Despite the ban on chlorofluorocarbons (CFCs) in the 2000s, an ozone hole keeps forming every year during late winter/early spring above Antarctica. The extremely cold winter temperatures, coupled to a strong polar vortex, enhance the ozone depleting effects of the CFCs in this region. In 2020, the Antarctic ozone hole started by mid-August and ended in late December. Unusually long and deep, it was due to remarkably cold stratospheric temperatures and exceptionally powerful polar winds.
Public authorities and the scientific community rely on space-based technologies as they offer unique and reliable information to globally monitor ozone daily. Data on the thickness of the ozone layer throughout the year, and everywhere on Earth, is also essential to estimate the recovery rate of this invisible layer that protects life on our planet.
In this context, the Sentinel-5P mission is screening the Earth’s atmosphere and quantifies different pollutants (O3, CO, NO2, SO2, aerosols…) with a great accuracy and spatial resolution. It also provides measurement continuity with precedent and ongoing atmospheric spatial missions (OMI, IASI and SCHIAMACHY). The data recorded are free of use and present great interest for monitoring air quality, greenhouse gas emissions, detecting and assessing the impact of polluting events.
In this webinar, we will download and process Sentinel-5P data, using the Python language to study the unusually large Antarctic ozone hole in October 2020.
Date: Thursday 5 August 2021 – 14:30 CEST
Duration: around 90 minutes, including Q&A session