China News Agency, Haikou, December 2 (Reporter Wang Xiaobin) Corresponding to green carbon on land, blue carbon in the ocean is a popular term recently.

Scientists from Tsinghua University, World Wide Fund for Nature (WWF) and other institutions gathered online and offline at the Climate Development Forum of the 2022 Global Science and Technology Impact Investment Conference held in Haikou on the 2nd to discuss China's "dual carbon" goals The development and utilization of blue carbon resources in the background.

  According to Lin Guanghui, a professor at the Department of Earth System Science at Tsinghua University, blue carbon in a broad sense refers to the processes, activities and mechanisms through which marine organisms absorb greenhouse gases mainly carbon dioxide emitted by human activities and store them in the ocean.

  "The blue carbon ecosystem can be said to be the most complex type of carbon cycle model in the world." Lin Guanghui believes that the development and utilization of blue carbon must first solve two problems, one is to find out the process mechanism of blue carbon, and the other is to accurately Estimating coastal blue carbon potential.

In this regard, he used satellite remote sensing, quadrat observations, and model calculations to estimate that the mangroves in Hainan have about 700,000 tons of carbon.

  Lin Guanghui also found in his research that the carbon sequestration capacity of a single species of mangroves is much lower than that of multi-species mangrove communities.

  Fan Wei, a professor at the Ocean College of Zhejiang University, pointed out that Chinese scientists have developed an "artificial upwelling" technology, which has advantages in improving the marine ecological environment, increasing productivity, and increasing carbon sinks.

  According to reports, the "artificial upwelling" technology relies on solar energy, wind energy and other complementary energy-supply floating platforms to evenly inject compressed air into the seabed to form rising bubbles, and bring the low-temperature seawater rich in nutrients on the seabed to the surface to realize fishery proliferation. resources, increasing marine carbon sequestration, and improving the marine ecological environment.

"We built a 150-acre demonstration project in Qingdao, Shandong, and the test results are very good. Now it has expanded to an area of ​​5,000 mu." Fan Wei said.

  Zhang Yimo, director of WWF's ocean and plastic program, said that if no changes are made, there may be more plastic than fish in the ocean by 2050, which will greatly affect carbon sinks.

"It is hoped that by reducing the use of plastics, the trend of weakening ocean carbon sequestration will be slowed down, and the carbon emissions caused by the use of plastics will be reduced at the same time."