download_dmi {rsoi}

Download Dipole Mode Index (DMI)

Description

Intensity of the IOD is represented by anomalous SST gradient between the western equatorial Indian Ocean (50E-70E and 10S-10N) and the south eastern equatorial Indian Ocean (90E-110E and 10S-0N). This gradient is named as Dipole Mode Index (DMI). When the DMI is positive then, the phenomenon is refereed as the positive IOD and when it is negative, it is refereed as negative IOD.

Usage

download_dmi(use_cache = FALSE, file = NULL)

Arguments

use_cache

logical option to save and load from cache. If 'TRUE', results will be cached in memory if 'file' is 'NULL' or on disk if 'file' is not 'NULL'.

file

optional character with the full path of a file to save the data. If 'cache' is 'FALSE' but 'file' is not 'NULL', the results will be downloaded from the internet and saved on disk.

Value

• Year: Year of record

• Month: Month of record

• Date: Date object that uses the first of the month as a placeholder. Date formatted as date on the first of the month because R only supports one partial of date time

• DMI: Dipole Mode Index

References

https://psl.noaa.gov/gcos_wgsp/Timeseries/DMI/

Examples

## Not run: 
dmi <- download_dmi()

## End(Not run)