An OSSE to Study the Impact of Sentinel S4, S5P and S5 Spaceborne Observations on Air Quality Data Assimilation Systems
Tuesday, 15 December 2015: 10:35
3006 (Moscone West)
ISOTROP (Impact of Spaceborne Observations on Tropospheric Composition Analysis and Forecast) is an ESA funded OSSE study. It's aim is to quantify the impact of the European Sentinel 4 (GEO) and 5 (LEO) measurements of ozone, CO, NO2 and HCHO to better constrain pollutant concentrations and precursor emissions that influence air quality. The project is based on a cross-OSSE approach which involves two independent air quality models. Each of the models generated the nature run for the other model, used subsequently in two linked OSSE studies. The models involved are MOCAGE, and the air quality model LOTOS-EUROS combined with the global TM5 chemistry-transport model. The work is based on state-of-the-art synthetic observations and their error characteristics derived by the KNMI and FMI teams involved in the TROPOMI retrieval algorithm development. In our contribution we will discuss the ISOTROP OSSE setup, synthetic observations and impact of the sentinel observations on high-resolution (7km) air quality analyses for Europe.