ET complementary

ET complementary

ET_CR_Xiao2020(
  Rn,
  Tair,
  D,
  U2,
  Pa = atm,
  method = c("simple", "full", "ma2021"),
  rs = 0
)

ET_CR_Ma2021(
  Rn,
  Tair,
  D,
  U2,
  Pa = atm,
  method = c("simple", "full", "ma2021"),
  rs = 0
)

Arguments

Rn

land surface net radiation, W m-2

Tair

2m air temperature (degC)

D

vapor pressure deficit (kPa)

U2

2m wind speed (m/s)

Pa

surface air pressure (kPa)

method

method for Tw calculation (not used in ET_CR_Xiao2020), see reference for details

rs

stamotal conductance for water on capony scale

References

1. Xiao, M., Yu, Z., Kong, D., Gu, X., Mammarella, I., Montagnani, L., … Gioli, B. (2020). Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration. Environmental Research Letters, 15(9). doi:10.1088/1748-9326/ab9967

2. Ma, N., Szilagyi, J., & Zhang, Y. (2021). Calibration-Free Complementary Relationship Estimates Terrestrial Evapotranspiration Globally. Water Resources Research, 57(9), 1–27. https://doi.org/10.1029/2021WR029691

Examples

ET_CR_Xiao2020(250, 25, D = 1, U2 = 2)
#>     Tair     T_wb     ET_p     ET_w     ET_a
#>    <num>    <num>    <num>    <num>    <num>
#> 1:    25 20.42997 7.952152 6.056349 5.292484
ET_CR_Ma2021(250, 25, D = 1, U2 = 2)
#>     Tair     T_wb    T_ws    T_dry     ET_p   Ep_max     ET_w        X        y
#>    <num>    <num>   <num>    <num>    <num>    <num>    <num>    <num>    <num>
#> 1:    25 20.42997 27.4243 55.96063 7.952152 15.93268 8.483597 1.142942 1.119589
#>        ET_a
#>       <num>
#> 1: 8.903142