def test_transpiration_rate_incrases_as_vapor_pressure_deficit_increases(
leaf_local_weather=setup_leaf_local_weather()):
air_temp = 25.
leaf_temp = 25.
atmospheric_pressure = leaf_local_weather['Pa']
gb = exchange.boundary_layer_conductance(
leaf_length=0.1,
wind_speed=leaf_local_weather['u'],
atm_pressure=leaf_local_weather['Pa'],
air_temp=air_temp,
ideal_gas_cst=exchange.R)
es = utilities.saturated_air_vapor_pressure(leaf_temp)
gs = exchange.an_gs_ci(photo_params=exchange.par_photo_default(),
meteo_leaf=leaf_local_weather,
psi=0.0,
leaf_temperature=34.,
model='misson',
g0=0.019,
rbt=2. / 3.,
ca=400.,
m0=5.278,
psi0=-0.1,
d0_leuning=30.,
steepness_tuzet=1.85)[-1]
transpiration = [
exchange.transpiration_rate(leaf_temp, ea, gs, gb,
atmospheric_pressure)
for ea in linspace(es, 0, 10)
]
assert all(x <= y for x, y in zip(transpiration, transpiration[1:]))
def test_boundary_layer_conductance_increases_as_air_temperature_increases():
gb = [
exchange.boundary_layer_conductance(leaf_length=0.1,
wind_speed=2.0,
atm_pressure=101.3,
air_temp=t,
ideal_gas_cst=exchange.R)
for t in range(-10, 46)
]
assert all(x <= y for x, y in zip(gb, gb[1:]))
def test_boundary_layer_conductance_increases_as_wind_speed_increases():
gb = [
exchange.boundary_layer_conductance(leaf_length=0.1,
wind_speed=w,
atm_pressure=101.3,
air_temp=25.,
ideal_gas_cst=exchange.R)
for w in arange(0.0, 5.0, 0.5)
]
assert all(x <= y for x, y in zip(gb, gb[1:]))
def test_boundary_layer_conductance_decreases_as_leaf_length_increases():
gb = [
exchange.boundary_layer_conductance(l,
wind_speed=2.0,
atm_pressure=101.3,
air_temp=25.,
ideal_gas_cst=exchange.R)
for l in arange(0.001, 0.25, 0.02)
]
assert all(x >= y for x, y in zip(gb, gb[1:]))
def test_boundary_layer_conductance_is_weakly_dependent_on_atmospheric_pressure(
):
gb = [
exchange.boundary_layer_conductance(leaf_length=0.1,
wind_speed=2.,
atm_pressure=p,
air_temp=25.,
ideal_gas_cst=exchange.R)
for p in arange(90.3, 102.3)
]
assert [
testing.assert_almost_equal(x, y, decimal=3)
for x, y in zip(gb, gb[1:])
]