A method for monitoring under-forest temperature based on remote sensing technology

Abstract

The invention discloses an under-forest temperature monitoring method fused with a remote sensing technology. The method comprises the following steps of (1) dividing a forest ground surface into a canopy, an under-forest air layer and a soil surface layer, (2) constructing a soil surface layer energy balance model, (3) constructing a canopy energy balance model, (4) constructing a forest ground surface energy balance model by using the soil surface layer energy balance model and the canopy energy balance model, and (5) quickly acquiring related parameters by utilizing the remote sensing technology through the forest ground surface energy balance model to achieve quick and large-area monitoring of the temperature under a forest. According to the method, a traditional one-layer ground surface energy balance model is improved into the forest ground surface energy balance model with the canopy layer, the under-forest air layer and the soil layer, and the method has the advantage that theunder-forest air temperature of the forest can be accurately and rapidly obtained in a large area after the remote sensing technology is fused.

Description

technical field [0001] The invention relates to the technical field of obtaining the understory temperature of a forest, in particular to a rapid monitoring method for understory temperature integrated with remote sensing technology. Background technique [0002] The problem of global change marked by climate warming is becoming more and more serious, threatening the sustainable development of human society, and has attracted great attention from governments and the scientific community. As the main surface type of terrestrial ecosystems (accounting for about 31%), forests can change local temperature through transpiration, heat conduction, shading, etc., and play an important role in mitigating global warming. At present, the effects of biophysical processes in forest ecosystems on regional climate are mainly determined by the understory temperature T af and outside air temperature T ao The difference ΔT a Embodied (ΔT a =T af -T ao ). When ΔT a When it is a negativ...

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Problems solved by technology

However, due to the limitation of the penetration ability of remote sensing technology, the temperature obtained based on remote sensing technology research is the near-surface temperature T s , that is to say, if it is a forest area, the temperature of the forest canopy will be obtained instead of the air temperature under the forest, so it cannot be unified with the conclusion of the station-based research

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