| get_carbon {hockeystick} | R Documentation |
Download and plot essential climate data
Description
Retrieves atmospheric carbon dioxide measurements from National Oceanic and Atmospheric Administration Earth System Research Laboratories monitoring laboratory in Mauna Loa, Hawaii. https://gml.noaa.gov/ccgg/trends/data.html
Usage
get_carbon(use_cache = TRUE, write_cache = getOption("hs_write_cache"))
Arguments
use_cache |
(boolean) Return cached data if available, defaults to TRUE. Use FALSE to fetch updated data. |
write_cache |
(boolean) Write data to cache, defaults to FALSE. Use TRUE to write data to cache for later use. Can also be set using options(hs_write_cache=TRUE) |
Details
get_carbon invisibly returns a tibble with NOAA's monthly average carbon dioxide measurement.
The returned object includes date, year, month, average, trend, std dev, and uncertainty columns.
Trend is NOAA's published trend. Please refer to above website for details.
Value
Invisibly returns a tibble with the monthly carbon dioxide series
Author(s)
Hernando Cortina, hch@alum.mit.edu
References
Dr. Pieter Tans, NOAA/GML https://gml.noaa.gov/ccgg/trends/ and Dr. Ralph Keeling, Scripps Institution of Oceanography https://scrippsco2.ucsd.edu/.
C.D. Keeling, R.B. Bacastow, A.E. Bainbridge, C.A. Ekdahl, P.R. Guenther, and L.S. Waterman, (1976), Atmospheric carbon dioxide variations at Mauna Loa Observatory, Hawaii, Tellus, vol. 28, 538-551
Examples
# Fetch from cache if available, otherwise download:
maunaloa <- get_carbon()
#
# Force fetch from source:
maunaloa <- get_carbon(use_cache=FALSE)
#
# Review cache contents and last update dates:
hockeystick_cache_details()
#
# Plot output using package's built-in ggplot2 settings
plot_carbon(maunaloa)