Ask a question about the westerly wind belt.

I hope the methods I know by heart can help you.

If you understand the reasons for the formation of westerly winds in the northern hemisphere, then the same is true in the southern hemisphere.

First of all, understand the left-hand rule and right-hand rule for judging the geostrophic deflection force.

Left rule – for the Southern Hemisphere.

The four fingers are pointed together towards the low pressure zone, and the direction known by the thumb is the direction of the geostrophic deflection force at that position.

is to the left. The right-hand rule – applicable in the Northern Hemisphere.

is to the right. **The left and right here are in a relative direction, but they all say that the high pressure zone points to the low pressure zone, and then the northern hemisphere deviates to the right, and the southern hemisphere deviates to the left.

Through the wind belt pressure belt map, it can be clearly seen that the westerly wind belt in the southern hemisphere is the air flow from the subtropical high pressure belt in the southern hemisphere to the subpolar low pressure belt (at this time, you can draw an arrow from north to south on the map to indicate its initial direction), under the action of geostrophic deflection force, the left deviation, and finally become the westerly wind, where the westerly wind belt is formed.

I haven't been exposed to geography for three years, and I can still answer this kind of question, at least in language, thanks to my relative's geography teacher, who taught me a good method, well, thanks to my lovely geography teacher!!

The geostrophic deflection force is deflected to the right in the northern hemisphere and to the left in the southern hemisphere, which is relative to us in the northern hemisphere, so the general judgment method is to use the right hand in the northern hemisphere, the left hand in the southern hemisphere, and the four fingers together to point to the direction of the arrow, at this time the direction of the thumb is the direction of the geostrophic deflection force.

Therefore, the airflow from the subtropical high to the sub-low should have formed a southerly wind in the northern hemisphere, and it was deflected to the right to the west under the influence of the geostrophic deflection force, (judged by the right hand), and the north wind should have been formed in the southern hemisphere, and the westerly wind was formed by the geostrophic deflection force to the left (judged by the left hand, the direction caused by the thumb is the direction of action, and the left in the southern hemisphere is equivalent to the right hand in the northern hemisphere), you just need to remember the judgment method of the right hand in the northern hemisphere, and the left hand in the southern hemisphere.

The westerly wind belt in the southern hemisphere is the northwest wind belt, and the northern hemisphere is the southwest wind belt.

As for the geostrophic deflection force, you use your left hand in the southern hemisphere, with the palm facing up, and the four fingers pointing to the initial direction of the high pressure to the low pressure in the ideal state, and the thumb direction is the direction of the deflected wind, and the same is true for the northern hemisphere, using the right hand. I've made it clear, concise and to the point, and it will definitely solve your problem.

Westerly windsLocated in the south30 degrees north latitudeand 60 degrees.

In the Northern Hemisphere, at 30 degrees north latitude, the air brought by the Hadley circulation from the equator cools and sinks when it reaches 30 degrees north latitude, forming a high pressure. At 60 degrees north latitude, warmer air meets cold air blowing from the polar regions, and the light warm air rises along the front of the cold air, forming a low pressure. The difference in hail at high and low pressure gives the air a thrust from south to north.

However, the wind, which was supposed to blow from south to north, was "bent" by a mysterious force, which is the "Coriolis force, which is the rotation of the earth."

caused. In this mysterious force.

Driven by , the mid-latitude winds deflected eastward, changing from southerly to westerly.

The reason why the westerly wind belt is strong and persistent.

The strong and persistent winds of the westerly wind belt are mainly due to the following two reasons, the first is that the rotation of the earth plays a leading role in the direction of air flow, according to the atmospheric circulation.

The general structure, the mid-latitude airflow is transported to the poles.

That is to say, in the northern hemisphere, the mid-latitudes should be the south wind, and the southern hemisphere is the north wind, but the deflection force generated by the earth's rotation from west to east will always act on the right side of the forward direction, so that the south wind will be transformed into a southwest wind, and the north wind will change to a northwest wind, and the deflection force will increase with the increase of latitude, and the role of this force in the middle latitude cannot be ignored, which is the most direct factor for the prevailing westerly wind in the westerly wind belt. Secondly, the temperature difference in the mid-latitudes is large, the heat consumption is also large, and the convection up and down is strong, causing strong winds.

Westerly Wind Range: Mid-latitudes in the Northern and Southern HemispheresSubtropical high pressure zoneBetween it and the subpolar depression zone is the zone where the hot air rising from the heat over the equator meets the cold air over the polar regions.

Near the surface, westerly winds are more pronounced in the Southern Hemisphere. in North America.

and the western part of Europe, due to the influence of the westerly wind belt, the temperate oceanic climate is formed.

and Mediterranean climate.

Nature fluctuations:

The troposphere of the Southern and Northern Hemispheres.

The pelagic layer surrounds the westerly airflow at mid- and high-latitude levels. Due to the fluctuations of different scales and the superposition of various vortices, it usually appears in a fluctuating state. There are mainly three kinds of pure mountain fluctuations with different properties:

Shortwave: The wavelength is about 1000 kilometers, and the position of the shortwave trough line and ridge line slopes to the west with the height of the trouser god, and the intensity decreases with the height.

Ultra-long wavelength: The wavelength is 8000 km, which is most obvious on the 5-day average or monthly average graph, and its generation is related to the distribution and topography of land and sea. Various eddies in the westerly wind belt, such as blocking high pressures, high pressure ridges and troughs of low pressure, cutting off the formation and development of low pressure, are closely related to fluctuations.

