Method for calculating water body stratification starting moment based on sea surface heat flux

Abstract

The invention relates to a method for calculating a water body stratification starting moment based on sea surface heat flux. The method comprises the following steps: carrying out data acquisition, i.e., acquiring atmosphere reanalysis data information about a wind field and reanalysis data information about heat flux; according to net heat flux data obtained in real time, after moving average, determining ocean heat absorption time t0; setting that a certain linear relationship exists between time [delta]t required between the starting moment of water stratification and the starting of heat absorption and the accumulated wind energy action, the accumulated net heat flux and the net heat flux growth rate, and establishing a regression model through a multivariate linear fitting method; selecting sample data of a certain number of grid points to perform regression analysis to obtain a regression equation, and performing standardization processing on the obtained linear regression equation; and by calculating the accumulated net heat flux and the net heat flux growth rate of each day, determining the [delta]t required between the water body stratification starting moment and the heat absorption starting moment, and calculating the water body stratification starting moment.

Description

technical field [0001] The invention relates to the field of marine science, in particular to a method for calculating the start time of water body stratification based on sea surface heat flux. Background technique [0002] The thermocline refers to the water layer with a large vertical temperature gradient. Usually, the upper layer is a mixed layer, and the temperature of the water body is relatively uniform. Below the layer, the temperature changes slowly. The formation of stratification is controlled and regulated by various physical mechanisms, and the formation of seasonal thermoclines in continental shelf seas is mainly affected by processes such as sea surface heat flux, sea surface wind stress and tide, topography, and advection. During the warming season, the sea surface absorbs the heat from the solar thermal radiation, causing changes in the density of the upper water body, while the mixing of bottom tides weakens this stratification, and the wind, through the ag...

AI Technical Summary

Problems solved by technology

However, when the latter item of the heat absorption rate of the water body indicates that stratification is forming soon, the heat exchange between the upper water body and the lower water body is hindered, the heat of the upper water body increases, and the temperature increases. As a result, the temperature difference between the atmosphere and the ocean becomes smaller, and the seawater heat absorption rate decreases.

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