Daniel Jacob Paul Palmer Mathew Evans Kelly Chance Thomas Kurosu

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Presentation transcript:

GLOBAL INVENTORY OF NITROGEN OXIDE EMISSIONS CONSTRAINED BY SPACE-BASED OBSERVATIONS OF NO2 COLUMNS Daniel Jacob Paul Palmer Mathew Evans Kelly Chance Thomas Kurosu Randall Martin

HOW DO WE EVALUATE AND IMPROVE BOTTOM-UP INVENTORIES? Surface NOX Global NOx Emissions (Tg N yr-1) Fossil Fuel (20-33) Biomass Burning (3-13) Soils (4-21) Here in Tg N yr-1 (based on) Fossil Fuel 24 (GEIA) Biomass Burning 6 (Logan/Duncan) Soils 5 (Yienger and Levy)

TOP-DOWN INFORMATION FROM THE GOME SATELLITE INSTRUMENT Spectral Fit (423-451 nm) Total NO2 Slant Column Remove Stratosphere Tropospheric NO2 Slant Column Calculate AMF Tropospheric NO2 Column Spatial resolution 320x40 km2 Complete global coverage in ~3 days

USE RETRIEVED NO2 COLUMNS TO MAP NOx EMISSIONS GOME Tropospheric NO2 column ~ ENOx BOUNDARY LAYER NO2 NO/NO2   W ALTITUDE NO lifetime ~hours HNO3 Emission NITROGEN OXIDES (NOx)

VERTICAL COLUMNS CONFINED TO REGIONS OF SURFACE EMISSIONS Cloud/albedo artifacts removed by AMF calculation NO/NO2   WITH ALTITUDE NOx lifetime <1day Slant Vertical

GEOS-CHEM Tropospheric NO2 GOME Tropospheric NO2 GEOS-CHEM Tropospheric NO2 r=0.75 bias 5% 1015 molecules cm-2

STRATEGY: OPTIMIZE INVENTORIES USING A PRIORI BOTTOM-UP AND GOME TOP-DOWN INFORMATION Top-down emissions A priori emissions A posteriori emissions A priori errors Top-down errors GOME GEOS-CHEM

TOP-DOWN INFORMATION FROM GOME REDUCES ERROR IN NOX EMISSION INVENTORY Bottom-up error a Mean=2.0 Top-down error t Mean=2.0 Mean=1.6

OPTIMIZED NOX EMISSIONS 36.4 Tg N yr-1 37.7 Tg N yr-1

A POSTERIORI MINUS A PRIORI EMISSIONS

PRODUCTION OF HIGHER RESOLUTION INVENTORIES: SCIAMACHY (30 x 60 km2), launched in 2002 OMI (13 x 24 km2), to be launched in 2004 Account for transport in the inversion of NO2 to NOx REFERENCES Martin, R.V., D.J. Jacob, K. Chance, T.P. Kurosu, P.I. Palmer, and M.J. Evans, Global inventory of nitrogen oxide emissions constrained by space-based observations of NO2 columns, J. Geophys. Res., 108(D17), 4537, doi:10.1029/2003JD003453, 2003. Martin, R.V., K. Chance, D.J. Jacob, T.P. Kurosu, R.J.D. Spurr, E. Bucsela, J.F. Gleason, P.I. Palmer, I. Bey, A.M. Fiore, Q. Li, R.M. Yantosca, and R.B.A. Koelemeijer, An improved retrieval of tropospheric nitrogen dioxide from GOME, J. Geophys. Res., 107(D20), 4437, 10.1029/2001JD001027, 2002.