SSTindex: Get Sea Surface Temperature Indices

In environmentalinformatics-marburg/ESD:

Description

Retrieve selected surface ocean indices provided by the Ocean Observations Panel for Climate (OOPC). If an active internet connection is available, the latest online version of the respective index is used instead of the built-in static data sets (end 27 February 2017).

Usage

## S4 method for signature 'character'
SSTindex(index = "dmi", quiet = FALSE, ...)

## S4 method for signature 'missing'
SSTindex()

Arguments

index	character, defaults to "dmi" (Dipole Mode Index). SST index under investigation, run SSTindex() for a full list of currently available options.
quiet	logical, defaults to FALSE. Determines whether status messages and warnings are suppressed.
...	Additional arguments passed to download.file (except for 'destfile' and 'quiet'), ignored if 'index' is missing.

Value

If 'index' is missing, a list of available indices divided by region of interest (Pacific, Atlantic, Indian), else a 2-column data.frame with SST index values per time step.

References

Detsch F, Otte I, Appelhans T, Hemp A, Nauss T (2016) Seasonal and long-term vegetation dynamics from 1-km GIMMS-based NDVI time series at Mt. Kilimanjaro, Tanzania. Remote Sensing of Environment 178, 70-83, http://dx.doi.org/10.1016/j.rse.2016.03.007.

Otte I, Detsch F, Mwangomo E, Hemp A, Appelhans T, Nauss T (2017) Multidecadal Trends and Interannual Variability of Rainfall as Observed from Five Lowland Stations at Mt. Kilimanjaro, Tanzania. Journal of Hydrometeorology 18, 349-361, http://dx.doi.org/10.1175/JHM-D-16-0062.1.

See Also

Ocean Observations Panel for Climate (2017) The State of the Ocean Climate. Available online: http://stateoftheocean.osmc.noaa.gov/all/.

Examples

## list available indices
SSTindex()

## nino 3.4 region
oni <- SSTindex(index = "nino34", quiet = TRUE)
plot(oni[, 1], oni[, 2], type = "l", xlab = "Time", ylab = "ONI",
     main = expression(bold("Oceanic Ni" * tilde(n) * "o Index") ~ 
                       "(Ni" * tilde(n) * "o 3.4 region)"))

environmentalinformatics-marburg/ESD documentation built on May 16, 2019, 7:49 a.m.