Conference proceedings ; Online: Influence of discontinuities in reanalysis ozone concentration data to trend values and significance
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
2023
Abstract: The aim of this poster is to investigate the influence of discontinuities to trend values in ozone concentration data and their significance from the following reanalyses: ERA-5, MERRA-2 and JRA-55. We use the ozone concentration data from all layers ... ...
Abstract | The aim of this poster is to investigate the influence of discontinuities to trend values in ozone concentration data and their significance from the following reanalyses: ERA-5, MERRA-2 and JRA-55. We use the ozone concentration data from all layers between 500 hPa and 1 hPa in the period 1980-2020 in January. This is important topic, because the presence of discontinuities influences the values of trends and their significance. Discontinuities arise from the changing in the assimilation procedure, introducing new observation to the reanalyse, and changing of data quality. There are dates which the occurrence of discontinuities is expected in: 2004- transition from SBUV to EOS Aura data and 2015- the 4.2 MLS data were started to use instead of version 2.2. We search for discontinuities in the following classes of extremity: 1 st , 10 th , 25 th , 50 th ,75 th ,90 th and 99 th percentile as well as the mean. Ozone data with high influence of the discontinuities to trend values and their significance is not suitable for trend analyses. |
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Subject code | 333 |
Language | English |
Publishing country | de |
Document type | Conference proceedings ; Online |
Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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