文献类型：期刊文献

英文题名：Solar-induced chlorophyll fluorescence intensity has a significant correlation with negative air ion release in forest canopy

作者：Shi, Guang-Yao[1,2] Huang, Hui[1,2] Sang, Yu-Qiang[3] Cai, Lu-Lu[3,4] Zhang, Jin-Song[1,2] Cheng, Xiang-Fen[1,2] Meng, Ping[1,2] Sun, Shou-Jia[1,2] Li, Jian-Xia[5] Qiao, Yong-Sheng[5]

第一作者：Shi, Guang-Yao

通信作者：Zhang, JS[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, State Forestry Adm, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China;[3]Henan Agr Univ, Coll Forest, Zhengzhou 450002, Henan, Peoples R China;[4]Henan Geophys Space Informat Res Inst, Zhengzhou 450016, Henan, Peoples R China;[5]Nanshan Natl Forest Farm, Shaoyang 459000, Henan, Peoples R China

年份：2022

卷号：269

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：;EI(收录号：20214811252484);Scopus(收录号：2-s2.0-85120045206);WOS:【SCI-EXPANDED(收录号:WOS:000783208200003)】；

基金：Acknowledgments This study was funded by Fundamental Scientific Research Opera-tion of Central-level Public Welfare Scientific Research Institutes (CAFYBB2018ZA002, CAFYBB2018ZA001) . We thank for Dr Rachelle critically editing and improving the manuscript.

语种：英文

外文关键词：NAI; SIF; Photosynthetically active radiation; Forest canopy

摘要：Forest vegetation is an essential source of negative air ion (NAI) and influencing factor of the process. A number of studies have focused on the temporal and spatial changes of NAI in different forest communities and their relationship with meteorological factors; however, there is no literature on the relationship between solar induced chlorophyll fluorescence intensity (SIF) and NAI, and quantitative research on relationship between NAI and photosynthesis of forest vegetation is comparatively limited. In this study, we investigated the dynamic changes NAI, SIF, and meteorological parameters in canopy during the growing season by using a flux tower at the sites Xiaolangdi and Minquan in a warm-temperate monsoon climate zone from June to September of 2019 and 2020. Results showed that the canopy NAI, SIF, and photosynthetically active radiation (PAR) showed significant diurnal and seasonal dynamic change characteristics, and that the changes in the observed indicators at different times were significantly different. The seasonal change characteristics of canopy NAI and SIF were relatively similar, and canopy SIF could accurately capture the dynamic changes of NAI. Additionally, the NAI-SIF relationship was increasingly significant at higher PAR levels, and the coefficient of determination (R-2) of the two sites reached 0.652 and 0.570. It showed that when vegetation photosynthesis was fully activated, the dynamic change process of the canopy NAI provided a more robust correlation and more accurate estimation in the vegetation's main growth stage, thus demonstrating the reliability of SIF as an indicator for tracking NAI seasonal changes. In the future, automatic, continuous SIF observations could provide reliable understanding of the photosynthetic characteristics of terrestrial ecosystems, thereby quantifying the contribution potential of forest to NAI application in ground-based optical measurement and airborne and satellite remote sensing. This provides a working foundation for direct assessment of spatial and temporal distribution patterns of global seasonal NAI.