The variability of spring sand-dust storm frequency in Northeast Asia from 1980 to 2011

摘要: The characteristic distributions of regional sand-dust storm (SDS) weather processes over Northeast Asia from 1980 to 2011 were investigated using the shared WMO surface station meteorological data, atmospheric sounding China high density NCEP/NCAR reanalysis as well archived original maps China. concentration-weighted trajectory (CWT) method was used calculate SDS frequency discrete data and track large-scale in Asia. A spline trend analysis employed investigate variability systems. results show that during 1980–2011, exhibit both a historical persistence abrupt transitions with an approximate 10-yr high-low occurrence oscillation. Through composite circulation low years, it is found occurrences are closely related anomalies arctic vortex midlatitude westerly, patterns around Lake Baikal. During meridianal flows upper mid troposphere above corridor East (from Balkhash along Northwest North China, Korean Peninsula, Japan Islands) apparently stronger than favoring development transport SDSs regions.