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# Global Monthly CO2 levels

This dataset concerns monthly global hemispheric means of carbon dioxide in 
air. The data is part of the CMIP6 dataset, developed by Meinshausen et al. 

When using this data, please cite:

```bib
@article{meinshausen2017historical,
	title={Historical greenhouse gas concentrations for climate modelling ({CMIP6})},
	author={Meinshausen, M. and Vogel, E. and Nauels, A. and Lorbacher, K. and Meinshausen, N. and Etheridge, D. M. and Fraser, P. J. and Montzka, S. A. and Rayner, P. J. and Trudinger, C. M. and Krummel, P. B. and Beyerle, U. and Canadell, J. G. and Daniel, J. S. and Enting, I. G. and Law, R. M. and Lunder, C. R. and O'Doherty, S. and Prinn, R. G. and Reimann, S. and Rubino, M. and Velders, G. J. M. and Vollmer, M. K. and Wang, R. H. J. and Weiss, R.},
	journal={Geoscientific Model Development},
	volume={10},
	pages={2057--2116},
	year={2017},
	publisher={Copernicus}
}
```

While it appears that the data is in the public domain, it is not clear what 
license it is under. We therefore download it from the original source (hosted 
at ETH Zurich) and convert it to our dataset format. The original data is 
sampled every 4 years and cropped to recent history to reduce the length of 
the series.

![Plot of global_co2 dataset](./global_co2.png)