Aircraft emissions: Difference between revisions

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This page describes the aircraft emissions inventories used by GEOS-Chem.
This page describes the aircraft emissions inventories used by GEOS-Chem.


== MIT aviation emissions inventory ==
== AEIC 2019 emissions inventory ==


''Note: These emissions are slated for inclusion into [[GEOS-Chem v9-02 benchmark history|GEOS-Chem v9-02n]].''
An updated version of the AEIC aircraft emissions (named '''AEIC 2019''') was introduced in [[GEOS-Chem 13.4.0]].


Monthly mean aircraft emissions were generated based on 2005 scheduling data from the [http://lae.mit.edu/?page_id=58 Aviation Emissions Inventory Code v2.0], developed by [mailto:nsimone@mit.edu Nick Simone] and based on research by [mailto:mejs@mit.edu Marc Stettler] under [mailto:sbarrett@mit.edu Steven Barrett]. These were implemented into GEOS-Chem by [mailto:seastham@mit.edu Sebastian D. Eastham].
'''References'''


The following are gridded at a horizontal resolution of 1&deg; x 1&deg. The emissions are vertically resolved in 60.9 m (200 ft) increments up to 1000 ft, and 1000 ft increments beyond that. The emissions are stored in NetCDF files and read in by <tt>aeic_mod.F</tt>:
*[https://github.com/geoschem/geos-chem/files/8307152/AEIC_2019_technical_note.pdf AEIC 2019 Technical Note] by Seb Eastham (MIT).
*[https://github.com/geoschem/geos-chem/pull/1183/geos-chem geoschem/geos-chem PR #1183].


# Fuelburn
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 21:41, 16 September 2022 (UTC)
# CO
# Hydrocarbons
# NOx
 
Black and organic carbon (BC/OC) are determined based on an emissions index of 0.03 g/kg fuel burn; sulfur emissions (sulfur dioxide and sulfates) are calculated assuming a fuel sulfur content of 600 ppm by mass and a sulfur conversion efficiency of 2%. The older aircraft NOx emissions have been removed wholesale, while the older sulfur emissions are enabled if AEIC emissions are disabled.
 
--[[User:Sebastian D. Eastham|Sebastian D. Eastham]] 15:15, 9 June 2011 (EDT)
 
== Old aircraft emissions inventory (prior to v9-02n) ==
 
=== NOx ===
 
The inventory of aircraft NOx used in GEOS-Chem is described in [http://acmg.seas.harvard.edu/publications/wang1998a.pdf ''Wang et al'' <nowiki>[1998]</nowiki>]:
 
<blockquote>For NO emissions from subsonic aircraft, we adopted the 1992 monthly mean emisison inventory compiled by ''Baughcum et al'' [1996] and ''Metwally'' [1995]; the inventory has a resolution of 1&deg; x 1&deg; x 1 km, and the global source is 0.51 Tg N/yr.</blockquote>
 
The source code to read data from the aircraft NOx emissions inventory is <tt>aircraft_nox_mod.f</tt>.  Routine <tt>READAIR</tt> reads the files from disk at the start of each new month, and routine <tt>AIREMISS</tt> interpolates from the 1km vertical grid to the GEOS-3, GEOS-4, GEOS-5, or GCAP vertical grid.
 
For more information about the data files, please see the following READMEs:
 
# [ftp://ftp.as.harvard.edu/pub/geos-chem/data/GEOS_0.5x0.666_CH/aircraft_NOx_200202/README GEOS_0.5x0.666_CH/aircraft_NOx_200202/README]
# [ftp://ftp.as.harvard.edu/pub/geos-chem/data/GEOS_2x2.5/aircraft_NOx_200202/README GEOS_2x2.5/aircraft_NOx_200202/README]
# [ftp://ftp.as.harvard.edu/pub/geos-chem/data/GEOS_4x5/aircraft_NOx_200202/README GEOS_4x5/aircraft_NOx_200202/README]
 
--[[User:Bmy|Bob Y.]] 16:27, 25 February 2010 (EST)
 
==== Known issues ====
Due to the [[Lightning_NOx_emissions#The common block bug fix|common block error described by Lee Murray]], in [[GEOS-Chem v7-04-13]] we have added a new module array (EMIS_AC_NOx) to "aircraft_nox_mod.f".  The EMIS_AC_NOx array will be referenced in routine "setemis.f", which will pass the aircraft NOx emissions to the SMVGEAR solver.  The old common-block array "GEMISNOX" will be removed.
 
