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Princípios do modelo analítico tridimensional de transporte radiativo ESRT e sua aplicação na simulação do espectro do dossel de florestas heterogêneas

  • role： First author第一作者
  • Affiliation：

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

    Key Laboratory of Forestry Remote Sensing and Information System, National Forestry and Grassland Administration, Beijing 100091, China

  • Email：xiaoyaoli@ifrit.ac.cn
  • Introduction：李骁尧，研究方向为林业遥感机理建模与应用。E-mail： xiaoyaoli@ifrit.ac.cn
LI Xiaoyao12,  
  • Affiliation：

    Northwest Surveying and Planning Institute of National Forestry and Grassland Administration, Xi'an 710048, China

    Key Laboratory of National Forestry and Grassland Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, National Forestry and Grassland Administration, Xi'an 710048, China

RAO Yueming34,  
  • Affiliation：

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

ZHANG Zhuoli1,  
  • Affiliation：

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

WEI Shengrong1,  
  • Affiliation：

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

QIN Pengyao1,  
  • role： Corresponding author通信作者
  • Affiliation：

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

    Key Laboratory of Forestry Remote Sensing and Information System, National Forestry and Grassland Administration, Beijing 100091, China

  • Email：tan@caf.ac.cn
  • Introduction：谭炳香，研究方向为森林资源遥感监测、森林信息遥感提取。E-mail： tan@caf.ac.cn
TAN Bingxiang12*,  
  • Affiliation：

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

FU Liyong1

Resumo

A complexa heterogeneidade espacial em cenas florestais afeta as características de reflexão do dossel, e como lidar com a heterogeneidade é um desafio na área de modelagem de transporte radiativo. Para superar as limitações de precisão dos modelos analíticos clássicos devido à simplificação das cenas, bem como as limitações de eficiência operacional dos modelos de simulação computacional em grandes cenas, desenvolvemos o modelo analítico tridimensional de transporte radiativo ESRT com base na teoria do transporte radiativo estocástico. Porém, a aplicação do modelo ESRT em diferentes cenários florestais complexos ainda precisa ser explorada e requer mais dados de medições de campo para validação e avaliação do modelo. Este artigo apresenta os princípios básicos do modelo ESRT e seus parâmetros de entrada e saída, e com base em dados de 21 parcelas de florestas mistas e 50 parcelas estressadas por pragas, explora a capacidade do modelo em simular os espectros do dossel de diferentes tipos de florestas heterogêneas, analisando o impacto do grau de mistura e do estresse por pragas nos espectros do dossel. Os resultados mostram que, em comparação com o modelo SRT original, o modelo ESRT ampliado apresenta melhor consistência entre os espectros do dossel simulados e os medidos nos locais de florestas mistas e afetadas por pragas, com precisão de simulação mais próxima dos modelos computacionais tridimensionais; a proporção de coníferas para folhas largas e a distribuição vertical das folhas danificadas afetam o sinal espectral do dossel. O modelo ESRT fornece uma estrutura para simulação de transporte radiativo para múltiplos cenários de florestas heterogêneas, equilibrando a precisão da simulação tridimensional com a eficiência dos modelos analíticos clássicos, sendo mais adequado para simulação em larga escala de povoamentos florestais complexos. O estudo pode fornecer uma base teórica para aplicações de monitoramento de cenários florestais complexos utilizando o modelo ESRT.

Palavras-chave

sensoriamento remoto;transporte radiativo;modelo analítico tridimensional;dossel florestal heterogêneo;florestas mistas;pragas e doenças florestais

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