Retrieves global mean sea level (GMSL) data from historic tide gauge and recent satellite altimeter observations (in mm). Source for tide gauge data is Commonwealth Scientific and Industrial Research Organisation (CSIRO) as described in Church and White (2011). https://research.csiro.au/slrwavescoast/sea-level/measurements-and-data/sea-level-data/

Source for satellite data is NOAA Laboratory for Satellite Altimetry: https://www.star.nesdis.noaa.gov/socd/lsa/SeaLevelRise/

get_sealevel(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 the global mean sea level time series (in mm) over 1880-2013 using tide gauges and since 1993 for satellite measurements.

get_sealevel invisibly returns a tibble with mean sea level in mm time series from tide gauges and satellite observations.

The satellite observations have been releveled so that their mean level in 1993 matches that of the tide gauges.

The tide gauge data are no longer updated and cover the period from 1880 to 2013, per Church, J. A. and N.J. White (2011) https://research.csiro.au/slrwavescoast/sea-level/measurements-and-data/sea-level-data/

Satellite data are updated monthly or more frequently from the NOAA Laboratory for Satellite Altimetry. TOPEX and Jason-1,-2,-3 satellites dataset, with seasonal signals removed. https://www.star.nesdis.noaa.gov/socd/lsa/SeaLevelRise/

References

Author

Hernando Cortina, hch@alum.mit.edu

Examples

# \donttest{ # Fetch sea level from cache if available: gmsl <- get_sealevel() # # Force cache refresh: gmsl <- get_sealevel(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 #>
# # Plot output using package's built-in ggplot2 settings plot_sealevel(gmsl) # }