Laser Space Demonstrates An Expansion Of The Sea

Exact location the laser is moving 300 miles above your head here. Launched in 2018, NASA’s ICESat-2 satellite is equipped with a lidar, the same type of technology that allows self-propelled vehicles to see in three rows by spraying lasers around the road as they navigate the road and analyze the return light. But instead of paving the road, ICESat-2 tests the earth’s climb with greater accuracy.

While a space laser doesn’t mean injury, it does natural disasters. Today in the newspaper Natural Communication, scientists explain how he used the new ICESat-2 technology to create a world map that is less than 2 meters above sea level, making it difficult to climb. As a result of this statistic, 267 million people are living in high-risk areas. Assuming an increase of 1 meter by 2100, it is estimated that 410 million people will live in the affected area. Asian countries such as Bangladesh and Indonesia are at high risk, but the United States and Europe will also not be at risk.

“We strongly believe that if the country is to cope with rising water levels and protecting the coastal environment – it is a matter of importance – rising levels should be identified,” says author Aljosja Hooijer, a flood risk specialist at the National University of Singapore and Deltares. research institute in the Netherlands.

The paperwork, Hooijer is under pressure, is based on a wide range of colors. First, he did without Enrollment is increasingly common in cities around the world, due to the uncertainty that arises in the census of people moving in. Currently, 55% of the world’s population lives in cities, which activities of the United Nations it will reach 68 percent by 2050. But this will never be the same – people in cities may rise faster than others, or even decline.

“The project has filled the greatest opportunity we have so far,” says Arizona State astronomer Manoochehr Shirzaei, who they learn to rise but I did not participate in this new study. Scientists have a good idea examples Shirzaei adds, “but if you want to know the extent of the flood, you have to know its rise. And it is not known.”

In the past, researchers used satellite radar to map. It works just like the lidar, but it just jumps off the floor instead of the laser. “The problem with radar is that it won’t allow it to enter the green space, just a little bit,” Hooijer said. “It stands somewhere between the roof and the ground, and its height is in the middle.” Lasers, on the other hand, penetrate easily into plants, providing the most accurate measurement. (You may have heard of how scientists use lidar to see the trees of the Amazon rainforest and map of ancient ruins hidden below.)

Hooijer found that 72 percent of people who may be at risk of overcrowding will live in the tropics. Tropical Asia alone will account for 59 percent of the area’s endangered areas, as the region is relatively low. Hooijer said: “This is a serious problem for developed countries – in Europe and in the States.” “But if you look at the road map, who will suffer the most, and probably soon? These are poor people, especially those who live in less prosperous places. It doesn’t really matter, that this is a hot spot. And we marveled at their multitude. ”

There is another problem: In addition to dealing with the rising sea level, cities are also drowning. Soil degradation is a wonderful thing floor coverings, usually as a result of extracting excess groundwater. Coastal cities tend to be less fortunate because of their geographical location, as cities have long been known to meet rivers. For thousands of years, a river would form a mound of earth, and the city would grow on top of it. But as the capital flows through the river, this clay falls like an empty water bottle, and the city can move with it. As the suburbs grow, people need hydrate, which in turn increases the amount and decrease of revenue.

Hooijer’s models also consider a reduction, but they use the same measurement – up to half a centimeter per year – worldwide instead of just calculating the cost of each beach individually. It would not be possible. However, researchers know that some areas are falling much faster: 10 inches per year. By 2050, 95% of northern Jakarta may have been in the water, due to rising tides is declining as the seas increase. The situation is so serious that Indonesia is planning to relocate its headquarters outside the city.