Chinese scientists have proposed the "marine pastoral grass" spring growth peak prediction mechanism

Chinese scientists have proposed the "marine pastoral grass" spring growth peak prediction mechanism

Xinhua News Agency, Shanghai, June 28 (Reporter Dong Xue) Floating plants are known as "marine pasture". The growth of float plants in the ocean determines how much fishing objects. Recently, Liu Dongyan's research team at the National Key Laboratory of Hekou Coast Studies at East China Normal University found that marine fronts, turbulent capacity and atmosphere forced to jointly affect the outbreak time and scale of the peak of spring growth in the spring, and thus propose a prediction mechanism.

"Specifically, the earlier and longer the marine fronts are relaxed, the lower the duration, the lower the turbulence energy, the more conducive to creating suitable light and nutritional salt environment, and promoting the rapid growth of floating plants." Liu Dongyan introduced that the team analyzed the Yellow Sea 2003 in 2003 By the 2020 satellite remote sensing data and three marine frontal observation data, the relationship between the peak of spring growth of floating plants in the spring growth peak and marine front and turbulent energy.

Ocean fronts refer to the narrow interface formed by the water group of different properties, such as the encounter between the high saline group and the low saline group. According to Liu Dongyan, influenced by the invasion of the warm flow of the Yellow Sea, the front coast of the Shandong Peninsula is generally formed from November each year. The front strength of the front has continued to increase with the cold weather in winter, as if a vertical "water wall" was formed. In the spring, the warmth of the Yellow Sea weakened, and the front surface gradually relaxed, and the "water wall" began to tilt to accelerate the delivery of near -shore nutritional salt to the sea.

At the same time, turbulence can gradually decrease in spring, which means that the stability of water bodies increases. "my country's near -shore river is carried into sediment into the sea. The higher turbulence can increase the turbidity of the water body by mixed effects, resulting in weakening the light in the water body." Liu Dongyan said, "On the contrary, when the turbulent energy is zero, the mixed effect is mixed. Reline, high water stability, upper floating plants can get more light for photosynthesis. "

The research results have been published in the international academic journal "Water Research". This mechanism has important reference value for the use of marine ecological dynamic model simulation and predicting floating plant spring growth characteristics.

【Edit: Ye Pan】

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