Global climate change has a significant correlation with human behavior, and human behavior will change the natural changes in climate. By studying Archives such as Ice core, it is found that there is a significant positive correlation between the temperature and the concentration of $CO_{2}$ in the history of the earth. Nowadays, human behavior makes the atmospheric content of $CO_{2}$ far exceed its normal level, which may cause global warming, melting of glaciers, etc., but it is only possible…

## 研究方法

### 直接法（研究现代）

1. 记录温度
2. 记录降雨量 (Precipitation)
3. 研究植被 (Vegetation)
4. 海平面
5. 冰川 (Glaciers) :: 主要通过研究冰盖融化与生成的Balance

### 间接法（研究历史）

1. Proxy
2. Archive e.g. “Ice Core” ::从冰层(Ice Sheet)中提取的分层的冰棍标本

### Ice Core分层原因

1. Snow (几小时，主要成分是空气)
2. Firn (几天，粒雪)
3. Glacial Ice (数年)

## 与人类

### 一个公式

$$Increase CO_{2} = Increasing Population + \Delta Emission per Person + Efficiency of CO_{2} Use$$

$$碳排量 = 人口 + 经济 - 科技$$

### 一个组织

Intergovernmental Panel on Climate Change (IPCC) 制定了一个小目标来限制各国温室气体排放，表示到2050年，全球二氧化碳排放量要卡一半。。这其实等同于将排放量和钱联系起来，给每个国家分一部分排放量，如果多排就要交钱来买。结果已经工业化完的发达国家切走了超过40%的蛋糕，国科大校长老丁表示这不能忍啊，发展中国家的人到底还有没有人权啊ヾ(´･ ･｀｡)ノ”

## 气候变暖影响

### Good

• 数据表明温度越高，世界范围战争数量越少
• 实验表明，温度高时，粮食等植被产量更高

• 南方动物（虫子）比植物北迁的快，北方无天敌，植物被虫子吃光
• 海平面上升，淹没苏州
graph TD A{Climate Change} B[Economy] C[Politic] D[Tech] E[Agriculture] F[Human Health] A --> |influence| E E --> |change| B E --> |change| C B --> |change| C B --> |determine| D C --> |determine| D B --> |influence| F D --> |affect| F D --> A C --> A D --> E E --> |Green Plant| A E --> F F --> E

## Concept introduction

### Weather and Climate

Weather refers to the state of the atmosphere in a short period of time, and climate research mainly focuses on the law of atmospheric state in a longer period of time. In short, climate is weather that changes periodically. The climate is regional and closely related to the distribution of land and sea with latitude. In a longer time dimension, we find that the Earth’s climate change also shows significant periodicity.

The figure above describes the historical temperature of the earth, which has obvious periodicity. It is worth noting that whenever the global climate warms, it will trigger an explosion of species. But now, it is in a small-scale temperature rise period, and the temperature rise rate is not too abnormal with historical data, so it is impossible to conclusively prove that it is related to human carbon dioxide emissions.

## research method

### Direct method (research modern)

1. Record the temperature
2. Record rainfall (Precipitation)
3. Research vegetation (Vegetation)
4. Sea level
5. Glaciers :: Balance, mainly through the study of the melting and formation of ice sheets

### Indirect Method (Research History)

1. Proxy
2. Archive e.g. “Ice Core” :: a layered ice lolly specimen extracted from the Ice Sheet

### Ice Core layering reasons

After snow cover, over time, snow cover will experience the following states:

1. Snow (a few hours, the main component is air)
2. Firn (a few days, snow)
3. Glacial Ice (several years)

### Time tracking method

Because the temperature of snow is different, the ice layer will change periodically in units of years, and the age of a certain ice layer can be obtained by counting the number of layers.

### Historical temperature research method

The ratio of ${}^{18}O/{}^{16}O$ in the atmosphere is closely related to temperature. Therefore, the current temperature can be indirectly inferred by measuring the isotope ratio of the corresponding position in the ice layer.
In addition, the concentration of $CO_{2}$ in each historical period can also be measured by a similar method.

## The study found

As can be seen from the above figure, in the history of the earth, the concentration of carbon dioxide has a close correlation with temperature. Until the past 150 years, this rule was broken, and the concentration of atmospheric carbon dioxide increased dramatically. People expressed panic ⌇●﹏●⌇

## With humans

### A formula

$$Increase CO_{2} = Increasing Population + \Delta Emission per Person + Efficiency of CO_{2} Use$$

This formula can also be translated as:

$$Carbon emissions = population + economy-technology$$

### An organization

The Intergovernmental Panel on Climate Change (IPCC) has set a small goal to limit greenhouse gas emissions in various countries, stating that by 2050, global carbon dioxide emissions will have to be half. . In fact, this is equivalent to linking emissions with money, giving each country a portion of the emissions, and paying for more emissions. As a result, the industrialized developed countries cut away more than 40% of the cake. The president of the National University of Science and Technology, Lao Ding, said that this is unbearable. Do people in developing countries have human rights? ヾ(´･ ･｀｡)ノ”

## Climate warming impact

### Good

• Data shows that the higher the temperature, the fewer wars worldwide
• Experiments show that when the temperature is high, the yield of vegetation such as grain is higher