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[Foliage clumping index of main vegetation types in Daxing'an Mountains, Northeast China]. / 大兴安岭地区主要植被类型的叶片聚集度系数.
Huang, Ting; Fan, Wen Yi; Mao, Xue Gang; Yu, Ying.
Afiliación
  • Huang T; College of Forestry, Northeast Forestry University, Harbin 150040, China.
  • Fan WY; College of Forestry, Northeast Forestry University, Harbin 150040, China.
  • Mao XG; College of Forestry, Northeast Forestry University, Harbin 150040, China.
  • Yu Y; College of Forestry, Northeast Forestry University, Harbin 150040, China.
Ying Yong Sheng Tai Xue Bao ; 28(3): 757-762, 2017 Mar 18.
Article en Zh | MEDLINE | ID: mdl-29741000
The foliage clumping index quantifies the cluster degree of the leaf spatial distribution under random canopy. It is of comparable importance for establishment of ecological models. MODIS BRDF model parameter products (MCD43A1 data) and land cover types (MCD12Q1 data) were used in this study to simulate the reflectivity of the hot spots and dark spots, and calculate the normalized difference between hotspot and darkspot (NDHD) based on the Ross-Li semi-empirical model. Least square method was then used to simulate the relationship between NDHD and the foliage clumping index and foliage clumping index products of 500-m resolution in August 2014 were retrieved. Measurements of the foliage clumping index in Daxing'an Mountains were conducted by using the TRAC (Tracing Radiation and Architecture of Canopies) sampling instrument for mo-del validation and analysis. Results showed that it was a feasible algorithm to retrieve clumping index from MCD43A1 product with the correlation of simulated data and the measured data of significance (R2=0.8879). The MODIS near infrared wave band was more sensitive than that on red band to foliage clumping index change. With the increase of the solar zenith angle, the clumping index retrieved by Ross-Li model had a linear increase (R2=0.9699), which indicated that the foliage clumping index related to the solar zenith angle.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Hojas de la Planta / Modelos Teóricos País/Región como asunto: Asia Idioma: Zh Revista: Ying Yong Sheng Tai Xue Bao Asunto de la revista: SAUDE AMBIENTAL Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: China
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Hojas de la Planta / Modelos Teóricos País/Región como asunto: Asia Idioma: Zh Revista: Ying Yong Sheng Tai Xue Bao Asunto de la revista: SAUDE AMBIENTAL Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: China