Aircraft emissions

NOx

The inventory of aircraft NOx used in GEOS-Chem is described in Wang et al [1998]:

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° x 1° x 1 km, and the global source is 0.51 Tg N/yr.

The source code for the aircraft NOx emissions inventory is aircraft_nox_mod.f.

For more information about the data files, please see the following READMEs:

1. GEOS_0.5x0.666_CH/aircraft_NOx_200202/README
2. GEOS_0.5x0.666_CH/aircraft_NOx_200202/README
3. GEOS_2x2.5/aircraft_NOx_200202/README
4. GEOS_4x5/aircraft_NOx_200202/README
5. GCAP_4x5/aircraft_NOx_200202/README

--Bob Y. 16:27, 25 February 2010 (EST)

02-Oct-2007

Due to the 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.

References

1. Baughcum, S.L., T.G. Tritz, S.C. Henderson, and D.C. Pickett, Scheduled civil aircraft emission inventories for 1992: Database development and analysis, NASA CR-4700, Nat. Aeronaut. and Space Admin., Washington DC, 1996.
2. 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, J. Geophys. Res., 109, D15204, 10.1029/2003JD004473, 2004. PDF
3. Wang, Y., D.J. Jacob, and J.A. Logan, Global simulation of tropospheric O3-NOx-hydrocarbon chemistry, 1. Model formulation, J. Geophys. Res., 103, D9,10,713-10,726, 1998. PDF
4. Metwally, M, Jet aircraft engine emissions database development--1992 military, charter, and nonscheduled traffic, NASA CR-4684, Nat. Aeronaut. and Space Admin., Washington DC, 1995.

--Bob Y. 16:27, 25 February 2010 (EST)