Description Usage Arguments Details Value Author(s) References See Also Examples
Implementing the Morton CRWE formulation for estimating potential evapotranspiration or shallow lake evaporation.
1 2 3 4 |
data |
A list of data which contains the following items (climate variables) required by Morton CRWE formulation: |
constants |
A list named |
ts |
Must be either |
solar |
Must be either |
est |
Must be either |
Tdew |
Must be |
alpha |
Only needed if argument |
message |
Must be either |
AdditionalStats |
"yes" or "no" indicating whether monthly averaged and annual averaged ET should be calculated. |
save.csv |
Must be either |
... |
Dummy for generic function, no need to define. |
The type of evapotranspiration calculated can be selected through argument est
, please see Arguments
for details.
The alternative calculation options can be selected through argument solar
and Tdew
, please see Arguments
for details.
The function generates a list containing the following components:
ET.Daily |
Daily aggregated estimations of MortonCRWE potential evapotranspiration or shallow lake evaporation. |
ET.Monthly |
Monthly aggregated estimations of MortonCRWE potential evapotranspiration or shallow lake evaporation. |
ET.Annual |
Annually aggregated estimations of MortonCRWE potential evapotranspiration or shallow lake evaporation. |
ET.MonthlyAve |
Monthly averaged estimations of daily MortonCRWE potential evapotranspiration or shallow lake evaporation. |
ET.AnnualAve |
Annually averaged estimations of daily MortonCRWE potential evapotranspiration or shallow lake evaporation. |
ET_formulation |
Name of the formulation used which equals to |
ET_type |
Type of the estimation obtained which is either |
message1 |
A message to inform the users about how solar radiation has been calculated by using which data. |
message6 |
A message to inform the users about if actual dew point temperature has been used in the calculations or alternative calculations has been performed without dew point temperature data. |
Danlu Guo
McMahon, T., Peel, M., Lowe, L., Srikanthan, R. & McVicar, T. 2012. Estimating actual, potential, reference crop and pan evaporation using standard meteorological data: a pragmatic synthesis. Hydrology and Earth System Sciences Discussions, 9, 11829-11910.
Morton, F.I. 1983, Operational estimates of lake evaporation. Journal of Hydrology, vol. 66, no. 1-4, pp. 77-100.
processeddata
,defaultconstants
,constants
,ET.MortonCRWE
1 2 3 4 5 6 7 8 9 | # Use processed existing data set and constants from
# kent Town, Adelaide
data("processeddata")
data("constants")
# Call ET.MortonCRWE under the generic function ET
results <- ET.MortonCRWE(processeddata, constants, ts="monthly",
est="potential ET", solar="sunshine hours", Tdew= TRUE,
alpha = NULL, message="yes", AdditionalStats="yes", save.csv="no")
|
sh: 1: cannot create /dev/null: Permission denied
Loading required package: zoo
Attaching package: ‘zoo’
The following objects are masked from ‘package:base’:
as.Date, as.Date.numeric
Morton CRWE Potential ET
Sunshine hour data have been used for calculating incoming solar radiation
Data of dew point temperature has been used
Timestep: monthly
Units: mm
Time duration: Mar 2001 to Aug 2004
42 ET estimates obtained
Basic stats
Mean: 149.28
Max: 310.27
Min: 41.02
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