A14A-01
Quantification of surface emissions: An historical perspective from GEIA

Monday, 14 December 2015: 16:00
3010 (Moscone West)
Claire Granier1, Hugo Denier Van Der Gon2, El Hadji Thierno Doumbia3, Gregory J Frost4, Alex B Guenther5, Birgit Hassler4,6, Greet Georgette Alice Janssens-Maenhout7, Gitta Lasslop8, Megan L Melamed6, Paulette Middleton9, Katerina Sindelarova10, Leonor Tarrason11, Margreet van Marle12, Johannes Kaiser13 and Guido van der Werf12, (1)LATMOS, Paris, France and CIRES/NOAA, Boulder, USA, Paris Cedex 05, France, (2)Netherlands Organization for Applied Scientific Research, Utrecht, Netherlands, (3)LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales, Paris Cedex 05, France, (4)NOAA, Earth System Research Laboratory, Boulder, CO, United States, (5)University of California Irvine, Irvine, CA, United States, (6)Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, (7)European Commission Joint Research Centre, Ispra Vey, Italy, (8)Max Planck Institute for Meteorology, Hamburg, Germany, (9)Panorama Pathways, Boulder, CO, United States, (10)Charles University, Atmospheric Phisics, Prague, Czech Republic, (11)Norwegian Institute for Air Research, Kjeller, Norway, (12)VU University Amsterdam, Amsterdam, Netherlands, (13)Max Planck Institute for Chemistry, Mainz, Germany
Abstract:
Assessments of the composition of the atmosphere and its evolution require accurate knowledge of the surface emissions of atmospheric compounds. The first community development of global surface emissions started in 1990, when GEIA was established as a component of the International Global Atmospheric Chemistry (IGAC) project. At that time, GEIA meant "Global Emissions Inventory Activity". Since its inception, GEIA has brought together people to understand emissions from anthropogenic, biomass burning and natural sources. The first goal of GEIA was to establish a "best" inventory for the base year 1985 at 1x1 degree resolution. Since then many inventories have been developed by various groups at the global and regional scale at different temporal and spatial resolutions. GEIA, which now means the "Global Emissions Initiative", has evolved into assessing, harmonizing and distributing emissions datasets.

We will review the main achievements of GEIA, and show how the development and evaluation of surface emissions has evolved during the last 25 years. We will discuss the use of surface, in-situ and remote sensing observations to evaluate and improve the quantification of emissions. We will highlight the main uncertainties currently limiting emissions datasets, such as the spatial and temporal evolution of emissions at different resolutions, the quantification of emerging emission sources (such as oil/gas extraction and distribution, biofuels, etc.), the speciation of the emissions of volatile organic compounds and of particulate matter, the capacity building necessary for organizing the development of regional emissions across the world, emissions from shipping, etc. We will present the ECCAD (Emissions of Atmospheric Compounds and Compilation of Ancillary Data) database, developed as part of GEIA to facilitate the access and evaluation of emission inventories.