⁃	Fair Use Statement:
	⁃	This gridded ethane emissions product is based on the following gas composition database:
	⁃	Sherwood, O., Schwietzke, S., Arling, V. & Etiope, G. Global Inventory of Fossil and Non-fossil Methane δ13C Source Signature Measurements for Improved Atmospheric Modeling. (2016). http://doi.org/10.15138/G37P4D.
	⁃	The ethane-to-methane (EMR) ratios from this database are not yet published, but will be in the near future (as of February 2017).
	⁃	This database is made freely available to the scientific community and is intended to stimulate and support global methane cycle and other modeling studies. We rely on the ethics and integrity of the user to assure that the authors receive fair credit for their work. Fair credit will depend on the nature of the work and the requirements of the institutions involved. Your use of this database implies an agreement to contact the database co-authors to discuss the nature of the work and the appropriate level of acknowledgement. If the database is essential to the work, or if an important result or conclusion depends on the database, co-authorship may be appropriate. This should be discussed with the co-authors at an early stage in the work. Contacting the co-authors is not optional; if you use the database, you must contact the co-authors. A co-author email distribution list is provided during the database download process, which generates an automated e-mail to the user containing all relevant information.
	⁃	Science details:
	⁃	One file for each anthropogenic source category and year
	⁃	There are three natural gas (NG) scenarios: low, medium, and high as described in: Schwietzke, S., Griffin, W. M., Matthews, H. S. & Bruhwiler, L. M. P. Natural gas fugitive emissions rates constrained by global atmospheric methane and ethane. Environ. Sci. Technol. 48, 7714–7722 (2014a).
	⁃	Oil and coal as described in: Schwietzke, S., Griffin, W. M., Matthews, H. S. & Bruhwiler, L. M. P. Global Bottom-Up Fossil Fuel Fugitive Methane and Ethane Emissions Inventory for Atmospheric Modeling. ACS Sustain. Chem. Eng. 2, 1992−2001 (2014b).
	⁃	Other: as defined in EDGAR (industrial emissions); biomass burning is excluded
	⁃	Ethane emission grids for all categories were created by applying EMR to the above methane emission grids.
	⁃	EMR refers to wt-% (as gridded emissions are given in mass units).
	⁃	NG and oil grids are based on the EMR for conventional oil/gas wells.
	⁃	Coal and Other grids are based on the EMR for coal.
	⁃	Country-level EMR data were available as follows:
	⁃	NG and oil: from 36 countries representing 76% of global NG production (2000-2015 production).
	⁃	Coal and Other: from 9 countries representing 74% of global coal production (2000-2015 production).
	⁃	For countries where no EMR data was available, the median value of all available countries was used.
	⁃	EMR from this database is substantially higher than from the few samples described in Table S-8 and p. S21f. in Schwietzke et al. (2014b).
	⁃	Global median NG/oil EMR is 0.100.
	⁃	Global median coal EMR is 0.025.
	⁃	This leads to substantially different global total ethane emissions compared to Schwietzke et al. (2014b), e.g. for 2011:
	⁃	NG medium: 10.5 Tg (vs ~ 8 Tg in Schwietzke et al. (2014b))
	⁃	Oil: 3.0 Tg (vs ~ 7 Tg in Schwietzke et al. (2014b)); this difference is largely because associated gas composition was used in Schwietzke et al. (2014b), whereas this product uses the same EMR for oil and NG
	⁃	Coal/Other: 2.3 Tg (vs ~ 0.6 Tg in Schwietzke et al. (2014b))
	⁃	Note that NG and oil ethane emission grids are most representative of upstream (extraction and gathering) emissions. Downstream EMR may be very different from upstream (likely lower). Since the grids include both upstream and downstream emissions, the upstream vs downstream difference in EMR may represent a significant limitation for atmospheric modeling. Also, EMR may change substantially over time for a given country (see for example Table S-8 in Schwietzke et al. (2014b)), which is not taken into account here.
	⁃	Technical details:
	⁃	Text files are space delimited.
	⁃	Spatial resolution is 0.1 x 0.1 degrees.
	⁃	Please check grid orientation (files are 0-359 degrees, not -180 to 179).
	⁃	Unit is kg ethane per grid cell per year.