Download Abstracts Here - IGAC Project

List of Abstracts 235Wake-up 2.1 ID:4414 INVITED 11:00Observing the troposphere with IASI: emission, chemistry and transportCathy ClerbauxUPMC-CNRS-LATMOS/IPSLContact: cathy.clerbaux@latmos.ipsl.frSince about one decade thermal infrared (TIR) optical sounders are providing measurements of severalreactive species, such as carbon monoxide or ozone, with good sensitivity to the troposphere. They add tothe products available from UV-visible satellite sounders and these altogether contribute in drawing a morecomplete picture of the tropospheric composition, its changes over space and time, and its impact on theglobal environment. There is currently a suite of TIR instruments in operation, with very differentinstrumental designs, driven by specific science objectives. Among these, IASI, the Infrared AtmosphericSounding Interferometer onboard MetOp satellite, has the advantage as an operational mission supportingNumerical Weather Predictions, of a relatively high spatial resolution (12 km footprint at nadir) and highspatial and temporal sampling. It covers an extended portion of the thermal infrared (645-2760 cm-1)without gaps, and therefore offers unprecedented possibilities for the sounding of the troposphere in nearrealtime and for capturing sudden changes in the atmosphere.This presentation gives an overview of the IASI achievements after 2.5 years of operation and discusses thelong-term plans for IASI-like missions in the framework of the GMES EU program (after 2020). Thechemistry products available from the mission (CO, O3, HNO3, NH3, HCOOH and CH3OH) are reviewed,with detailed characterizations of accuracy and vertical sensitivity. Based on these, the capabilities of IASIto contribute to several aspects of atmospheric chemistry, from the identification of local sources to the longrangetransport of pollution, are discussed with concrete examples. The presentation also highlights therecent exploitation of IASI data for operational applications (monitoring of fires, volcanoes, dust events andpollution episodes).Wake-up 2.2 ID:4401 INVITED 11:30Inferring surface fluxes of trace gases from space-borne data: current and future sciencePaul Palmer, Michael Barkley, Anthony Bloom, Siegfried GonziUniversity of EdinburghContact: paul.palmer@ed.ac.ukOnly over the past decade has the necessary technology begun to match our desire to observe surface airpollutants and climate-relevant trace gases in the lower troposphere where we live and breathe. A newgeneration of Earth-observing satellites, capable of probing the lower troposphere, are already orbiting theEarth with more ready for launch or in the planning stages. Consequently, this is one of the most excitingtimes for Earth system scientists who study the countless current-day physical, chemical and biologicalinteractions between the Earth’s land, ocean and atmosphere. I will present some recent results thatexemplify the Earth system approach using space-borne data, and also discuss how we can address the newchallenges associated with observing projected changes during this century.iCACGP-IGAC 2010 16 July, 2010