Get paths for emisson at file.
:param: data_path - path to files, defaults to the `gwp/data`
:return: dict with scenario names as keys and paths to
data files as values
Calculate temperature increase caused by Methane only
This uses FaiR: https://github.com/OMS-NetZero/FAIR
Returns a pandas DataFrame with columns RCP 2.6, RCP 4.5, RCP 6, RCP 8.5
and rows with yearly data from 1765 to 2500.
Calculation of GWP* from GWP
Based on Allen et. al 2018
:param: emissons pandas Series with emission values, index is year
:param: gwp_h GWP for `h` years
:param: h time in years
:param: delt delta tine in years
:return: GWP*
Read emssion data from a csv file.
Per default reads Methane data from a file with the format of the
files in `igwp/data`.
These files are from FaiR: https://github.com/OMS-NetZero/FAIR