A measuring device and measuring method for measuring the change of reflectivity from generation to disappearance of white caps on the sea

Abstract

The invention relates to the field of ocean monitoring and provides a measurement device for measuring a reflectivity change from seaborne white crown generation to degradation and a measurement method thereof. The measurement device comprises a bracket and a seaborne white crown upstream radiance measurement device arranged on the bracket, wherein the bracket is further provided with a data acquisition device, a sunlight downstream radiation measurement device and a video data acquisition device; a spectrum value Lu of upstream radiation energy of whitecap in a process from seaborne white crown generation to degradation is obtained by the seaborne white crown upstream radiance measurement device; a sunlight downstream irradiance value Es is obtained by the sunlight downstream radiation measurement device; R is defined to be white crown reflectivity and the R is equal to Lu / Es. According to the measurement device and the measurement method thereof, the reflectivity change property from seaborne white crown generation to degradation can be simply and effectively obtained and the influences caused by skylight change can be eliminated; measured data can be collected by an automatic method and the data is convenient to count and process; the requirements on a platform on the device are simple and the measurement device can be used for complicated sea conditions.

Description

technical field [0001] The invention relates to the field of marine monitoring, in particular to a measuring device and a measuring method for the change in reflectance of white waves on the sea from generation, gradually changing to maximum, and then gradually decreasing until subsiding. Background technique [0002] The sea surface generates waves under the continuous action of the wind. The waves grow gradually, and the nonlinearity of the waves becomes stronger and stronger. When the wind speed reaches a certain critical value, the waves break and produce a large amount of water foam and water droplets at the wave crests. A large number of air bubbles are generated inside and on the surface. This white body of water, clearly visible on the wave surface, is known as the white cap and is the result of turbulent mixing of air and seawater. [0003] The ocean whitecap is closely related to the development of ocean remote sensing. In the process of ocean information extract...

AI Technical Summary

Problems solved by technology

[0004] The white cap changes with the waves in the flow, which makes it impossible to accurately align the measuring tool with the white cap to be measured; in addition, the energy value reflected by the white cap also depends on the change of the incident light intensity of the sun. In order to obtain the sea white cap generation To dissipate the reflectance change characteristics, it is necessary to measure the change of the incident light intensity of the sun synchronously

At present, there is no dedicated commercial instrument for fixed-point measurement of the reflectance change from the formation to the disappearance of the white crown on the sea. Even if some instruments are improved, the above problems cannot be perfectly solved.

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