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Method for inversing air temperature of surface layer based on thermal infrared remote sensing

A thermal infrared remote sensing and remote sensing inversion technology, which is applied in the field of near-surface temperature inversion based on thermal infrared remote sensing, can solve problems such as inapplicability in water bodies, cities, deserts and other areas, and the lack of more in-depth research on the surface energy balance process, etc. Improved inversion accuracy, significant pertinence, and strong practicability

Inactive Publication Date: 2011-01-05
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

At present, the most commonly used remote sensing inversion method for near-surface air temperature is the temperature-vegetation index method (TVX method). This method is simple and easy to implement, but it is only suitable for areas with high vegetation coverage. Applicable, thus limiting its application to a large extent
However, in the research of using the relationship between surface temperature and near-surface air temperature to estimate near-surface air temperature, most scholars only consider the influence of surface temperature and vegetation index on the near-surface air temperature, without further research on the surface energy balance. process

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  • Method for inversing air temperature of surface layer based on thermal infrared remote sensing
  • Method for inversing air temperature of surface layer based on thermal infrared remote sensing
  • Method for inversing air temperature of surface layer based on thermal infrared remote sensing

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Embodiment Construction

[0026] Combine below Figure 5 The present invention is further described in detail:

[0027] 1) Establish the basic form of the near-surface air temperature remote sensing inversion model

[0028] On the basis of considering the energy balance process of the surface, multiple surface and climate factors such as surface temperature, vegetation index NDVI, surface albedo, solar radiation, solar zenith angle, solar azimuth, and altitude were selected as independent variables, and established Basic form of remote sensing inversion model for near-surface air temperature

[0029]

[0030] In the formula, T a is the near-surface temperature, T s is the surface temperature, NDVI is the normalized difference vegetation index, AL is the surface albedo, θ and φ are the solar zenith angle and azimuth angle (in radians), respectively, where the azimuth angle is calculated from the south direction (west is positive, Eastward is negative), DSSF is the daily astronomical radiation (in...

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Abstract

The invention discloses a method for inversing the air temperature of a surface layer based on thermal infrared remote sensing. The method comprises the following steps of: (1) determining a fundamental form of a surface layer air temperature remote sensing inversion model; (2) establishing the surface layer air temperature remote sensing inversion model; (3) basing on different surface types of air temperature remote sensing inversion models; and (4) analyzing by using the scale effect of the remote sensing inversion model to obtain an optimal air temperature remote sensing inversion model. A spatial distribution graph of the near-surface layer air temperature can be quickly and accurately calculated by the method. Because the model is established by a regression analysis method in consideration of a surface energy balance process, the method has the advantages of both a theoretical model and a statistical model, high accuracy and high practicability.

Description

technical field [0001] The invention relates to a method for retrieving near-surface air temperature, in particular to a method for retrieving near-surface air temperature based on thermal infrared remote sensing. Background technique [0002] Near-surface air temperature, usually referring to the atmospheric temperature observed at 2m or 1.5m above the ground, is one of the most important observation indicators of meteorological stations. Near-surface temperature is closely related to people's lives, and its temporal and spatial changes have important reference value for the study of major environments such as global warming and urban heat islands. In addition, the near-surface air temperature is an important factor affecting the water and energy exchange between the surface and the atmosphere, and it controls the water and energy exchange between the surface and the atmosphere. Effective understanding of ecology, hydrology, climate, agriculture, and terrestrial biological...

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Application Information

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IPC IPC(8): G01J5/00
Inventor 徐永明
Owner NANJING UNIV OF INFORMATION SCI & TECH
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