Indian immigrant circle

Will, just will, the meaning of the future will be used from a scientific and rigorous point of view, because the future contains uncertainty.

What you mentioned above is only a small phenomenon of global warming, not a real problem.

1, global warming leads to the melting of two-stage ice sheets, which is a direct phenomenon. Yes, of course, sea level rise is not false, so it is reasonable for low-altitude areas to be submerged.

2.

"The hottest year in history will appear" is basically a key aspect of the problem.

What makes you say that? /How can it be?

A. The global climate is a fragile balance, which will be broken once it reaches a critical point, thus leading to great changes until a new balance reappears.

B, I understand that the earth's climate is in the law of glacial period (cold period) and interglacial period (relatively warm period), and we are currently at the end of interglacial period.

C, understand that the global climate has been in a relatively balanced warm period in the last 10 thousand years, and there has been basically no change. This is basically unchanged, and it is an "abnormal phenomenon" for the climate history of the earth.

3. From the general understanding of global warming.

Atmospheric climate is a very fragile system, and it is often possible to break this fragile balance with a slight change.

First of all, the main temperature in the northern hemisphere comes from below 35 degrees north latitude, and the ocean current in the Atlantic Ocean is the most important model. The important reason of Atlantic ocean current is hot salt circulation. The heat transported from the Atlantic Ocean to the northern hemisphere is about 1/4 of the total heat in the north.

Simply put, it is like this:

The Atlantic Ocean current transfers heat to the northern hemisphere in the form of ocean current, which is about 700 meters deep and over 65,438+000 kilometers wide. Near the North Pole, the sea water sinks, bringing the cold northern sea water from the bottom of the sea back to the hot south, thus forming a cycle.

The greenhouse effect warms the climate, and the glaciers in the north melt to form fresh water. However, the density of fresh water is lower than that of seawater, which affects the sinking and northward return of the Atlantic Ocean current. Heat transfer is affected. 13000 years ago, glaciers in the north melted to form freshwater lakes. When the ice dam of this lake finally melted, it injected about 12 trillion cubic meters of fresh water into the North Atlantic. This led to the cessation of the Atlantic warm current. Thus an ice age of about 1000 years was formed.

At present, the arctic sea ice melts about10.5 trillion cubic meters of fresh water every year, which affects the Atlantic warm current. The heat decreased and the fragile climate balance began to be slowly broken.

At this time, the climate changes with the changes of ocean currents and heat, so the original climate in some areas will change, and snowstorms, hurricanes and floods are all formed for this reason.

Your second point above is too old.

At present, the thickness of Arctic sea ice is 1.8m, which is 60% of 3M 60 years ago. The main function of sea ice is to prevent the massive injection of fresh water in the north. According to the present form, it is estimated that it will be 10 years faster and 50 years slower. The sea ice in the north will melt completely in a summer (or not, if the sea ice is thin enough, it will not prevent fresh water from going south), and a large amount of fresh water will be injected into the Atlantic Ocean. The fragile climate balance is bound to be broken. It is very likely that the North River period has come.