Extending the Satellite Data Record of Tropospheric Ozone Profiles from Aura-TES to MetOp-IASI

Wednesday, 17 December 2014
Hilke Oetjen1,2, Vivienne Payne1, Susan Sund Kulawik1,3, Jessica L. Neu1, Annmarie Eldering1, John Worden1, David P Edwards4, Gene L Francis4 and Helen Marie Worden4, (1)JPL / Caltech, Pasadena, CA, United States, (2)University of California Los Angeles, JIFRESSE, Los Angeles, CA, United States, (3)Bay Area Environmental Research Institute Moffett Field, Moffett Field, CA, United States, (4)National Center for Atmospheric Research, Boulder, CO, United States
Ozone is the third most important anthropogenic greenhouse gas and a significant pollutant at the surface affecting human and plant health. Rapidly increasing Asian emissions of ozone precursors, land-surface changes from burning, and decreasing surface emissions in Europe and North America have resulted in unknown changes to the distribution of tropospheric ozone. Satellite-borne instruments provide the means for global and continuous monitoring of this important trace gas. High spectral resolution infrared radiance measurements, such as those from the Tropospheric Emission Spectrometer (TES) on the NASA Aura satellite (launched in 2004), and the Infrared Atmospheric Sounding Instruments (IASI), on the MetOp-A and MetOp-B satellites (launched in 2006 and 2012 respectively) can be used to derive vertical information of tropospheric ozone. As part of efforts to assess consistency between the TES and IASI data records, a retrieval for ozone from IASI radiances, building on the data processor for TES, has been developed as a collaboration between NASA JPL and NCAR. Using a priori information consistent with TES retrievals, the optimal estimation approach is applied to IASI radiances in order to obtain vertical distributions of ozone. This presentation shows the characterization of these IASI ozone retrievals with respect to the vertical distribution of the uncertainties and sensitivities as well as comparisons with TES. Further, trends in ozone over Asia, North America, and Europe as seen by TES and IASI are presented.