Impacts of Global Climate Warming on Meteorological and Hydrological Droughts and Their Propagations

Meteorological to hydrological drought propagation has been widely studied reflect the relationship between these categories and better understand mechanisms. However, global warming may alter features, which are not fully understood. This study aims investigate changes in meteorological conditions, especially their features 1.5–3.0°C warmer climates for 8,655 watersheds globally. First, three-month scale standardized precipitation index runoff calculated based on simulated by 15 climate models four models, respectively. Drought events then identified using run theory, followed calculation of (i.e., pooling, lag, lengthening) matched droughts. As a result, both conditions duration severity) would relieve due increased regions excluding Western North America, South Mediterranean, Southern Africa, East Asia, Australia. be more severe during from droughts over most regions. During propagation, worsening half serious first relieved with rising temperature. These results indicate that efforts slow down can suppress deterioration propagation.