Long term changes of the sub-daily precipitation extremes in the Carpathian basin

The warming climate evokes increasing frequency of extreme precipitation in some region. Better understanding of the processes that cause extreme precipitation events under the current climate could support the climate model simulations. The investigation of the sub-daily precipitation can help understanding of the nature and drivers of precipitation extremes.

Automatic stations replaced the ombrometers in many places in Hungary particularly from the late 1990s. According to the recent practice the 10 min precipitation data are stored at the meteorological database at the Hungarian Meteorological Service. In a recent a project we have possibility to digitize ombrometer registering papers. We decided to enter the 10 min sums from the registering paper as it could have been measured by the automatic weather station. As a result of the digitization process 10 in rainfall depth for five stations will be available for trend analysis to detect changes from the first half of the early 20th century.

A set of hydroclimatic indices on 1-hour sum have been defined in the INTENSE project is in correspondence with the World Climate Research Programme (WCRP)'s Grand Challenge on 'Understanding and Predicting Weather and Climate Extremes' and the Global Water and Energy Exchanges Project (GEWEX) Science questions. Some of the indices defined in INTENSE and implemented in INDICES computer program developed at Newcastle University describes the maximum rainfall totals and timing, the intensity, duration and frequency of heavy precipitation, frequency of rainfall above specific thresholds and some of them is related to diurnal cycle. A few of these indices are analysed for Hungary in this work. We also refer for the joint effort in the recent past in the Carpathian Basin focusing on the change of the sub-daily precipitation extremes (Lakatos et al., 2021).

Lakatos, M.; Szentes, O.; Cindrić Kalin, K.; Nimac, I.; Kozjek, K.; Cheval, S.; Dumitrescu, A.; Irașoc, A.; Stepanek, P.; Farda, A.; Kajaba, P.; Mikulová, K.; Mihic, D.; Petrovic, P.; Chimani, B.; Pritchard, D. Analysis of Sub-Daily Precipitation for the PannEx Region. Atmosphere 2021, 12, 838. https://doi.org/10.3390/atmos12070838

Acknowledgements:

The research presented was carried out within the framework of the Széchenyi Plan Plus program with the support of the RRF-2.3.1-21-2022-00014 National Multidisciplinary Laboratory for Climate Change project.