文献类型：期刊文献

英文题名：The Links between Canopy Solar-Induced Chlorophyll Fluorescence and Gross Primary Production Responses to Meteorological Factors in the Growing Season in Deciduous Broadleaf Forest

作者：Cheng, Xiangfen[1,2] Zhou, Yu[1,2] Hu, Meijun[1,2] Wang, Feng[3] Huang, Hui[1,2] Zhang, Jinsong[1,2]

第一作者：Cheng, Xiangfen

通信作者：Zhang, JS[1];Zhang, JS[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable Forestry South, Nanjing 210037, Peoples R China;[3]Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China

年份：2021

卷号：13

期号：12

外文期刊名：REMOTE SENSING

收录：;EI(收录号：20212710588771);WOS:【SCI-EXPANDED(收录号:WOS:000666630900001)】；

基金：This research was funded by the Fundamental Research Funds of the Central PublicWelfare Scientific Research Institutes (CAFYBB2020QD002-2) and National Nonprofit In-stitute Research Grant of the Chinese Academy of Forestry (CAFYBB2018ZA001).

语种：英文

外文关键词：SIF; GPP; growing season; meteorological factors

摘要：Solar-induced chlorophyll fluorescence (SIF) is a hopeful indicator, which along with remote sensing, is used to measure the photosynthetic efficiency and gross primary production (GPP) of vegetation in regional terrestrial ecosystems. Studies have found a significant linear correlation between SIF and GPP in a variety of ecosystems. However, this relationship has mainly been established using SIF and GPP data derived from satellite remote sensing and continuous ground-based observations, respectively, which are difficult to accurately match. To overcome this, some studies have begun to use tower-based automatic observation instruments to study the changes of near-surface SIF and GPP. This study conducts continuous simultaneous observation of SIF, carbon flux, and meteorological factors on the forest canopy of a cork oak plantation during the growing season to explore how meteorological factors impact on canopy SIF and its relationship with GPP. This research found that the canopy SIF has obvious diurnal and day-to-day variations during the growing season but overall is relatively stable. Furthermore, SIF is greatly affected by incident radiation in different weather conditions and can change daily. Meteorological factors have a major role in the relationship between SIF and GPP; overall, the relationship shows a significant linear regression on the 30 min scale, but weakens when aggregating to the diurnal scale. Photosynthetically active radiation (PAR) drives SIF on a daily basis and changes the relationship between SIF and GPP on a seasonal timescale. As PAR increases, the daily slopes of the linear regressions between SIF and GPP decrease. On the 30 min timescale, both SIF and GPP increase with PAR until it reaches 1250 mu mol center dot m(-2)center dot s(-1); subsequently, SIF continues to increase while GPP decreases and they show opposite trends. Soil moisture and vapor pressure deficit influence SIF and GPP, respectively. Our findings demonstrate that meteorological factors affect the relationship between SIF and GPP, thereby enhancing the understanding of the mechanistic link between chlorophyll fluorescence and photosynthesis.