Seasonal propagation directions of Dandong (red dots) and Lhasa (blue dots) (IMAGE)
Caption
In spring, southeastward propagating events are scarce at Dandong due to strong eastward background winds, while Lhasa exhibits similar directional constraints. During summer, both stations are dominated by northeastward propagating AGWs, influenced by southwestward wind fields. Autumn shows divergent source mechanisms: events at Dandong primarily originate from wind shear, whereas Lhasa's waves are triggered by convective weather, with source locations determining propagation trends. Winter features predominant southwestward propagation at Dandong under eastward wind influence, while Lhasa's southeastward trend may result from secondary wave generation, requiring further investigation.
Credit
Beijing Zhongke Journal Publising Co. Ltd.
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License
CC BY