A Discussion of Non-Linear Mechanism on Subtropical Anticyclone’s Extending/Shrinking Over East-Asia in Summer
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摘要: 采用三维强迫耗散非线性动力学模式,结合夏季东亚副热带地区实际的环流结构和天气特征,对东亚上空副热带反气旋的活动进行了研究和探讨,导出了系统稳定性的位涡拟能判据并据此进行了分析和讨论.所得判据可为分析和预报夏季东亚上空副热带高压的进退变化及相应的东亚天气提供参考依据.Abstract: Based on the actual circulation structure as well as weather characters over East-Asia subtropical region in summer,by using three-dimension non-linear forced/dissipated dynamic model,the activities of subtropical anticyclone over East-Asia have been studied and discussed.The potential enstrophy criteria of system stability have been derived and also been analysed.The criterion can provide useful reference for analysing and predicting subtropical anticyclone's extending/shrinking as well as corresponding weather over East-Asia in summer.
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Key words:
- subtropical anticyclone /
- potential enstrophy /
- stability criterion
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