surface_df: Surface characteristics

Description Usage Arguments Examples

Description

Create a data frame of AERSCREEN surface characteristics used by MAKEMET.

Usage

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surface_df(min_temp_k = 235, max_temp_k = 315, min_wind_speed = 0.5,
  anem_height = 10, surface_profile = 7, climate_profile = 1,
  albedo = as.numeric(NA), bowen = as.numeric(NA),
  z_length = as.numeric(NA))

Arguments

min_temp_k

Minimum surface temperature in Kelvin. Defaults to 235.

max_temp_k

Maximum surface temperature in Kelvin. Defaults to 315.

min_wind_speed

Minimum wind speed in units of m/s. Requires a value of 0.5 or greater. Defaults to 0.5.

anem_height

Anemometer height in meters. Defaults to 10.

surface_profile

Dominant surface characteristics profile. Accepts integers between [0, 3]. Enter 0 if providing site specific albedo, Bowen ratio and surface roughness. Defaults to 7. Options: (0) None. User specified characteristics will be used. (1) Water (2) Deciduous forest (3) Coniferous forest (4) Swamp (5) Cultivated land (6) Grassland (7) Urban (8) Desert shrubland

climate_profile

Dominant climate moisture profile. Accepts integers between [0, 3]. Enter 0 if providing site specific albedo, Bowen ratio and surface roughness. Defaults to 1. Options: (0) None. User specified characteristics will be used. (1) Average moisture conditions (2) Wet conditions (3) Dry conditions

albedo

Albedo. The average proportion of incident light reflected at noontime. Accepts values between [0, 1]. Ignored by AERSCREEN unless surface_profile and climate_profile are set to 0.

bowen

Bowen ratio. The average midday ratio of the sensible heat flux (H) to the evaporative heat flux (E). The greater the value of H/E the dryer the conditions. Accepts values between [-10 and 10]. Ignored by AERSCREEN unless surface_profile and climate_profile are set to 0.

z_length

Surface roughness length. The height at which the mean horizontal wind speed approaches zero. Accepts values between [0.001 and 2]. Ignored by AERSCREEN unless surface_profile and climate_profile are set to 0.

Examples

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dKvale/aerscreen documentation built on May 14, 2019, 3:05 p.m.