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Clear sky surface net long wave radiation integrated inversion method and system

A long-wave radiation and surface technology, applied in design optimization/simulation, geographic information database, structured data retrieval, etc., can solve problems such as incoming and large errors, and achieve the effect of improving inversion accuracy

Pending Publication Date: 2022-05-13
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0003] Generally, the net surface long-wave radiation in clear sky is calculated by component algorithm. The component algorithm commonly used at present is: first use satellite data to invert the surface down-going long-wave radiation and surface up-going long-wave radiation respectively, and then use the surface down-going long-wave radiation to subtract the surface up-going long-wave radiation The clear-sky surface net long-wave radiation is obtained, but there are certain uncertainties in the algorithm for inverting the surface down-going long-wave radiation and the ground-surface up-going long-wave radiation using satellite data. There are large errors in the inversion process

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  • Clear sky surface net long wave radiation integrated inversion method and system
  • Clear sky surface net long wave radiation integrated inversion method and system

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Embodiment 1

[0030] The clear-sky surface net long-wave radiation is calculated using a component algorithm. The component algorithm refers to inverting the surface down-going long-wave radiation and the ground-surface up-going long-wave radiation respectively, and then subtracting the ground-surface up-going long-wave radiation from the ground down-going long-wave radiation to obtain the clear-sky surface net long-wave radiation. At present, there are mainly three methods to invert and calculate the surface upgoing and downgoing long-wave radiation: (1) ground station measurement, although this method is currently considered to be the most accurate method to obtain the surface downgoing long-wave radiation and the surface upgoing long-wave radiation, but the ground observation The number of stations is extremely limited, not all stations have these two variables, and the ground observation stations are not evenly distributed around the world; (2) satellite inversion method, which is current...

Embodiment 2

[0087] This embodiment is used to provide an integrated inversion system for clear-sky surface net long-wave radiation, such as figure 2 As shown, the integrated inversion system includes:

[0088] The obtaining module M1 is used to obtain the MODIS long-time series data set and the surface long-wave radiation measured data set of each of the measured sites in a plurality of measured sites; the MODIS long-time series data set includes MODIS data at multiple moments; The measured surface long-wave radiation data set includes measured values ​​of surface net long-wave radiation at multiple times; the MODIS data and the measured value of surface net long-wave radiation have a one-to-one correspondence; the MODIS data includes multiple geographic locations and each Atmospheric top brightness, column water vapor content and clear sky identification parameters of MODIS bands 29, 31, and 32 corresponding to the above geographic locations;

[0089] The screening module M2 is used to...

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Abstract

The invention relates to a clear sky surface net long wave radiation integrated inversion method and system, and the method comprises the steps: firstly carrying out the processing of an MODIS long-time sequence data set and a surface long wave radiation measured data set of each actual measurement site in a plurality of actual measurement sites, so as to construct a total data set; and training the initial inversion model according to the data set to obtain an inversion model. And finally, taking the atmospheric top amplitude brightness and column water vapor content of the 29th, 31st and 32th wavebands of the MODIS at the position to be inverted as the input of an inversion model, and performing inversion to obtain clear sky surface net long wave radiation, thereby performing integrated inversion on the clear sky surface net long wave radiation. The method does not need to calculate clear sky surface net long-wave radiation after respectively inverting the surface upward long-wave radiation and the surface downward long-wave radiation, and can remarkably improve the inversion precision of the clear sky surface net long-wave radiation.

Description

technical field [0001] The invention relates to the technical field of clear-sky surface net long-wave radiation measurement, in particular to an integrated inversion method and system for clear-sky surface net long-wave radiation. Background technique [0002] Surface net longwave radiation is a key component of the surface radiation budget and a driver of climate change. The surface net long-wave radiation is the difference between the surface down-going long-wave radiation and the surface up-going long-wave radiation. The down-going long-wave radiation is dominated by the radiation emitted by the atmosphere near the surface, while the up-going long-wave radiation is mainly determined by the surface temperature. Surface net longwave radiation dominates nighttime net surface longwave radiation, and surface downgoing longwave radiation and surface upgoing longwave radiation are relevant parameters for assessing surface processes in climate, hydrological and agricultural mode...

Claims

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Application Information

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IPC IPC(8): G06F16/29G06F30/27G06N20/00
CPCG06F30/27G06F16/29G06N20/00Y02A90/10
Inventor 程洁曾琪
Owner BEIJING NORMAL UNIVERSITY
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