Eddy flux observation energy imbalance correction method, device and electronic equipment

Abstract

The invention provides an eddy flux observation energy imbalance correction method and device, and an electronic device and relates to the meteorological monitoring technology field. By using the method, during energy imbalance correction, the flux data of a preset time scale is converted into daily-scale flux data; a Bowen ratio is used to correct the daily-scale flux data; and then, the corrected flux data of the preset time scale is obtained through the corrected daily scale data. Because a daily-scale soil heat flux is usually zero, the soil heat flux is prevented from participating in correction calculation, and a uncertainty problem generated because time or spaces between the fluxes are mismatched when energy imbalance correction is performed through directly using a Bowen ratio method in the prior art is effectively alleviated; and the effective correction of the energy imbalance phenomenon of the eddy observation flux is realized, which is beneficial to obtaining the flux dataaccording with a reality.

Description

technical field [0001] The invention relates to the technical field of meteorological monitoring, in particular to a method, device and electronic equipment for correcting energy imbalance in eddy flux observation. Background technique [0002] The eddy correlation method (abbreviated as EC) is one of the flux observation methods widely used at present. Many long-term flux observation research sites including ChinaFlux use the eddy correlation flux observation system to conduct near-surface Water, heat, and CO in the process of earth-air exchange 2 Isoflux observations. The ground-air exchange process is based on the principle of energy balance, that is, the sum of latent heat flux and sensible heat flux is equal to the surface available energy (the difference between surface net radiation and soil heat flux). [0003] However, there is a serious energy imbalance problem in the flux data observed by the eddy correlation system, that is, the sum of latent heat flux and sens...

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Problems solved by technology

[0004] However, the soil heat flux in the energy available on the surface is usually measured by the soil heat flux plate, which only represents the point-scale spatial area, while the net radiation flux, latent heat flux and sensible heat flux are based on the surface-scale area Therefore, there is a serious spatial mismatch between the soil heat flux and other fluxes

Moreover, due to the difficulty in measuring soil heat flux and the lack of measurement data, it is often difficult to obtain soil heat flux data that match the flux data to be corrected in time and space. Serious uncertainty in balance correction

[0005] Therefore, when directly using the Bowen ratio method for energy imbalance correction, due to the time or space mismatch between the fluxes, there is a serious uncertainty in the energy imbalance correction, which is not conducive to obtaining accurate flux data.

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