Download and plot essential climate data

Retrieves the Common Era Global Surface Temperature Reconstructions. Source is PAGES2k Consortium and NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/access/paleo-search/study/26872

Usage

get_temp2k(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)

Value

Invisibly returns a tibble with filtered and unfiltered temperature reconstructions and Cowtan & Way instrumental temperatures.

get_temp2k invisibly returns a tibble with the PAGES2k Consortium temperature reconstruction (years 1-2000 CE) and instrumental record (years 1850-2017 CE). Temperatures represent deviations from the 1961-1990 mean.

The returned object includes annual average temperature anomalies as well as filtered anomalies using a 31-year Butterworth filter. Reconstructions use seven different statistical methods that draw from a global collection of temperature-sensitive palaeoclimate records.

Methodology described in PAGES2k (2019) https://www.nature.com/articles/s41561-019-0400-0

References

• PAGES2k Common Era Surface Temperature Reconstructions. https://www.ncei.noaa.gov/access/paleo-search/study/26872

• PAGES 2k Consortium., Neukom, R., Barboza, L.A. et al. Consistent multidecadal variability in global temperature reconstructions and simulations over the Common Era. Nat. Geosci. 12, 643–649 (2019). doi:10.1038/s41561-019-0400-0

Author

Hernando Cortina, hch@alum.mit.edu

Examples

# \donttest{
# Fetch temp anomaly from cache if available:
anomaly <- get_temp2k()
#> Retrieving remote data requires internet connectivity.
#
# Force cache refresh:
anomaly <- get_temp2k(use_cache=FALSE)
#> Retrieving remote data requires internet connectivity.
#
# Review cache contents and last update dates:
hockeystick_cache_details()
#> <hockeystick cached files>
#>   directory: /home/runner/.cache/R/hockeystick
#> 
#
# Plot output using package's built-in ggplot2 settings
plot_temp2k(anomaly) # }