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[1]: 27 Because all of Vietnam lies between the southern and northern limit of the polar front, Vietnam's climate are both influenced by polar air and tropical air (from the tropical convergent zone). [1]: 27 In Vietnam, the monsoon circulation is a combination of both the South Asian and Northeast Asian monsoon systems.
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.
English: Vietnam map of Köppen climate classification. Date: 20 February 2016: ... Click on a date/time to view the file as it appeared at that time. Date/Time
The rates of change predict the state of the atmosphere a short time into the future. The equations are then applied to this new atmospheric state to find new rates of change, which predict the atmosphere at a yet further time into the future. This time stepping procedure is continually repeated until the solution reaches the desired forecast time.
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.
In time series data, seasonality refers to the trends that occur at specific regular intervals less than a year, such as weekly, monthly, or quarterly. Seasonality may be caused by various factors, such as weather, vacation, and holidays [1] and consists of periodic, repetitive, and generally regular and predictable patterns in the levels [2] of a time series.
Climatological normal or climate normal (CN) is a 30-year average of a weather variable for a given time of year. [1] Most commonly, a CN refers to a particular month of year , but it may also refer to a broader scale, such as a specific meteorological season . [ 2 ]
A rainfall simulator can be distinguished by the type of frame it uses: A box rainfall simulator has a rectangular frame. A Norton ladder simulator is distinguishable by its large triangular frame. A rotating boom simulator is a permanent simulator with similarities to a center pivot irrigation system.