The Human Impacts Database

A collection of useful numbers for quantifying the impacts of the human presence on Earth.

This quantity comes from a time series measurement and the most recent value (2017) is reported.


Value:		{1.7 (+0.27, -0.28)} × 10¹⁰ kg CH₄ / yr see this value in other units This is equivalent to... {1.28 (+0.202, -0.210)} × 10¹⁰ kg C / yr 17 (+2.7, -2.8) Mt CH₄ / yr 12.8 (+2.02, -2.10) Mt C / yr
HuID:		30725
Relevant Year(s):		2017
Summary:		Represents the estimated annual growth rate in the total quantity of methane (CH₄) in the atmosphere. See Table 3 of the source. "Atmospheric growth is given in the same unit (Tg CH₄ / yr), based on the conversion factor of 2.75 Tg CH₄ / ppb given by Prather et al. 2012 DOI: 10.1029/2012gl051440, and the atmospheric growth rates provided in the text in parts per billion per year."
Method:		The value is derived by taking observed concentrations of CH₄ in the atmosphere and integrating this over the volume of the atmosphere to determine the total mass of atmospheric CH₄, and subsequently determining the rate at which this value changes year over year. Uncertainties are due to differences between measurements of atmospheric methane concentration. See Figure 1 for details concerning the different concentration measurements, and see Table 3 of the source for more details concerning values and uncertainties.
Source:		Saunois, M. et al. The global methane budget 2000-2017. Earth system science data (2020)
Dataset:		atmospheric CH4 concentration (monthly_global_CH4_data_processed.csv) global resolution
Trend:
Original Data License:		CC-BY 4.0
Added By:		nsarai