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Based on temperature sensor technology, China has developed an advanced ocean heat flux meter
[ Instrument R & D ] From a distant outer space overlooking the earth ’s homeland on which humans depend, we will find that through a thin and non-stop atmosphere, a planet with a large surface area covered by a large blue sea is presented in Under the public's vision. According to scientific statistics, at present, the total area of ​​the ocean on the earth is about 360 million square kilometers, accounting for about 71% of the surface area of ​​the earth, and the volume of seawater is more than 1.35 billion cubic kilometers. Such a huge proportion of the area is destined to have irreplaceable significance for the ecosystem of the entire earth.
Different from terrestrial ecosystems, the global ocean is a large ecosystem, which contains many secondary ecosystems of different levels. Each secondary ecosystem occupies a certain space, and interacting organisms and non-organisms form a unity with certain structure and function through energy flow and material flow. As we all know, although people divide the world ’s oceans into several oceans and some subsidiary seas, they are not isolated from each other. The movement of seawater will affect the interaction of global seas, and this also constitutes the difference with terrestrial ecosystems. .
In fact, in addition to driving the coordinated operation of the entire marine ecosystem, the flow of seawater also undergoes subtle energy exchanges with the atmosphere, which in turn participates in the atmospheric cycle and affects global climate change. The complex interaction process between the ocean and the atmosphere is accomplished through the channel of the sea-air interface. With the help of this channel, the heat energy exchange between the ocean and the atmosphere will have a strong influence on the structure of the atmospheric boundary layer, the structure of the ocean circulation and the transportation of marine materials. Therefore, scientific observation of the sea-air coupling interface is an important research direction to grasp the interaction mechanism between the ocean and the atmosphere.
At present, with the rapid development of science and technology and the deepening of research on the interaction between the ocean and the atmosphere, the atmospheric boundary layer observation technology at the sea-air coupling interface has become increasingly mature, making significant contributions to the field of sea-air flux research. However, due to the limitations of current observation methods and technologies, it is still unclear how much heat is input into the ocean and how much heat the ocean feeds back to the atmosphere. Researchers have not developed a science that can directly observe the heat flux of the upper boundary layer of the ocean. instrument.
Recently, the team of Shang Xiaodong of the South China Sea Institute of Oceanography, Chinese Academy of Sciences has made new progress in the study of ocean heat flux, and related research results were published in Acta Oceanologica Sinica. It is understood that the research team led by Shang Xiaodong, with the support of the national "Eleventh Five-Year" High-Tech Development Research "863" project, has developed an ocean detection rapid temperature sensor with a fast response time (response time 7ms). On the basis of this research technology, after more than ten years of technical research and breakthroughs, the research team has independently developed and manufactured a heat flux that can directly observe the upper boundary layer of the ocean under the support of the research equipment development project of the Chinese Academy of Sciences and the pilot special A. Advanced equipment-ocean heat flux meter. It is understood that this instrument is based on the measurement of turbulent speed and temperature changes to obtain the transportation of underwater heat.
Subsequently, the researchers used ocean heat flux meters to conduct scientific observations on the coast of Sanya and the northern South China Sea, and for the first time in the world, they obtained relevant data on underwater heat flux. Shang Xiaodong said that the global climate change is mainly regulated by the ocean, and some of these heats, such as the heat radiated by the sun to the earth, the heat absorbed and discharged by the earth, have disappeared, which is scientifically known as "heat loss." Phenomenon, so some people speculate that this small part of the heat may be stored inside the ocean. Therefore, the significance of studying underwater heat flux lies here.
The above-mentioned advanced observation sea-air flux technology will be expected to be applied to marine scientific research, mariculture and climate prediction and forecasting. In addition, the person in charge of the research team also said that in the future, a series of scientific research will continue to be carried out to further strengthen the observation performance of the ocean heat flux meter and apply it to the measurement of the heat flux of the seabed hydrothermal vent.