日光诱导叶绿素荧光估算中国典型生态系统总初级生产力的能力  

Ability of Sun-induced Chlorophyll Fluorescence on Estimating Terrestrial Ecosystem Gross Primary Productivity in China

作　　者：刘青瑞[1,2] 居为民[1,3] 张永光[1] 张雷明[4] 王绍强[4] 周艳莲[2,3] 赵风华[4] 闫俊华[5] 韩士杰[6] 郝彦宾[7] 陈世苹[8] 李英年[9] 项文化 

机构地区：[1]南京大学国际地球系统科学研究所,江苏南京210023 [2]南京大学地理与海洋科学学院,江苏南京210023 [3]江苏省地理信息技术重点实验室,江苏南京210023 [4]中国科学院地理科学与资源研究所,北京100101 [5]中国科学院华南植物园,广东广州510650 [6]中国科学院沈阳应用生态研究所,辽宁沈阳110000 [7]中国科学院大学,北京100049 [8]中国科学院植物研究所,北京100093 [9]中国科学院西北高原生物研究所,青海西宁810008 [10]湖南会同杉木林生态系统国家野外科学观测研究站,湖南会同438107

出　　处：《遥感技术与应用》2017年第2期363-373,共11页Remote Sensing Technology and Application

基　　金：中国科学院战略性先导科技专项(XDA05050602-1和XDA05050208);国家自然科学基金面上项目(41371070)

摘　　要：陆地生态系统总初级生产力(GPP,Gross Primary Productivity)是陆地生态系统碳循环的重要分量,提高其估算精度具有重要的科学意义。由于受多种因子的影响,GPP的时空变异明显,其估算结果存在较大的不确定性。日光诱导叶绿素荧光(SIF,Sun-Induced Chlorophyll Fluorescence)与GPP密切相关,近年来被应用于估算区域和全球GPP,但其在中国生态系统的适用性尚不清楚。以中国8个典型植被生态系统为研究对象,驱动两叶光能利用率模型(TL-LUE,TwoLeaf Light Use Efficiency Model)模拟以站点为中心0.5°×0.5°区域内的月GPP,验证SIF估算GPP的能力。结果表明,SIF具有监测中国典型植被生态系统GPP的能力,月SIF与TL-LUE模拟的月GPP之间显著相关,其中5个生态系统中两者的R2高于0.8,最高达到0.91,GPP与SIF变化的斜率随生态系统类型变化。模拟的GPP与SIF遥感数据的季节变化特征相同,两者之间的一致性在生长季节好于非生长季节;SIF能更好地监测农田GPP的季节变化。Accurate estimation of terrestrial ecosystem Gross Primary Productivity（GPP）is of significance as it is a key component of terrestrial ecosystem carbon cycle.There were great uncertainties for GPP estimation as it was influenced by many factors and varied greatly at space and temporal scales.In recent years,Sun-Induced Chlorophyll Fluorescence（SIF）has been applied to estimate regional and global GPP.However,relationships between SIF and GPP in China were not clear.In this study,8typical ecosystems in China were selected,the Two-Leaf Light Use Efficiency model（TL-LUE）was used to simulate national GPP.Results showed that SIF has the ability of monitoring GPP in typical ecosystems in China.There were significant correlation between SIF and modeled GPP by using TL-LUE model.R2 between SIF and GPPwas higher than 0.8in 5ecosystems,and the highest R^2 was 0.91.The slope between SIF and GPP changed among different ecosystem types.There were similar seasonal variations between GPP and SIF,and consistency between GPP and SIF during growing season was better than that during non-growing season.SIF has the best ability on monitoring GPP seasonal variations on cropland.

关 键 词：陆地生态系统总初级生产力 日光诱导叶绿素荧光(SIF) 两叶光能利用率模型(TL-LUE) 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]