Speaker
Dr
Pierre Coheur
(Université Libre de Bruxelles)
Description
The Infrared Atmospheric Sounding Interferometers (IASI) are a suite of nadir sounders onboard the European MetOp platforms. The first instrument was launched on MetOp-A in 2007 and is still in operation. It was followed by IASI-B in 2012, and a third instrument is schedule for launch in 2018. Overall the IASI program will thus provide an unprecedented record of atmospheric measurements of 20 years, which will be continued for another 15 years at least with the IASI-NG mission on EPS-SG. Although IASI had atmospheric composition only has a side objective, it has rapidly proven being a key element of the Earth observing system for all aspects related to the chemistry of the lower atmosphere. This talk will briefly review some of the main achievements of IASI for monitoring the troposphere and the stratosphere. It will then focus on the monitoring of the stratospheric system with the measurements of ozone and nitric acid columns; the presentation will in particular put emphasis on the analysis of the available 10-years time series of the two species and will show how these allow identifying the processes responsible for their stratospheric variability at different latitudes, and assessing trends. The presentation will in addition introduce the methodology developed for determining the longwave radiative effect of stratospheric ozone and show first results also of its time evolution. The results will be put in the perspective of possible synergies and combined analysis with the high-vertical resolution measurements ozone and NOx species with ALTIUS.
Primary author
Dr
Pierre Coheur
(Université Libre de Bruxelles)
Co-authors
Dr
Catherine Wespes
(ULB)
Dr
Cathy Clerbaux
(LATMOS IPSL)
Dr
Daniel Hurtmans
(ULB)
Gaétane Ronsmans
(ULB)
Mrs
Stamatia Doniki
(ULB)
