Ningxia Key Laboratory of Meteorological Disaster Preventing and Reducing,Yinchuan 750002,China;
Ningxia Key Laboratory of Meteorological Disaster Preventing and Reducing,Yinchuan 750002,China;
Ningxia Meteorological Observatory,Yinchuan 750002,China;
Ningxia Meteorological Observatory,Yinchuan 750002,China;
Ningxia Meteorological Observatory,Yinchuan 750002,China;
climate change; torrential rain days; atmospheric circulation; formation mechanism; Ningxia;