:277-294.
Porter, J. R. (1983) A model of canopy development in winter wheat. J.
Agric. Sci., Camb. 102:283-292.
Sharpe, P. J. H. and D. W. DeMichele. (1977) Reaction kinetics of
poikilotherm development. J. Theor. Biol. 64:649-670.
Wagner, T. L., H. Wu, P. J. H. Sharpe, R. M. Schoolfield, and R. N. Coulson. (1984) Modeling insect development rates: a literature review
and application of a biophysical model. Ann. Entomol. Soc. Am.
77:208-225.
Weir, A. H., P. L. Bragg, J. R. Porter, and J. H. Rayner. (1984) A winter
wheat crop simulation model without water or nutrient limitations.
J. Agric. Sci., Camb. 102:371-382.
Problems
2.1. Using the midday temperature data in the following table:
a. Plot height as a function of mean temperature.
b. Plot h[(z - d ) / z H ] (Eq. (2.1)) as a function of mean temperature;
assume the canopy height is h = 0.15 m.
c. From the plot in b, find the aerodynamic surface temperature, To.
Height (m)
Mean air temperature (C)
d. If u* = 0.2 m s-', what is the sensible heat flux, H?
2.2. Find the damping depth, D, from the data in Fig. 2.5.
2.3. If the daily maximum and minimum soil temperatures at the soil
surface are 35" C and 15" C, respectively for several consecutive
35
Cannell, M. G. R. and R. I. Smith. (1983) Thermal time, chill days and
prediction of budburst in Picea sitchensis. J. Appl. Ecol. 20:95 1-963.
Lawrence, R.S., G.R. Ochs, and S.F. Clifford. (1970) Measurements of
atmospheric turbulence relevant to optical propagation, J. Opt. Soc.
Am. 60:826-830.
Lawrence, R.S., G.R. Ochs, and S.F. Clifford. (1972) Use of scintillations
to measure average wind across a light beam. Appl. Optics 1 1 :239243.
Monteith, J. (1977) Climate and the efficiency of crop production in
Britain. Phil. Trans. R. Soc. Lond. B281:277-294.
Porter, J. R. (1983) A model of canopy development in winter wheat. J.
Agric. Sci., Camb. 102:283-292.
Sharpe, P. J. H. and D. W. DeMichele. (1977) Reaction kinetics of
poikilotherm development. J. Theor. Biol. 64:649-670.
Wagner, T. L., H. Wu, P. J. H. Sharpe, R. M. Schoolfield, and R. N. Coulson. (1984) Modeling insect development rates: a literature review
and application of a biophysical model. Ann. Entomol. Soc. Am.
77:208-225.
Weir, A. H., P. L. Bragg, J. R. Porter, and J. H. Rayner. (1984) A winter
wheat crop simulation model without water or nutrient limitations.
J. Agric. Sci., Camb. 102:371-382.
Problems
2.1. Using the midday temperature data in the following table:
a. Plot height as a function of mean temperature.
b. Plot h[(z - d ) / z H ] (Eq. (2.1)) as a function of mean temperature;
assume the canopy height is h = 0.15 m.
c. From the plot in b, find the aerodynamic surface temperature, To.
Height (m)
Mean air temperature (C)
d. If u* = 0.2 m s-', what is the sensible heat flux, H?
2.2. Find the damping depth, D, from the data in Fig. 2.5.
2.3. If the daily maximum and minimum soil temperatures at the soil
surface are 35" C and 15" C, respectively for several consecutive