rsoi (version 0.5.1)

download_mei: Download Multivariate ENSO Index Version 2 (MEI.v2)

Description

MEI.v2 is based on EOF analysis of level pressure, sea surface temperature, surface zonal winds, surface meridional winds, and Outgoing Longwave Radiation. The analysis is conducted for 12 partially overlapping 2-month "seasons".

Warm phase is defined as MEI index greater or equal to 0.5. Cold phase is defined as MEI index lesser or equal to -0.5.

Usage

download_mei(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

• 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

• Month: Bi-moonthly season of record

• Year: Year of record

• MEI: Multivariate ENSO Index Version 2

• Phase: ENSO phase

References

https://www.esrl.noaa.gov/psd/enso/mei/

Examples

# NOT RUN {
mei <- download_mei()
# }
# NOT RUN {
# }

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