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中文摘要：
根据：2003年12月9日至15日的大、中潮同步水文观测资料及江门市斗门县气象局关于风的气象资料，结合Ecomsed三维斜压模型，对东北季风过程下的磨刀门垂向环流进行研究。通过理论分析和模型计算，表明向海的冬季风对河口垂向环流的形成起着重要的作用。风的作用有加强径流效果，加大了表层水体向下游的流动，同时底层水体的上溯使该地区形成了稳定的垂向环流。统计气象资料推断，枯季期间磨刀门水道出现垂向环流现象的时间约占总天数的51％。
英文摘要：
The Modaomen estuarine circulation under a winter monsoon is discussed based on the synchronously surveyed data of spring tide and moderate tide during Dec. 9-15, 2003 and data of wind from the weather bureau in Doumen county combined with ECOMSED 3-D baro- clinic model result. The result of theoretical analysis and model shows that winter monsoon plays an important role in the formation of estuarine circulation. Effect of runoff is strengthened by wind to increase the surface water layer flow to the downstream river, and simultaneously with the up-trace of the bottom waterlayer, the steady vertical circumiluence is formed. Wind can only affect the surface water layer, and the bottom layer is mainly affected by tide. Vertical circulation may exist in 51% of the days of dry season in the Modaomen channel accordingly the statistical data of weather.
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