UHImax: Maximum urban heat island intensity

In MariekeDirk/uhi_max: Maximum Urban Heat island

Description

Maximum urban heat island intensity calculated according to Theeuwes(2016). The UHImax is defined as the maximum temperature difference between the urban and rural site for a time period starting on Day0 08:00 up to Day1 07:00. The formula requires input from one rural reference station and the sky view factor and vegetation fraction inside the city. Temperature data from several stations inside the city is recommended to validate the model.

Usage

UHImax(SVF, fveg, S, DTR, U, a1 = 2, a2 = 1, a3 = 1, lambda = 3.6)

Arguments

SVF	the sky view factor at the locations
fveg	vegetation fraction in a 500 meter radius
S	hourly maximum solar irradiance at the rural site summed over 24 hours devided by 24. Start=day0 01:00, Stop=day1 00:00. NOTE: Solar irradiance is has the units K/(ms) –> devide W/m2 by air density (approximately 1.1) and specific heat capacity (approximately 1005).
DTR	diurnal temperature range calculated from Tmax and Tmin in the rural area. Start=day0 08:00, Stop=day1 07:00
U	mean 10 meter wind speed (m/s) from hourly data from the rural site. Start=day0 08:00 Stop=day1 07:00
a1, a2, a3, lambda	fitting coeficients
wd	work directory, only used when write.file==TRUE

Details

Maximum Urban heat island intensity

Source

https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.4717

MariekeDirk/uhi_max documentation built on May 23, 2019, 1:44 p.m.