aboveground: Estimate temperature and humidity at specified height above...

In ilyamaclean/microclimf: Fast above, below or within canopy gridded microclimate modelling with R

Estimate temperature and humidity at specified height above ground

Description

The function 'aboveground' runs the above ground component of the microclimate model.

Usage

aboveground(micro, reqhgt = 0.05, pai_a = NA, tfact = 1.5)

Arguments

micro	object of class microin as returned by [modelin()]
reqhgt	height above ground for which wind speeds are wanted. If negative (below ground) wind friction velocity only is returned
pai_a	plant area index above 'reqhgt'. Determined from total 'pai' if not supplied.
tfact	coefficient determining sensitivity of soil moisture to variation in topographic wetness (see [soilmdistribute()])

Details

'pai_a' is used to calculate the radiation intercepted by leaves at 'reqhgt' if below canopy. If not supplied it is calculated from total plant area index by assuming leaf density within the canopy is uniformly vertically distributed. If supplied it must have the same dimensions as micro$pai. I.e. with the same x and y dims as the the supplied dtm and values for each hour as the z dimension.

Value

a list of the following:

Tz

Air temperatures at height 'reqhgt' (deg C)

tleaf

Leaf temperatures at height 'reqhgt' (deg C)

T0

Ground surface temperatures (deg C)

relhum

Relative humidities at height 'reqhgt' (percentage)

windspeed

Wind speeds at height 'reqhgt' (m/s)

Rdirdown

Flux density of downward direct radiation at 'reqhgt' (W/m^2 - on the horizontal

Rdirdown

Flux density of downward diffuse radiation at 'reqhgt' (W/m^2)

Rlwdown

Flux density of downward longwave radiation at 'reqhgt' (W/m^2)

Rswup

Flux density of upward shorwtave radiation at 'reqhgt' (W/m^2), assumed diffuse

Rlwup

Flux density of downward longwave radiation at 'reqhgt' (W/m^2)

See Also

[belowground()]

ilyamaclean/microclimf documentation built on Sept. 28, 2024, 4:55 p.m.