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Tornado-like waterspout caught on camera. Winter weather tips. Mostly dry. Wind will be generally light. Read More. Issued: 12 pm Thu 13 Jan local time Updates in: hr min s. Vietnam Ho Chi Minh City. Live weather reports from Ho Chi Minh City weather stations and weather warnings that include risk of thunder, high UV index and forecast gales. See the links below the day Ho Chi Minh City weather forecast table for other cities and towns nearby along with weather conditions for local outdoor activities.

Rain mm. Ho Chi Minh City Weather 4—7 days :. Weather Station Temp. Water that rises to the surface as a result of upwelling is typically colder and is quite rich in nutrients.

Basically, these surface waters often have high biological productivity. We can track that by looking at the amount of chlorophyll phytoplankton in the ocean. The comparison below shows the Chlorophyll concentrations in the last La Nina first image and during the same period in the El Nino event second image. This means more food is available for the fish, indicating a potentially good fishing season in the eastern equatorial Pacific.

We can see this upwelling effect directly when looking at the temperature by depth during a La Nina and an El Nino event. We can see much warmer waters in the upper-ocean layer, and cooler waters pushed deeper. But below we have the latest subsurface analysis of the current La Nina event. This is due to the upwelling effect, as the trade winds cause the deeper colder water to rise towards the surface.

This is a thin layer where the ocean temperatures drop significantly, separating the upper warm and deeper cold layers. In an El Nino, the thermocline layer is pushed deeper. That is due to the warmer waters from the west entering the region, warming the upper-ocean layers.

But generally, ENSO does indicate an important influence on the Jet stream in the Pacific Ocean, and consequently also around the world. The jet stream is a large and powerful stream of air wind at around km mi altitude. It flows west-to-east around the entire hemisphere, affecting the pressure systems, their strength, directly shaping our weather at the surface. Comparing the two phases of the ENSO on the next image below, we can see that they typically produce an entirely different winter weather pattern across North America, as they have a major influence on the position of the jet stream.

La Nina features a stronger and extended polar jet stream from Alaska and western Canada into the United States. But the El Nino features a stronger Pacific jet stream and an amplified storm track over the southern United States.

Looking closer at La Nina below, we can see that its main feature is a strong and persistent high-pressure system in the North Pacific. It usually bends the jet stream from the northwest down to the southeast, creating a dipole pattern over the United States. Alaska, western Canada, and the northern United States typically experience colder than normal winter, with more precipitation.

Southwest and the southern United States usually experience warmer and a bit drier conditions during La Nina winters. The shifted jet stream also means a different snowfall potential over the continent.

The colder air is more easily accessible to the northern United States, which also shows to have an increased snowfall potential during the La Nina winters. Especially areas like Alaska, western Canada, and the northern United States benefit from the northerly jet stream to produce more snowfall. But during an El Nino winter season, we have a strong and persistent low-pressure area in the North Pacific.

That pushes the polar jet stream further to the north, bringing warmer southerly flow to the northern United States and western Canada. The southerly Pacific jet stream is amplified, bringing storms with lots of precipitation to the southern United States. Looking at snowfall in the El Nino winters, we can see a much different picture than during the La Nina.

There is less snowfall in the northern United States during the El Nino winter season. The conditions are mostly warmer and drier than normal there. But there is more snowfall in the west-central United States and in the parts of the eastern United States. After passing Canada and the United States, the jet streams move out into the Atlantic.

There are different paths they can take. A lot depends on the overall circulation pattern and the existing pressure systems in the Atlantic. This is where ENSO generally perhaps loses its direct influence for Europe, as regional systems in the Atlantic take over.



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