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

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

Author

Hernando Cortina, hch@alum.mit.edu

Examples

# \donttest{ # Fetch temp anomaly from cache if available: anomaly <- get_temp2k() # # Force cache refresh: anomaly <- get_temp2k(use_cache=FALSE) # # Review cache contents and last update dates: hockeystick_cache_details()
#> <hockeystick cached files> #> directory: C:\Users\hch\AppData\Local/R/cache/R/hockeystick #> #> file: C:\Users\hch\AppData\Local/R/cache/R/hockeystick/emissions.rds #> size: 1699.5 kB #> date: 2021-06-13 00:11:14 #> #> file: C:\Users\hch\AppData\Local/R/cache/R/hockeystick/gisstemp.rds #> size: 5.3 kB #> date: 2021-06-13 00:10:57 #> #> file: C:\Users\hch\AppData\Local/R/cache/R/hockeystick/hurricanes.rds #> size: 1.6 kB #> date: 2021-06-13 00:11:12 #> #> file: C:\Users\hch\AppData\Local/R/cache/R/hockeystick/maunaloa.rds #> size: 9.5 kB #> date: 2021-06-13 00:10:56 #> #> file: C:\Users\hch\AppData\Local/R/cache/R/hockeystick/seaice.rds #> size: 0.5 kB #> date: 2021-06-13 00:10:57 #> #> file: C:\Users\hch\AppData\Local/R/cache/R/hockeystick/sealevel.rds #> size: 16.1 kB #> date: 2021-06-13 00:11:03 #> #> file: C:\Users\hch\AppData\Local/R/cache/R/hockeystick/temp2k.rds #> size: 21.8 kB #> date: 2021-06-13 00:11:12 #>
# # Plot output using package's built-in ggplot2 settings plot_temp2k(anomaly) # }