Repository logo

Browsing by Subject "total water storage"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    An analysis of total water storage changes obtained from GRACE FO observations over the Venezia Islands area supported with additional data
    (Wydawnictwa AGH, 2021) Biryło, Monika; Rzepecka, Zofia
    The Venezia Islands are a very special area from the hydrological point of view due to its water mass changes. Regular floods results in the need for the regular monitoring of water mass changes. For this purpose, a Gravity Recovery and Climate Experiment mission (GRACE) can be used as a source of data. The aim of the paper is to compare the latest results of the new GRACE FO observations. The comparisons were carried out all over Venezia Island using the L3 level, RL06 release data obtained with spherical harmonics degree and order extension of up to 120, by the three most important computational centres: JPL, GFZ, CSR. Results are compared to an average month values of precipitation and evapotranspiration and tide gauge data in the nearby area. Based on the research, no dependence between TWS and evapotranspiration and evapotranspiration change were found.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Drought assessment and forecasting according to the Köppen–Geiger climate classification using GRACE and MERRA observations
    (Wydawnictwa AGH, 2026) Birylo, Monika
    Prolonged and recurrent droughts are a problem of the 21st century. Agriculture, grazing, fires, logging, and mining make soil susceptible to permanent degradation. However, well-managed land can recover from long drought cycles. Because drought is increasingly affecting larger areas, continuous monitoring and risk assessment are essential. Satellite-based models provide global observations of the Earth and enable their assessment using indices, thereby supporting the classification of the examined areas. In this study, the Combined Climatological Deviation Index (CCDI) and the Water Storage Deficit Index (WSDI) were calculated to evaluate drought sensitivity in Europe, within its climatic zones according to the Köppen–Geiger classification. Based on the research, it was concluded that almost all areas show a tendency towards drying, and the predictions indicate that the current drought conditions and their pace will continue. The CCDI and WSDI are very useful in studies of drought in Europe.