What are the methods to judge the temperature in the northern and southern hemispheres? What winds blow in the northern hemisphere in winter?

Lead: The winter time in the southern hemisphere is different from that in the northern hemisphere. June-August in the southern hemisphere and12-February in the northern hemisphere. So, what kind of wind blows in the northern hemisphere in winter? What are the methods to judge the temperature in the northern and southern hemispheres? Let's have a look.

What winds blow in the northern hemisphere in winter?

The northern hemisphere blows northwest wind in winter and southeast wind in summer; In the southern hemisphere, the northeast wind blows in summer and the southwest wind blows in winter. Winter in the northern hemisphere is usually 65438+February to February, and summer is usually June to August, which is contrary to the four seasons in the southern hemisphere. The two most widely distributed climates in temperate regions of the northern hemisphere are: temperate continental climate and sub-frigid coniferous forest climate.

According to the inclination of the earth's axis, winter in the northern hemisphere begins from the winter solstice (about 65438+February 22) and ends at the vernal equinox in March (about March 20). Summer begins from the summer solstice (about June 2 1) and ends in vernal equinox in September (about September 2 1).

The northernmost part of the northern hemisphere is the Arctic Circle, and the North Pole is the northern end of the Arctic Circle. Its seasons can be roughly divided into winter and Leng Xia is cold, and the average temperature is lower than other areas. In winter, the Arctic will encounter the situation that the sun is below the horizon for one day or more, which is called extreme night. In summer, the sun will be above the horizon for one or more days in a row, which is called an extreme day.

This situation lasts at least one day in the Arctic Circle, and it can last for several months in areas close to extremes. The area south of the Arctic Circle and north of the Tropic of Cancer is a temperate zone in the northern hemisphere. Compared with the Arctic region, its temperature changes are mild, and extreme cold and extreme heat are rare. However, this mild climate is also prone to unpredictable weather. The climate in the tropical region of the northern hemisphere (south of the Tropic of Cancer and north of the equator) is often very hot all year round.

Generally speaking, it is rainy in summer and dry in winter. In the northern hemisphere, large objects passing through or above the ground level will move clockwise under the action of Coriolis force. Large air currents or ocean currents will do the same in the northern hemisphere, and the ocean currents in the North Pacific Ocean and the North Atlantic Ocean are the best examples. In the southern hemisphere, the direction is just the opposite.

Various methods to judge the northern and southern hemispheres

1, according to the distribution law of global temperature.

If the temperature decreases from south to north, it is the northern hemisphere; If the temperature decreases from north to south, it is the southern hemisphere.

2, according to the direction of the earth's rotation.

On the top view, if the earth's rotation direction is counterclockwise, it is the northern hemisphere; If the earth rotates clockwise, it is the southern hemisphere.

3. According to the law of latitude change.

Latitude increases northward, which is the northern hemisphere; The number of latitudes increases to the south, which is the southern hemisphere.

4, according to the deviation of the horizontal movement of the object surface to judge.

Because objects moving horizontally on the earth's surface are biased, if they are biased to the right, they are the northern hemisphere; If it leans to the left, it is the southern hemisphere.

5. According to the direction of ocean currents in the middle and low latitudes.

In the middle and low latitudes, if the ocean current flows clockwise, it is the northern hemisphere; If the ocean current flows counterclockwise, it is the southern hemisphere.

6, according to the horizontal airflow direction of cyclone and anticyclone.

If the horizontal airflow of cyclone converges counterclockwise, it is the northern hemisphere; If the horizontal airflow of cyclone converges clockwise, it is the southern hemisphere; If the horizontal airflow of anticyclone converges clockwise, it is the northern hemisphere; If the horizontal airflow of the anticyclone converges counterclockwise, it is the southern hemisphere.

7. Judging from the equator

The northern hemisphere is north of the equator and the southern hemisphere is south.

8. According to climate statistics.

If the coldest monthly average temperature is 1 or February, it is the northern hemisphere; If the coldest monthly average temperature is in July or August, it is the southern hemisphere.

9. According to the shadow of the noon object.

At noon, the shadow of an object always faces north, and the area north of the Tropic of Cancer is the northern hemisphere. At noon, the shadow of an object always faces south, and the area south of the Tropic of Capricorn is the southern hemisphere.

10, according to Polaris.

As long as Polaris can be observed, it must be in the northern hemisphere; The place where Polaris can't be observed must be in the southern hemisphere.