Pronounced subsidence leading to summer drought over southern Africa causes warmer than average surface air temperatures or even heatwave (HW) conditions. We investigated the occurrence of HWs during South based on station data and ECMWF ERA5 reanalyses. Temperature observations from African Weather Service were analyzed for seasonality long-term trends (1981–2020) as background variability HWs...

Heatwave events are of major concern in the global context, since they can significantly impact ecosystems, economies and societies. For this reason, more detailed analyses characteristics trends heatwaves represent a priority that cannot be neglected. In study, interannual decadal variability seven indices were investigated during warmest period year (June–August) by using an enhanced resoluti...

Northwestern North America has experienced an exceptional heatwave in late June 2021 with many new temperature records across western Canada, Oregon and Washington states. Here we use a recent atmospheric reanalysis conditional approach based on dynamical adjustment to assess quantify the influence of circulation other driving factors magnitude during 28–30 period. A blocking anticyclone, enhan...

Abstract Heatwaves are increasing in frequency, duration, and intensity ocean, coastal, lake ecosystems. While positive water temperature trends have been documented many rivers, heatwaves not analyzed. This study examined rivers throughout the United States between 1996 2021. Riverine increased frequency over period, with most robust increases occurring summer fall, mid‐ to high‐order streams,...