The equatorial low pressure, the temperature is high, the air expands and rises due to heating, the air pressure becomes low, the subtropical high pressure changes, and the air at high altitudes accumulates and sinks, forming high pressure.

In the subpolar low pressure, the cold and warm air meet near the subpolar low, and the warm air is lifted to form a low pressure.

Polar high pressure, low temperature, air cooling sinks, forming high pressure.

Therefore, sinking forms high pressure, and rising forms low pressure; sinking or cooling sinking or stacking sinking; Rising or heating rising or warm air being lifted.

The westerly wind belt is located between the subtropical high pressure belt and the subpolar low pressure belt, and the wind blows from the subtropical high pressure belt to the subpolar low pressure belt, and the northern hemisphere deflects to the southwest wind due to the geostrophic deflection force. The Southern Hemisphere deflects to northwesterly winds.

Hope it helps.

The air flow emitted by the subtropical high to the subpolar low is deflected into a westerly wind (southwest in the northern hemisphere and northwest in the southern hemisphere) under the action of geostrophic deflection force, so the westerly wind is the prevailing wind in the westerly wind belt. In areas under their control, westerly winds are generally strong and persistent, with strong winds and waves over the ocean, and mild and rainy windward slopes on land.

At this time, the warm and humid airflow in the south is relatively strong, and the atmospheric water content is abundant, showing the phenomenon of high temperature and heavy humidity in a slag bucket bucket, and this airflow is easy to cause heavy precipitation once it collides with cold air; And because the cold air is relatively weak, this kind of heavy precipitation moves slowly and lasts for a long time, which is easy to cause heavy rain, such as grinding into strong "dragon boat water".

It seems that your teacher was negligent, and there is one in the southern and northern hemispheres of the prevailing westerly belt and the polar easterly belt.

Westerly wind: southwesterly winds in the northern hemisphere and northwest winds in the southern hemisphere.

Easterly winds: northeasterly winds in the northern hemisphere and southeasterly winds in the southern hemisphere.

Therefore, it is usually said that the east wind belt, the west wind belt.

There is no width, you just need to know that the three latitude zones of low, medium and high correspond to the trade winds, westerly winds, and polar easterly winds.

The equatorial region, subtropical region, subpolar region, and polar region are low, high, low, and high pressure, respectively. All wind bands are blown from high pressure to low pressure and then deflected by geostrophic deflection forces.

In this way, it is easier to remember the air pressure belt and the wind belt, and you can also remember the principle.

The westerly wind belt prevails, with southwesterly winds blowing in the northern hemisphere and northwest winds blowing in the southern hemisphere; In the polar easterly belt, northeasterly winds blow in the northern hemisphere and southeast winds blow in the southern hemisphere.

Why is it called the prevailing westerly wind belt and the polar easterly wind belt? This is because the higher the latitude, the greater the geostrophic deflection force, and the greater the angle of wind direction deflection, similar to the westerly and easterly winds.

The northern hemisphere subtropical high is formed by the air from the equator gathering and sinking over the sky near 30°, and in winter, due to the southward shift of the direct solar point, the air from the equator to the north decreases, so the winter subtropical high weakens. The westerly wind belt is located between the subtropical high and the subpolar depression belt, which is caused by the pressure difference between the two. Although the subtropical high has weakened, the subpolar depression has strengthened.

On the other hand, it can be explained that in summer, the temperature difference between north and south is small, so the pressure difference is small, so the wind is small; In winter, the temperature difference between the north and the south is large, so the pressure difference is large, so the wind is strong. This is why the Normandy landings during World War II were chosen in summer.

Hope it helps.

Because in the northern hemisphere winter, the sun shines directly on the southern hemisphere, and the pressure belt and wind belt move southward, causing the northeast trade wind belt and the polar easterly wind belt to weaken, so the subtropical high will weaken. The westerly wind is the subtropical high blowing to the subpolar depression belt, and when the subtropical high weakens, the westerly wind belt weakens. Summer is the opposite.

The westerly wind belt is a planetary wind belt located between the subtropical high pressure zone and the subpolar low pressure zone (roughly between 30 and 60 degrees north and south latitudes). The air flow from the subtropical high to the subpolar low is deflected into a westerly wind (southwest in the northern hemisphere and northwest in the southern hemisphere) under the action of geostrophic deflection force, so the westerly wind is the prevailing wind in the westerly wind belt. In areas under their control, westerly winds are generally strong, winds and waves are strong over the ocean, and the windward slopes on land are mild and rainy.

Hope it helps.

The westerly wind belt generally refers to the mid-latitude westerly wind, and there is also an "equatorial westerly wind". The mid-latitude westerly wind belt refers to the westerly wind belt where the subtropical high blows to the subpolar low pressure area, and the wind direction is actually dominated by southwest winds (northern hemisphere) or northwest winds (southern hemisphere).

Near the surface, the mid-latitude westerly winds are subtropical high to the south and subpolar low to the north, forming a huge horizontal pressure gradient force in the middle, resulting in air flowing from the subtropical high to the subpolar low. Combined with the bias force of the floor tiles, the westerly winds in the mid-latitudes are dominated by southwesterly winds (northern hemisphere) or northwesterly winds (southern hemisphere).

The distribution range of westerly winds in the middle latitude is roughly between 35° and 60° north and south latitudes, and the distribution range is different in different places and different seasons.

Chinese name:

English name of the westerly wind belt:

westerlies

Definition: A region approximately between latitudes 35° and 65° in the northern and southern hemispheres, where air movement is predominantly west-to-east, especially in the upper middle troposphere and the lower stratosphere. Near the surface, westerly winds are more pronounced in the Southern Hemisphere.