HTAPv3 mosaic

An emission inventory in support to Hemisperic Transport of Air Pollution


The HTAP_v3 mosaic has been developed in the context of the UNECE Air Convention (UNECE Convention on Long-range Transboundary Air Pollution, link: as a community effort to improve the scientific knowledge of the intercontinental transport of air pollution over the Northern Hemisphere ( It consists of a global mosaic of monthly air pollutant (SO2, NOx, CO, NMVOCs, NH3, PM10, PM2.5, BC, OC) emission gridmaps at 0.1x0.1 degree resolution covering the time series 2000-2018 and all anthropogenic emission sectors, with the exception of Land Use, Land Use Change and Forestry. Emission gridmaps have been collected from officially reported data, and specifically from EMEP for Europe (CAMS-REG-v5.1), from the US Environmental Protection Agency (US EPA), Environment and Climate Change Canada (ECCC), REAS for most of the Asian domain, from Japan and CAPPS-KU for Korea. All remaining countries in the world have been covered using EDGARv6.1 air pollutant emission gridmaps. Furthermore, the EDGAR data have been used to complement the officially reported data as gapfilling source in case of missing data for certain sectors, pollutants and years.

Fig 1

Compared to the previous HTAP mosaics (HTAPv1, HTAPv2.2), HTAP_v3 aims at extending the temporal coverage of the air pollutant emissions, their sectoral breakdown and the geographical coverage of the official data. The overall purpose is to provide the scientific inventory and modelling communities a comprehensive tool to develop trend analysis, study the transboundary transport of air pollutants, and help policy makers in addressing and mitigating emissions for relevant sectors.

HTAP_v3 covers the following emission sectors:

HTAP_v3 main sectors HTAP_v3 detailed sectors
HTAP_1: International Shipping HTAP_1: International Shipping
HTAP_2: Aviation HTAP_2.1: Domestic Aviation
HTAP_2.2: International Aviation
HTAP_3: Energy HTAP_3: Energy
HTAP_4: Industry HTAP_4.1: Industry
HTAP_4.2: Fugitive
HTAP_4.3: Solvents
HTAP_5: Ground Transport HTAP_5.1: Road Transport
HTAP_5.2: Brake and Tyre wear
HTAP_5.3: Domestic shipping
HTAP_5.4: Other ground transport
HTAP_6: Residential HTAP_6: Residential
HTAP_7: Waste HTAP_7: Waste
HTAP_8: Agriculture HTAP_8.1: Agricultural waste burning
HTAP_8.2: Agriculture_livestock
HTAP_8.3: Agriculture_crops

HTAP_v3 sector mapping to IPCC categories
(11.4 KB - XLSX)

Annual and monthly time series (2000-2018)

Annual and monthly gridmaps (2000-2018)

NMVOC speciation profiles

NMVOC speciation profiles are developed for the HTAP_v3 mosaic in support of chemical mechanisms modelling. The HTAP_v3 speciation is developed for 25 GEIA NMVOC species and it is based on the work developed by Huang et al. (2017), as described in v4.3.2_VOC_spec NMVOC speciated 1970-2012. All details are included in the .xls file.

HTAP_v3 speciation profiles
(74 KB - XLSX)

HTAP tool

If you are interested in downloading the data only for a certain domain of the globe, please access the HTAP tool to submit your data request. In order to use the HTAP tool, you need to create an ECAS account.

How to cite

Crippa, M., Guizzardi, D., Butler, T., Keating, T., Wu, R., Kaminski, J., Kuenen, J., Kurokawa, J., Chatani, S., Morikawa, T., Pouliot, G., Racine, J., Moran, M. D., Klimont, Z., Manseau, P. M., Mashayekhi, R., Henderson, B. H., Smith, S. J., Suchyta, H., Muntean, M., Solazzo, E., Banja, M., Schaaf, E., Pagani, F., Woo, J.-H., Kim, J., Monforti-Ferrario, F., Pisoni, E., Zhang, J., Niemi, D., Sassi, M., Ansari, T., and Foley, K.: The HTAP_v3 emission mosaic: merging regional and global monthly emissions (2000–2018) to support air quality modelling and policies, Earth Syst. Sci. Data, 15, 2667–2694, doi:10.5194/essd-15-2667-2023, 2023.

Sources and references

Huang, G., Brook, R., Crippa, M., Janssens-Maenhout, G., Schieberle, C., Dore, C., Guizzardi, D., Muntean, M., Schaaf, E., and Friedrich, R.: Speciation of anthropogenic emissions of non-methane volatile organic compounds: a global gridded data set for 1970–2012, Atmos. Chem. Phys., 17, 7683–7701, doi:10.5194/acp-17-7683-2017, 2017


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