热带森林碳通量研究综述

Review on Tropical Carbon Flux Research

综述了热带森林碳通量的研究结果,指出随着电子测量和存储技术的发展,微气象涡度相关法已应用于森林碳通量的测量和研究;热带森林是碳源还是碳汇仍是一个存在争议的问题,热带森林的利用方式以及森林火灾在很大程度上决定了热带森林是碳源还是碳汇。夜间通量测量的不准确性,水平平流以及垂直平流都会在一定程度上影响碳通量测量的准确性,因此只有尽量减小测量误差,提高数据分析及处理技术,才能更准确地了解热带森林的作用。

The carbon budget of terrestrial ecosystem plays an important role in the global change,especially the forests as the principal part.Tropical forests have a lot of species and large biomass.It's one of important factors that control the global carbon balance.Tropical rain forests cover 12% of the plant's land surface, and they contain 40% of carbon in terrestrial biosphere.They become one of main factors to control the global carbon balance.So,small change of this ecosystem may bring significant changes of the global carbon cycle.Recent years,some ecologists used eddy covariance to study carbon flux in tropical forests.Now,it's a disputed question whether the tropical forest is a carbon source or a carbon sink.To a great degree,using fashion of tropical forest and forest fire are important factors that can decide the role of tropical forest.Many factors influence the accuracy of flux measurement,such as inaccurate flux measurement in the nighttime,horizontal and vertical flow.If we can decrease the measurement error in the most and improve our data analysis technology,we'll know the role of tropical forest more accurate.It is a fact that the flux towers are very limited,for the whole tropical forests we can find out their important role through the calculated model.This paper presented some results of tropical forest researches.It's good both for CO_2 flux measurement and tropical forest research in our country.