getClimateWizard_scenarios {chillR}

Extract mutltiple scenarios from the ClimateWizard database

Description

This function is a wrapper for the getClimateWizardData function to access climate scenario data for a location of interest. Climate model runs are queried and data returned and summarized according to the specified parameters. A number of metrics are available for several climate models, which are listed in https://github.com/CIAT-DAPA/climate_wizard_api. This function can download data for multiple climate scenarios, saving users the effort to retrieve them separately.

Usage

getClimateWizard_scenarios(
  coordinates,
  scenarios,
  start_years,
  end_years,
  baseline = c(1950, 2005),
  metric = "monthly_min_max_temps",
  GCMs = "all"
)

Arguments

coordinates

position of the point of interest, specified by a vector with two elements that are called longitude and latitude (e.g. c(longitude=10, latitude=20)).

scenarios

vector of representative concentration pathway scenarios. Can only be "historical", "rcp45" or "rcp85".

start_years

vector of start year of the intervals, for which data is to be summarized. Must be of same length as scenarios.

end_years

vector of end years of the intervals, for which data is to be summarized. Must be of same length as scenarios.

baseline

numeric vector of length 2 indicating the time interval to be used as baseline for the climate scenario. The function then returns projected values relative to this baseline. Defaults to c(1950,2005) for the standard baseline of the ClimateWizard dataset. This can also assume different values, but it must span an interval of at least 20 years within the [1950; 2005] interval. Needs to be set to NA for the function to return absolute values.

metric

vector of metrics to output, from a list specified in the reference provided above. This can also be "monthly_min_max_temps", which returns all mean monthly minimum and maximum temperatures, or "precipitation" for precipitation data for all months, or "monthly_tmean" for the mean monthly temperatures of all months.

GCMs

vector of GCMs to be accessed, from a list specified in the above reference. This can also be "all" for all available GCMs (as of January 2018).

Details

Note that this function lacks quality checks. If something goes wrong, you may consider checking individual scenarios with the getClimateWizardData function.

Value

data.frame containing the requested information.

Author(s)

Eike Luedeling

References

Girvetz E, Ramirez-Villegas J, Navarro C, Rodriguez C, Tarapues J, undated. ClimateWizard REST API for querying climate change data. https://github.com/CIAT-DAPA/climate_wizard_api

Examples

#example is #d out, because of runtime issues.
#getC<-getClimateWizard_scenarios(coordinates=c(longitude=6.99,latitude=50.62),
#                                scenarios=c("rcp85","rcp45"),
#                                start_years=c(2070,2035),
#                                end_years=c(2100,2065),
#                                metric=c("monthly_tmean"),
#                                GCMs=c("all"))