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[1]: 33 For example, there are more rainy days in the drier season during winter in Yên Bái Province due to drizzle than there are rainy days in the main rainy season. [ 1 ] : 33 Drizzle is a weather phenomenon that is characteristic of the weather in winter in the north and north central coast.
Over India, a subtropical westerly jet develops in the winter season and is replaced by the tropical easterly jet in the summer season. The high temperature during the summer over the Tibetan Plateau, as well as over Central Asia in general, is believed to be the critical factor leading to the formation of the tropical easterly jet over India.
Mean annual rainfall in the country ranges from 700 to 5,000 mm (28 to 197 in) although most places in Vietnam receive between 1,400 to 2,400 mm (55 to 94 in). [5]: 33 The majority of rainfall occurs during the rainy season, which is responsible for 80%–90% of the annual precipitation.
Operation Popeye / Sober Popeye (Project Controlled Weather Popeye / Motorpool / Intermediary-Compatriot) was a military cloud-seeding project carried out by the U.S. Air Force during the Vietnam War in 1967–1972.
The East Asian monsoon is a monsoonal flow that carries moist air from the Indian Ocean and Pacific Ocean to East Asia.It affects approximately one-third of the global population, influencing the climate of Japan, the Korean Peninsula, Taiwan, China, the Philippines and Mainland Southeast Asia but most significantly Vietnam.
Central and Southern Vietnam, which have a tropical climate, have only two main seasons: a dry season and a rainy season. Miscellaneous cultural differences While Southern Vietnamese often ring in the Tết Nguyên Đán with yellow mai ( Ochna integerrima ) blossoms, Northern Vietnamese often prefer hoa đào ( peach ) blossoms.
Total rainy days within a year are between 120 and 170 days (the standard level of tropical regions is 150–160 days) with a total rainfall of some 1,500 - 2,750 mm. The average humidity is around 80 - 82% and humidity in the dry season is 10-12%, lower than that of the rainy season; humidity varies considerably between areas.
Vietnam has 2,360 rivers with an average annual discharge of 310 billion m 3. The rainy season accounts for 70% of the year's discharge. [365] Most of the country's urban water supply systems have been developed without proper management within the last 10 years. Based on a 2008 survey by the Vietnam Water Supply and Sewerage Association (VWSA ...