catm_data {BioCro}

Global annual mean atmopspheric CO2 levels

Description

Multiple years of globally averaged annual mean atmospheric CO2 levels and their uncertainties.

This data is included in the BioCro package so users can reproduce calculations in Lochocki et al. (2022) [doi:10.1093/insilicoplants/diac003] and for exploratory purposes; it is likely that most BioCro studies will require different data sets, and no attempt is made here to be exhaustive.

Usage

catm_data

Format

Data frame with 3 columns and 44 rows:

• year: the year

• Catm: CO2 concentration (micromol / mol)

• unc: the uncertainty associated with the CO2 concentration (micromol / mol)

Source

Data were obtained from the National Oceanic and Atmospheric Administration's Global Monitoring Laboratory (https://gml.noaa.gov/ccgg/trends/data.html) on 2024-02-07.

The exact link used was https://gml.noaa.gov/webdata/ccgg/trends/co2/co2_annmean_gl.txt.

Alternatively, the data can be accessed from https://gml.noaa.gov/ccgg/trends/gl_data.html by clicking the link to Globally averaged marine surface annual mean data (CSV).

Note: the globally averaged value for 2023 was not yet available, so the 2023 Mauna Loa value was used instead as a temporary fix. This value is likely to be slightly higher than the global value (by around 1 ppm).

These data are provided here as a convenience to BioCro users; please visit the NOAA GML webpage for guidelines regarding the use of this data if you are intending to include it in a publication.