Spatial-temporal consistency between gross primary productivity and solar-induced chlorophyll fluorescence of vegetation in China during 2007-2014
文献类型： 外文期刊
作者： Ma, Jun 1 ; Xiao, Xiangming 1 ; Zhang, Yao 2 ; Doughty, Russell 2 ; Chen, Bangqian 3 ; Zhao, Bin 1 ;
作者机构： 1.Fudan Univ, Shanghai Inst Ecochongming SIEC, Shanghai Chongming Dongtan Wetland Ecosyst Res St, Minist Educ,Key Lab Biodivers Sci & Ecol Engn, Shanghai 200433, Peoples R China
2.Univ Oklahoma, Ctr Spatial Anal, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
3.CATAS, Rubber Res Inst, Minist Agr, Danzhou Invest & Expt Stn Trop Cops, Danzhou 571737, Peoples R China
关键词： Gross primary production; Light use efficiency; Vegetation photosynthesis model; GOME-2 SIF data; Climate change
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）
ISSN： 0048-9697
年卷期： 2018 年 639 卷
页码：
收录情况： SCI
摘要： Accurately estimating spatial-temporal patterns of gross primary production (GPP) is important for the global carbon cycle. Satellite-based light use efficiency (LUE) models are regarded as an efficient tool in simulating spatial-temporal dynamics of GPP. However, the accuracy assessment of GPP simulations from LUE models at both spatial and temporal scales remains a challenge. In this study, we simulated GPP of vegetation in China during 2007-2014 using a LUE model (Vegetation Photosynthesis Model, VPM) based on MODIS (moderate-resolution imaging spectroradiometer) images with 8-day temporal and 500-m spatial resolutions and NCEP (National Center for Environmental Prediction) climate data. Global Ozone Monitoring Instrument 2 (GOME-2) solar-induced chlorophyll fluorescence (SIF) data were used to compare with VPM simulated GPP (GPP(VPM)) temporally and spatially using linear correlation analysis. Significant positive linear correlations exist between monthly GPP(VPM) and SIF data over a single year (2010) and multiple years (2007-2014) inmost areas of China. GPP(VPM) is also significantly positive correlated with GOME-2 SIF (R-2 > 0.43) spatially for seasonal scales. However, poor consistency was detected between GPP(VPM) and SIF data at yearly scale. GPP dynamic trends have high spatial-temporal variation in China during 2007-2014. Temperature, leaf area index (LAI), and precipitation are the most important factors influence GPP(VPM) in the regions of East Qinghai-Tibet Plateau, Loss Plateau, and Southwestern China, respectively. The results of this study indicate that GPP(VPM) is temporally and spatially in line with GOME-2 SIF data, and space-borne SIF data have great potential for evaluating LUE-based GPP models. (C) 2018 Elsevier B.V. All rights reserved.
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