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Publication . Article . 2013

The MACC reanalysis: an 8 yr data set of atmospheric composition

Antje Inness; Frank Baier; Angela Benedetti; Idir Bouarar; Simon Chabrillat; Hannah Clark; Cathy Clerbaux; +24 Authors
Open Access
An eight-year long reanalysis of atmospheric composition data covering the period 2003-2010 was constructed as part of the FP7-funded Monitoring Atmospheric Composition and Climate project by assimilating satellite data into a global model and data assimilation system. This reanalysis provides fields of chemically reactive gases, namely carbon monoxide, ozone, nitrogen oxides, and formaldehyde, as well as aerosols and greenhouse gases globally at a horizontal resolution of about 80 km for both the troposphere and the stratosphere. This paper describes the assimilation system for the reactive gases and presents validation results for the reactive gas analysis fields to document the data set and to give a first indication of its quality. Tropospheric CO values from the MACC reanalysis are on average 10-20% lower than routine observations from commercial aircrafts over airports through most of the troposphere, and have larger negative biases in the boundary layer at urban sites affected by air pollution, possibly due to an underestimation of CO or precursor emissions. Stratospheric ozone fields from the MACC reanalysis agree with ozonesondes and ACE-FTS data to within ±10% in most seasons and regions. In the troposphere the reanalysis shows biases of -5% to +10% with respect to ozonesondes and aircraft data in the extratropics, but has larger negative biases in the tropics. Area-averaged total column ozone agrees with ozone fields from a multi-sensor reanalysis data set to within a few percent. NO2 fields from the reanalysis show the right seasonality over polluted urban areas of the NH and over tropical biomass burning areas, but underestimate wintertime NO2 maxima over anthropogenic pollution regions and overestimate NO2 in northern and southern Africa during the tropical biomass burning seasons. Tropospheric HCHO is well simulated in the MACC reanalysis even though no satellite data are assimilated. It shows good agreement with independent SCIAMACHY retrievals over regions dominated by biogenic emissions with some anthropogenic input, such as the eastern US and China, and also over African regions influenced by biogenic sources and biomass burning. © Author(s) 2013.
SCOPUS: re.j
Subjects by Vocabulary

Microsoft Academic Graph classification: Climatology Ozone layer Atmospheric sciences Data assimilation Seasonality medicine.disease medicine Troposphere SCIAMACHY Air pollution medicine.disease_cause Environmental science Greenhouse gas Stratosphere

Library of Congress Subject Headings: lcsh:Physics lcsh:QC1-999 lcsh:Chemistry lcsh:QD1-999

Dewey Decimal Classification: ddc:550


Deutsches Fernerkundungsdatenzentrum, atmospheric composition, data assimilation, multi-year reanalysis, MACC project results, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [], Atmospheric Science, Physico-chimie générale

Funded by
Monitoring Atmospheric Composition and Climate
  • Funder: European Commission (EC)
  • Project Code: 218793
  • Funding stream: FP7 | SP1 | SPA
Pollution of air in the extended region of Athens: Space-based Nitrogen Dioxide (NO2) observations and their comparison with remote and ground–based measurements and modeling simulations.
  • Funder: European Commission (EC)
  • Project Code: 256391
  • Funding stream: FP7 | SP3 | PEOPLE
Related to Research communities
NEANIAS Atmospheric Research Community