What Is a Climate Comparison?

Climate, a natural science term, is a long-term average state of the physical characteristics of the atmosphere. Unlike weather, it has stability . Time scales are months, quarters, years, years to hundreds of years. According to the World Meteorological Organization (WMO), a standard climate calculation takes 30 years. Climate is measured by the characteristics of cold, warm, dry, and wet, and is usually characterized by the average value and dispersion value of a certain period. The discipline that studies climate is climatology.

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Solar radiation factor, underlying factor, atmospheric circulation factor and human activity factor. The solar radiation factor is the fundamental source of power for the climate. Such factors are: latitude factor. Underlying surface factors play a very important role in climate formation. Such factors are: ocean currents, ground vegetation, terrain and geology.

The atmospheric circulation factor itself is a component of the climate and has a direct impact on the formation of a certain place's climate. The main factors are: the average state of the air mass, the average state of the airflow, and so on.

The influence of geographical factors on the formation of climate is manifested in the shape of the earth, the movement of the earth, the distribution of land and sea, the topography and air currents, and the ocean currents. However, the influence of geographical factors on the formation of climate can be mainly attributed to radiation.

Latitude Factors Earth Shape and Movement

Different geographic latitudes, different heat received, cause different climates; usually, the higher the latitude, the lower the temperature; the most precipitation in the equatorial area, the least precipitation near the poles.

The basic elements of climate are temperature and precipitation. There are also other non-essential elements that have less influence.

Climatic characteristics

1. The climate is complex and diverse. China has a vast territory, a wide latitude, and a large distance from the sea. In addition, the terrain is different in height and height, and the types of terrain and mountains are diverse. Therefore, the combination of temperature and precipitation forms a variety of climates. From the perspective of climate types, the eastern part is a monsoon climate (which can be divided into subtropical monsoon climate, temperate monsoon climate, and tropical monsoon climate), the northwest is a temperate continental climate, and the Qinghai-Tibet Plateau is an alpine climate. From the perspective of the temperature zone, there are tropical, subtropical, warm temperate, moderate temperate, cold temperate and Qinghai-Tibet Plateau. Judging from the division of dry and wet regions, there are humid, semi-humid, semi-arid, and arid regions. And the same temperature zone can contain different wet and dry areas; the same dry and wet area contains different temperature zones. Therefore, in the same climate type, there will be differences in heat and dryness. The complex and diverse terrain also makes the climate more complex and diverse.

Since the late Quaternary Pleistocene, it has been around 11,000 years ago, and it is also called the late ice age. This period of time is roughly equivalent to the era of human history. Regarding the climate during this period, Norwegian glaciologists have made snow line elevation maps for nearly 10,000 years, indicating that the snow line elevation range is not small, indicating that the climate has changed significantly since the late ice age. China has a long history of records. Zhu Kezhen collated and analyzed these records and found that China's climate over 5,000 years has 4 warm periods and 4 cold periods alternate.

It was the first warm period from 3000 BC to 1000 BC, that is, from the Yangshao cultural era to the Anyang Yinxu era.

From around 1000 BC to 850 BC (early Zhou Dynasty), there was a short cold period with an average annual temperature below 0 ° C.

From 770 BC to early AD, the Qin and Han dynasties, it entered a new warm period.

From the early AD to 600 AD, that is, the Eastern Han Dynasty, the Three Kingdoms, and the Six Dynasties, it entered the second cold period.

From 600 AD to 1000 AD, the Sui and Tang Dynasties, is the third warm period.

From the year 1000 to 1200, the Southern Song Dynasty was the third cold period, and the temperature was about 1 ° C lower than that of modern times.

From the year 1200 to 1300, that is, the end of the Song Dynasty and the beginning of the Yuan Dynasty, it was the fourth warm period, but this time it was not as warm as the Sui and Tang Dynasties. , Guangdong, Yunnan and other places.

After 1300 AD, that is, since the Ming and Qing dynasties, it was the fourth cold period, and the temperature was 1-2 ° C lower than modern times.

In the past 5000 years, although the cold and warm periods have alternated, the general trend has changed from warm to cold. The cold period is longer than once and colder than once. In the second cold season, only the Huaihe River was frozen in 225 AD. In 1670, the fourth cold period, the Yangtze River was almost frozen.

The interesting things are:

The establishment and development of the Climate Group was supported by the then Prime Minister of the United Kingdom Mr. Tony Blair and more than 20 business people and government leaders from North America, Europe and Australia. The Climate Organization is committed to actively cooperating with government departments, business enterprises and non-profit organizations, focusing on solutions to problems, and promoting business and government departments to play a leading role in tackling climate change and develop low-carbon economic development models, while continuously promoting their Improve profitability and competitiveness, and encourage the sharing of successful experiences.