NH3 emissions derived from CRIS observations over Europe

Over the past century ammonia (NH₃) emissions have increased with human population growth and fertilizer usage. The abundant NH₃ emissions lead to climate change, reduction in biodiversity and affect the human health. Up-to-date information of NH₃emissions are essential to better understand the impact of NH₃. In this study we adapted the existing DECSO (Daily Emissions Constrained by Satellite Observations) algorithm for use of NH₃ observations from the Cross-track Infrared Sounder (CrIS) to estimate NH₃ emissions. By considering the interaction between NH₃ and NO_x, we implemented DECSO to estimate NO_x and NH₃ emissions simultaneously on 20 km resolution over European domain. NH₃ and NO_x emissions over Europe are derived for 2020 on a daily basis from CrIS and TROPOMI (on Sentinel 5p). Due to the sparseness of daily satellite observations of NH₃, monthly emissions of NH₃ are constructed and analysed.  The comparison of these emissions with other existing emission inventories will be presented.