190 1 weather

The earth is experiencing drastic climate change.

The ice sheet is melting, hurricanes and storms are becoming more intense, various places are experiencing greater floods, wildfires are happening more frequently, and high temperature weather and extreme drought are eliminating the whole water source. ................................................................................................................................

The earth sends out distress signals more and more frequently.

How have human activities and natural forces changed the earth?

The satellite map of Google Earth shows the changes of oceans, forests, glaciers, beaches and cities in our world from 1984 to 2020. About 24 million photos of Zhang Weixing recorded the changes of nature with time under the action of time delay.

Mato Grosso is located in the west of Brazil, where there are three different ecological regions: tropical alpine grassland, Pantanal wetland and Amazon rainforest. But it is the largest wetland and tropical rain forest in the world, most of which have been destroyed and cleared, and they are used for logging, agricultural use and pasture for human use.

Columbia Glacier is a famous relic of ancient ice sheet in the world, and it is also a watershed in the Pacific Ocean, Atlantic Ocean and Arctic Ocean.

From 1980, the glacier began to retreat rapidly. 200 1 year, the rate of glacier retreat reaches its peak, which can reach 30 meters every day on average. Satellite observation shows that Columbia glacier is one of the fastest changing glaciers in the world.

Glaciers become thinner and the bed of glaciers rises above sea level. At this point, the glacier lost contact with the ocean.

The Aral Sea was originally the fourth largest lake in the world, but now it has shrunk to the original 10%.

In the 1960s, the Soviet Union took water from lakes and planted cotton and other crops in the arid plains of Kazakhstan, Uzbekistan and Turkmenistan. Slowly, the lake dried up and the ecological environment was seriously damaged. Thousands of years of rivers were destroyed in 36 years.

The shrinking of Aral Sea is called "one of the most serious environmental disasters on earth".

Without the influence of climate regulation of such a large water body, this area becomes cold in winter and hot and dry in summer.

In the summer of 20 16, a glacier in Mount Aru, Tibet suddenly collapsed catastrophically, and huge glaciers and mudslides rolled down. This ice collapse is the biggest in history. It buried more than 65,438+00 square kilometers of land, causing 9 deaths and hundreds of livestock.

An international team of scientists led by Lei of China Academy of Sciences conducted field investigation, monitoring and analysis. Scientists have found that climate change is part of the cause of avalanches.

But more seriously, the ice layer of the avalanche will slowly melt, and they may merge into a huge super lake, changing the local ecology.

Elsewhere on the Qinghai-Tibet Plateau, expanding lakes will also cause floods, roads and other infrastructure problems.

This reminds us that the impact of climate disasters is not always immediate. Sometimes, they last for years.

Nearly half of the forests in the world have been cut down or degraded, but people have long realized the seriousness of deforestation. During the period from 20 15 to 2020, the deforestation rate is about100000 hectares per year, which is lower than the annual160000 hectares in 1990s.

Satellite maps show that agricultural expansion has led to large areas of forests being cut down.

Newfoundland and Labrador are the easternmost provinces in Canada. The collision of tectonic plates formed Newfoundland's unique geology.

Affected by global warming, the local annual average temperature has been 0.8- 1.5℃ higher than the historical standard, the permafrost in this area has melted, and the frequency of hurricanes and tropical storms has doubled.

Madagascar is an island with biodiversity; More than 90% of the wild animals on the island are not found anywhere else on earth.

Human activities have seriously threatened the island's diverse ecosystems and unique wildlife.

From 1950 to 2000, about 40% of the original forest area on the island disappeared and the remaining forest area decreased by 80%.

Dubai, which is full of sand, built a "desert miracle" by relying on sand imported from Australia. However, behind these sands is a huge sand mafia group. In order to get rich profits, they dig sand for construction and destroy beaches and islands.

Greenland is the largest island in the world, located between the Arctic Ocean and the Atlantic Ocean. In recent years, the retreat of Greenland glaciers has led to the rise of sea level. In 20 19, Greenland lost about 60 billion tons of ice in two months, causing the global sea level to rise by 2.2 mm. Experts speculate that if the Greenland ice sheet melts completely, the world sea level will rise by more than 7 meters.

Las Vegas, like Dubai, is a city built in the desert.

Since 1990s, Las Vegas has experienced rapid growth. It is one of the fastest growing metropolises in the United States and one of the most visited tourist destinations in the world.

Population growth needs a lot of water. Las Vegas in the desert meets its water demand by exploiting groundwater. However, this has also led to a sharp drop in the groundwater level in this area and a large area of land subsidence in the valley.

This is a melting glacier on the top of Okhotsk volcano in central and western Iceland. Geological map estimation 190 1 year Okj? Kull covers an area of about 38 square kilometers. 1978, aerial photography shows that the glacier has shrunk to about 3 square kilometers. Today, it is less than 1 km2.

Extremely dry weather has caused many fires in central and northern Australia.

Satellite images show the scars (black areas) left by the fire.

Human activities have a great influence on the climate.

The earth is changing all the time, but the changes of climate and environment often happen very slowly, which is hard for us to see. But these changes will continue to affect us and change our way of life.