Understanding the added value of the new generation of aerosol instruments for regional emissions estimations using Observing System Simulation Experiments (OSSE)

<p>The current generation of satellite sensors (such as AISI, CrIS, MOPITT, OMI, and POLDER) has a spatial resolution that is still too coarse for urban scale air quality monitoring or is not sensitive enough to the ground level. The Dutch S5p TROPOMI instrument has advanced significantly in studying reactive gases with daily coverage. With the upcoming launches of 3MI on MetOp-SG and SPEXone on NASA's PACE mission, remote sensing of aerosols will soon take a huge step forward. The infrastructure for air quality modeling will need to advance appropriately to get the most significant benefits from these technology expenditures.</p> <p>In order to assimilate satellite data from atmospheric chemistry missions on reactive trace gases and aerosols, this effort will ultimately integrate the regional model LOTOS-EUROS fitted with a Local Ensemble Transform Kalman Smoother (LETKS) data assimilation module. The data assimilation algorithm will be put into practice with the ability to optimize surface emissions. All simulations are performed in the European domain to be used as inputs for future high-resolution simulations of urban dynamics in the Netherlands. Finally, following the main objective mentioned above, we develop OSSEs (Observing System Simulation Experiments) to benefit future satellite missions, understanding the opportunities and challenges these observations will bring.</p>