download_oni | R Documentation |
The Oceanic Nino Index is average sea surface temperature in the Nino 3.4 region (120W to 170W) averaged over three months. Phases are categorized by Oceanic Nino Index:
Warm phase of El Nino/ Southern Oscillation when 3-month average sea-surface temperature departure of positive 0.5 degC
Cool phase of La Nina/ Southern Oscillation when 3-month average sea-surface temperature departure of negative 0.5 degC
Neutral phase is defined as when the three month temperature average is between +0.5 and -0.5 degC
download_oni(use_cache = FALSE, file = NULL)
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. |
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: Month of record
Year: Year of record
ONI: Oneanic Oscillation Index
ONI_month_window: 3 month period over which the Oneanic Oscillation Index is calculated
phase: ENSO phase
https://www.cpc.ncep.noaa.gov/products/precip/CWlink/MJO/enso.shtml
## Not run:
oni <- download_oni()
## End(Not run)
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