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Users have requested CH4 data before 1970 #4

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ssmithClimate opened this issue Sep 9, 2017 · 1 comment
Closed

Users have requested CH4 data before 1970 #4

ssmithClimate opened this issue Sep 9, 2017 · 1 comment
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@rhoesly @aarony2j
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CMIP6 emissions_data

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@ssmithClimate
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Several modelers have requested CH4 emissions prior to 1970. CH4 emissions were released from 1970 forward because we have not processed historical data necessary to reliably extend CH4 emissions for key CH4 sectors (e.g., fossil fuel production, rice production, livestock statistics) before that point.
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rhoesly commented Sep 9, 2017

We have produced supplementary methane estimates prior to 1970 using CMIP5/RCP methane data (Lamarque et al 2010). CEDS 1970 estimates were scaled back to 1850 by aggregate sector and regions (26 sub-regions as defined by Larmarque data) every 10 years. While these estimates are not fully consistent with CEDS estimates, they provide longer time trends as requested, albeit with increased uncertainty. More information is available in the interactive discussion section of the CEDS GMD journal article and in the final manuscript.

@rhoesly rhoesly closed this as completed Sep 9, 2017
ssmithClimate added a commit that referenced this issue Aug 26, 2019
@ssmithClimate
# This is a combination of 11 commits.
5111055 
# This is the 1st commit message:

Remove unused files from master.

# This is the commit message #2:

Version comparison (#178)

* Define public CEDS release versions

- add object to common_data.R

* Fix RCP mapping

- delete second line for sector 6A, as RCP is not defined for this row
- retain first line for sector 6A, as RCP is defined here

# This is the commit message #3:

Fixing coal heat content for CO2

- output coal heat content column for 2014 data as X2014

# This is the commit message #4:

Update usa emissions and min pathways (#183)

Update US pollutant emissions Inventory to latest version and also update the minimum emission factor pathways for transportation. Generalize treatment of inventory and system end years.
# This is the commit message #5:

Waste minor update (#182)

Calculate domestic waste burning emissions from user-defined burning parameters. Lower assumption for fraction assumed burned. Increase India per-capita waste generation to newer literature value.

# This is the commit message #6:

Consistent units (#181)

Improve consistency of unit conversions across the system. Update some unit conversion values.
# This is the commit message #7:

India gains fix po (#148)

Use GAINS India data (activity, emissions, sulfur content for fuels, ash sulfur retention for coal) instead of scaling to REAS and EDGAR. Updated some European default sulfur data calcs.
# This is the commit message #8:

Remove industrial seasonality and fix speciated VOC gridding (#185)

Change industrial seasonality to flat, and update makefile for sub-VOC gridding
# This is the commit message #9:

fix linefeed

# This is the commit message #10:

Fix combustion activity order (#180)

Re-structure so that user-added energy data is added and all activity is calculated before emissions calcs. 
# This is the commit message #11:

Update readme and version number
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