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The northward propagation of intraseasonal oscillation (ISO) and mechanisms of intraseasonal oscillation of the observed rainfall in North and South of Vietnam are documented using ECMWF reanalysis and daily observed rainfall data from 1981 to 2009. It is found that Vietnam experiences a clear northward propagation of ISO of the zonal wind in boreal summer. This propagation possesses the largest component of the variation of the zonal wind in the South Asia region and leads to the active and break phase of rainfall in North and South Vietnam with the period of 30-40 days. However, there is a large difference between the mechanism of ISO rainfall in North and South Vietnam. Specifically, moisture from the tropical Western Pacific and Bay of Bengal fuels ISO convection in North Vietnam, whereas convection in South Vietnam energized by moisture from the tropical Indian Ocean only.

tạp chí khoa học đại học quốc gia hà nội: nghiên cứu giáo dục  (vnu journal of science: education research)/tạp chí khoa học đại học quốc gia hà nội: các khoa học trái đất và môi trường (vnu journal of science: earth and environmental sciences)

Sự dịch chuyển lên phía bắc của dao động nội mùa và cơ chế dao động nội mùa của lượng mưa tại Bắc Bộ và Nam Bộ