Difference between revisions of "Emissions overview"

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Here is a quick overview of the emissions inventories that are currently available in GEOS-Chem.
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#REDIRECT [[HEMCO data directories]]
 
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== Anthropogenic emissions ==
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Please see our [[Anthropogenic emissions|anthropogenic emissions wiki page]] for details about all global and regional inventories, or download the following documentation:
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* [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]
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* [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]
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* [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)]
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=== Baseline inventory ===
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By default, GEOS-Chem uses the [[Anthropogenic emissions#GEIA/Piccot|GEIA/Piccot]] inventory with 10 gas-phase species:
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{| border=1 cellpadding=5 cellspacing=0
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|- bgcolor="#CCCCCC" align="center"
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! Species
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! Name
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! Equivalent # of carbons
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|- align="center"
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| NO<sub>x</sub>
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| Odd nitrogen = NO<sub>2</sub> + NO + NO<sub>3</sub> + HNO<sub>2</sub>       
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|&nbsp;
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|- align="center"
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| CO
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| Carbon monoxide       
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|&nbsp;
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|- align="center"
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| PRPE
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| >= C3 Alkanes       
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| 3
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|- align="center"
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| C<sub>3</sub>H<sub>8</sub>
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| Propane       
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| 3
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|- align="center"
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| ALK4
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| >= C4 Alkenes
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| 4
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|- align="center"
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| C<sub>2</sub>H<sub>6</sub>
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| Ethane
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| 2
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|- align="center"
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| ACET
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| Acetone
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| 3
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|- align="center"
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| MEK
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| Methyl Ethyl Ketone
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| 4
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|- align="center"
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| ALD2
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| Acetaldehyde
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| 3
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|- align="center"
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| CH<sub>2</sub>O
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| Formaldehyde
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|&nbsp;
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|}
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=== Optional inventories ===
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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]].
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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.).
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=== Anthropogenic emissions of aerosols ===
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Several aerosol species have anthropogenic emissions.  Please see our [[Aerosol emissions#Anthropogenic emissions|aerosol emissions page]] for more information about these inventories.
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=== Annual scale factors ===
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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]].
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== Biofuel emissions ==
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GEOS-Chem emits the same 12 species as for [[Anthropogenic emissions|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:
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* [[EPA/NEI99 North American emissions|EPA/NEI99 biofuel emissions]] over N. America
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* [[Anthropogenic emissions#David Streets|David Streets et al 2006 biofuel emissions]] over SE Asia
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== Biogenic emissions ==
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=== GEIA ===
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By default, GEOS-Chem emits the following species from the [[Biogenic emissions#GEIA|GEIA biogenic emissions inventory]]:
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{| border=1 cellpadding=5 cellspacing=0
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|- bgcolor="#CCCCCC" align="center"
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! Species
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! Name
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! Generic formula
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! Equivalent # of carbons
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|- align="center"
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| ISOP
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| Isoprene     
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| C<sub>5</sub>H<sub>8</sub>
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| 5
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|- align="center"
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| MONOT
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| Monoterpenes
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| C<sub>10</sub>H<sub>16</sub>
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| 10
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|- align="center"
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| MBO
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| Methyl Butenol
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| C<sub>5</sub>H<sub>10</sub>O
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| 5
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|- align="center"
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| ACET
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| Acetone     
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| CH<sub>3</sub>COCH<sub>3</sub>
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| 3
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|- align="center"
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| ALK4 (scaled from ISOP)
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| >=C4 alkenes
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|&nbsp;
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| 4
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|}
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=== MEGAN ===
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The following species may be overwritten with the MEGAN inventory (this is now recommended)!
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#Isoprene
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#Monoterpenes
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#Methyl Butenol
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Please see our [[MEGAN biogenic emissions]] wiki page for more information.
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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.
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== Biomass burning ==
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By default GEOS-Chem uses 15 biomass burning species from [http://acmg.seas.harvard.edu/publications/duncan2002a.pdf ''Duncan et al'' <nowiki>[2003]</nowiki>]:
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# NOx
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# CO
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# ALK4
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# ACET
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# MEK
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# ALD2
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# PRPE
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# C3H8
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# CH2O
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# C2H6
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# SO2
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# NH3
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# BC
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# OC
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# CO2 (NOTE: for offline simulations only!)
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Most of these are also [[#Anthropogenic emissions|anthropogenic emissions species]].
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All of these species can be overwritten by [[Biomass_burning_emissions#GFED2|GFED2 monthly, 8-days, or 3hr biomass emissions]].
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--[[User:Bmy|Bob Y.]] 14:40, 17 March 2010 (EDT)
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== Other NOx emissions sources ==
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Please see the following wiki pages for information about other sources of NOx emissions:
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# [[Aircraft emissions#NOx|NOx emissions from aircraft]]
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# [[Lightning NOx emissions|NOx emissions from lightning]]
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# [[Soil NOx emissions|NOx emissions from soils]]
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--[[User:Bmy|Bob Y.]] 14:40, 17 March 2010 (EDT)
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== Aerosol emissions ==
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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.)
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--[[User:Bmy|Bob Y.]] 14:40, 17 March 2010 (EDT)
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Latest revision as of 18:26, 25 May 2018