=== SO2 ===
 
From [http://acmg.seas.harvard.edu/publications/park2004.pdf ''Park et al'' <nowiki>[2004]</nowiki>]:
 
<blockquote>Other anthropogenic sources of SO2 in the model include gridded monthly aircraft emissions (0.07 Tg S/yr)
taken from ''Chin et al.'' [2000a] ...</blockquote>
 
The aircraft emissions for SO2 are read from disk by routine <tt>READ_AIRCRAFT_SO2</tt> in module <tt>sulfate_mod.f</tt>.
 
For more information about the data files, please see the following READMEs:
 
# [ftp://ftp.as.harvard.edu/pub/geos-chem/data/GEOS_0.5x0.666_CH/sulfate_sim_200508/README GEOS_0.5x0.666_CH/sulfate_sim_200508/README]
# [ftp://ftp.as.harvard.edu/pub/geos-chem/data/GEOS_0.5x0.666_NA/sulfate_sim_200508/README GEOS_0.5x0.666_NA/sulfate_sim_200508/README]
# [ftp://ftp.as.harvard.edu/pub/geos-chem/data/GEOS_2x2.5/sulfate_sim_200508/README GEOS_2x2.5/sulfate_sim_200508/README]
# [ftp://ftp.as.harvard.edu/pub/geos-chem/data/GEOS_4x5/sulfate_sim_200508/README GEOS_4x5/sulfate_sim_200508/README]
 
--[[User:Bmy|Bob Y.]] 16:45, 25 February 2010 (EST)
 
== References ==
 
#Baughcum, S.L., T.G. Tritz, S.C. Henderson, and D.C. Pickett, ''Scheduled civil aircraft emission inventories for 1992: Database development and analysis'', <u>NASA CR-4700</u>, Nat. Aeronaut. and Space Admin., Washington DC, 1996.
#Chin, M., P. Ginoux, S. Kinne, O. Torres, B. Holben, B. N. Duncan, R. V. Martin, J. A. Logan, A. Higurashi, and T. Nakajima, ''Tropospheric aerosol optical thickness from the GOCART model and comparisons with satellite and sunphotometer measurements'', <u>J. Atmos. Sci.</u>, '''59''', 461–483, 2002.
#Metwally, M, ''Jet aircraft engine emissions database development--1992 military, charter, and nonscheduled traffic'', <u>NASA CR-4684</u>,  Nat. Aeronaut. and Space Admin., Washington DC, 1995.
#Park, R. J., D. J. Jacob, B. D. Field, R. M. Yantosca, and M. Chin, ''Natural and transboundary pollution influences on sulfate-nitrate-ammonium aerosols in the United States: implications for policy'', <u>J. Geophys. Res.</u>, '''109''', D15204, 10.1029/2003JD004473, 2004. [http://acmg.seas.harvard.edu/publications/park2004.pdf PDF]
#Wang, Y., D.J. Jacob, and J.A. Logan, ''Global simulation of tropospheric O3-NOx-hydrocarbon chemistry, 1. Model formulation'', <u>J. Geophys. Res.</u>, '''103''', D9,10,713-10,726, 1998. [http://acmg.seas.harvard.edu/publications/wang1998a.pdf PDF]
 
--[[User:Bmy|Bob Y.]] 13:46, 4 April 2011 (EDT)

Latest revision as of 20:40, 13 July 2023

This page describes the aircraft emissions inventories used by GEOS-Chem.

AEIC 2019 emissions inventory

An updated version of the AEIC aircraft emissions (named AEIC 2019) was introduced in GEOS-Chem 13.4.0.

References

--Bob Yantosca (talk) 21:41, 16 September 2022 (UTC)

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