What effect does solar activity have on the earth's climate?

The relationship between solar activity and global climate change is also obvious. Climate change on the earth is closely related to the cycle of sunspot number change, but its specific mechanism is still unclear.

The interannual variation of precipitation in many parts of the world is related to the 1 1 annual cycle of sunspot activity. In addition, we have just found that the annual rings of many very old trees in the sub-cold zone have regular density changes, corresponding to the 1 1 annual cycle of sunspot activity.

At the same time, it is found from the statistical data that in the peak year of sunspot activity, the probability of specific abnormal climate on the earth increases obviously; On the contrary, in the low peak years of sunspot activity, the climate on the earth is relatively stable.

In addition, the change of the earth's upper atmosphere is also related to solar activity. Earthquake, hydrology, meteorology and other studies have explained the influence of solar activities on the earth, and the physical mechanism in this regard is still under study.

Extended data:

First, the phenomenon of solar activity

1, spot: bright tissue appearing at the edge of the photosphere of the sun, and extending outward to chromosphere is the spectral spot. Light spots generally surround sunspots and are closely related to sunspots.

2. Spots: Spots on the photosphere of the sun that are brighter than the surrounding areas.

3. Solar wind: The charged particle stream formed by the solar wind caused the aurora on the earth.

4. Flare: Strong short-wave radiation will cause drastic changes in the earth's ionosphere. It has a great influence on mankind. Causing short-wave communication interruption.

5. Prominence: During the total solar eclipse, the sun is surrounded by a red ring with a bright red flame beating on it. This flame-like object is called a prominence.

6. Corona: The corona is the outermost layer of the solar atmosphere (including the photosphere and chromosphere), with a thickness of over several million kilometers. The corona temperature is 1 10,000 degrees Celsius and the particle number density is 10 15m3. At high temperature, atoms such as hydrogen and helium have been ionized into positively charged protons, helium nuclei and negatively charged free electrons. The corona can only be seen during a total solar eclipse and when corona instruments are used.

Second, related applications

It can be seen from the influence of solar activity on the earth that it is very necessary to forecast solar activity. At present, this work has been carried out in many countries, including China. Through forecasting, communication departments, aerospace departments and other related departments can take timely measures to reduce the impact of solar activities on the work of these departments, and can also provide information for accurate weather, climate, hydrology and earthquake forecasting.

Baidu encyclopedia-solar activity