Emissions overview: Difference between revisions

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Here is a quick overview of the emissions inventories that are currently available in GEOS-Chem.
#REDIRECT [[HEMCO data directories]]
 
== Anthropogenic emissions ==
 
Please see our [[Anthropogenic emissions|anthropogenic emissions wiki page]] for details about all global and regional inventories, or download the following documentation:
 
* [http://acmg.seas.harvard.edu/geos/word_pdf_docs/emissions_v8_02_03.pdf Description of anthropogenic emissions inventories in GEOS-Chem v8-02-03]
* [http://wiki.seas.harvard.edu/geos-chem/images/Anth_emiss_gc_v8-01-04.pdf Description of anthropogenic emissions inventories in GEOS-Chem v8-01-04]
* [http://acmg.seas.harvard.edu/geos/word_pdf_docs/INVENTORY_GC_public-pre_v8.pdf Table of available anthropogenic emissions inventories for use w/ GEOS-Chem (pre-v8)]
 
=== Baseline inventory ===
 
By default, GEOS-Chem uses the [[Anthropogenic emissions#GEIA/Piccot|GEIA/Piccot]] inventory with 10 gas-phase species:
 
{| border=1 cellpadding=5 cellspacing=0
|- bgcolor="#CCCCCC" align="center"
! Species
! Name
! Equivalent # of carbons
|- align="center"
| NO<sub>x</sub>
| Odd nitrogen = NO<sub>2</sub> + NO + NO<sub>3</sub> + HNO<sub>2</sub>       
|&nbsp;
|- align="center"
| CO
| Carbon monoxide       
|&nbsp;
|- align="center"
| PRPE
| >= C3 Alkanes       
| 3
|- align="center"
| C<sub>3</sub>H<sub>8</sub>
| Propane       
| 3
|- align="center"
| ALK4
| >= C4 Alkenes
| 4
|- align="center"
| C<sub>2</sub>H<sub>6</sub>
| Ethane
| 2
|- align="center"
| ACET
| Acetone
| 3
|- align="center"
| MEK
| Methyl Ethyl Ketone
| 4
|- align="center"
| ALD2
| Acetaldehyde
| 3
|- align="center"
| CH<sub>2</sub>O
| Formaldehyde
|&nbsp;
|}
 
=== Optional inventories ===
 
It is the usual practice to replace the NOx, CO, and SOx from the [[Anthropogenic emissions#GEIA/Piccot|GEIA/Piccot]] inventory with data from the [[Anthropogenic emissions#EDGAR|global EDGAR emissions inventory]].
 
These emissions may be further overwritten by one or more [[Anthropogenic emissions#Regional inventories|regional emissions inventories]] in various locations of the globe (e.g. N. America, Asia, Europe, etc.).
 
=== Anthropogenic emissions of aerosols ===
 
Several aerosol species have anthropogenic emissions.  Please see our [[Aerosol emissions#Anthropogenic emissions|aerosol emissions page]] for more information about these inventories.
 
=== Ship emissions ===
 
[[Ship emissions|Emissions from ship exhaust]] from several global (e.g. [[Anthropogenic emissions#EDGAR|EDGAR]]) and regional (e.g. [[Anthropogenic emissions#EMEP|EMEP]] etc.) inventories can also be selected.
 
=== Annual scale factors ===
 
Several of the emission inventories are for a particular year or range of years.  To obtain emissions for years outside of the given range, [[Scale factors for anthropogenic emissions|interannual scale factors must be applied]].
 
== Biofuel emissions ==
 
GEOS-Chem emits the same 12 species as for [[#Baseline inventory|anthropogenic emissions]] listed above.  The default inventory is that of [[Biofuel emissions#Yevich and Logan|''Yevich and Logan'' <nowiki>[2003]</nowiki>]].  This inventory can be overwritten by:
 
* [[EPA/NEI99 North American emissions|EPA/NEI99 biofuel emissions]] over N. America
* [[Anthropogenic emissions#David Streets|David Streets et al 2006 biofuel emissions]] over SE Asia
 
== Biogenic emissions ==
 
=== GEIA ===
 
By default, GEOS-Chem emits the following species from the [[Biogenic emissions#GEIA|GEIA biogenic emissions inventory]]:
 
{| border=1 cellpadding=5 cellspacing=0
|- bgcolor="#CCCCCC" align="center"
! Species
! Name
! Generic formula
! Equivalent # of carbons
|- align="center"
| ISOP
| Isoprene     
| C<sub>5</sub>H<sub>8</sub>
| 5
|- align="center"
| MONOT
| Monoterpenes
| C<sub>10</sub>H<sub>16</sub>
| 10
|- align="center"
| MBO
| Methyl Butenol
| C<sub>5</sub>H<sub>10</sub>O
| 5
|- align="center"
| ACET
| Acetone     
| CH<sub>3</sub>COCH<sub>3</sub>
| 3
|- align="center"
| ALK4 (scaled from ISOP)
| >=C4 alkenes
|&nbsp;
| 4
|}
 
=== MEGAN ===
 
The following species may be overwritten with the MEGAN inventory (this is now recommended)!
 
#Isoprene
#Monoterpenes
#Methyl Butenol
 
Please see our [[MEGAN biogenic emissions]] wiki page for more information.
 
Also see our [[Emissions Working Group#GEOS-Chem Emissions Issues(please add yours!)|Isoprene Emission Estimates in the Literature]] page for Isoprene Emission Estimates in the literature.
 
== Biomass burning ==
 
By default GEOS-Chem uses 15 biomass burning species from [http://acmg.seas.harvard.edu/publications/duncan2002a.pdf ''Duncan et al'' <nowiki>[2003]</nowiki>]:
 
# NOx
# CO
# ALK4
# ACET
# MEK
# ALD2
# PRPE
# C3H8
# CH2O
# C2H6
# SO2
# NH3
# BC
# OC
# CO2 (NOTE: for offline simulations only!)
 
Most of these are also [[#Anthropogenic emissions|anthropogenic emissions species]].
 
All of these species can be overwritten by [[Biomass_burning_emissions#GFED2|GFED2 monthly, 8-days, or 3hr biomass emissions]].
 
--[[User:Bmy|Bob Y.]] 14:40, 17 March 2010 (EDT)
 
== Other NOx emissions sources ==
 
Please see the following wiki pages for information about other sources of NOx emissions:
 
# [[Aircraft emissions#NOx|NOx emissions from aircraft]]
# [[Lightning NOx emissions|NOx emissions from lightning]]
# [[Soil NOx emissions|NOx emissions from soils]]
 
--[[User:Bmy|Bob Y.]] 14:40, 17 March 2010 (EDT)
 
== Aerosol emissions ==
 
Please see our [[Aerosol emissions]] wiki page for a full description of the inventories which contain aerosol species (e.g. SO2, SO4, NH3, NH4, etc.)
 
--[[User:Bmy|Bob Y.]] 14:40, 17 March 2010 (EDT)

Latest revision as of 18:26, 25 May 2018

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