RELATIONSHIP BETWEEN WOODY BIOMASS AND PAR CONVERSION EFFICIENCY FOR ESTIMATING NET PRIMARY PRODUCTION FROM NDVI

被引：98

作者：

HUNT, ER

机构：

[1] School of Forestry, University of Montana, Missoula, MT

来源：

INTERNATIONAL JOURNAL OF REMOTE SENSING | 1994年 / 15卷 / 08期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

D O I：

10.1080/01431169408954203

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

Terrestrial net primary production (NPP) may be determined from remotely-sensed vegetation indices by estimating the amount of photosynthetically active radiation (PAR) absorbed by vegetation. Studies from the literature were used to determine the upper limit of the PAR conversion efficiency (epsilon) as a function of woody biomass for forest vegetation. Without climatic or other limitations, the upper limit was about 3.5 g MJ-1 of absorbed PAR at very low values of stem biomass. Because of increased maintenance respiration with increasing woody biomass, the upper limit decreased to 2.0 g MJ-1. Therefore, global estimates of NPP based on vegetation indices should include a classification among established forest, young forest and non-forest ecosystems to account for differences in epsilon.

引用

页码：1725 / 1730

页数：6

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