ChinaSpec: A Network for Long‐Term Ground‐Based Measurements of Solar‐Induced Fluorescence in China,Journal of Geophysical Research: Biogeosciences

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ChinaSpec: A Network for Long‐Term Ground‐Based Measurements of Solar‐Induced Fluorescence in China
Journal of Geophysical Research: Biogeosciences ( IF 3.7 ) Pub Date : 2021-01-29 , DOI: 10.1029/2020jg006042
Yongguang Zhang _{1,

2,

3} , Qian Zhang _{1,

2} , Liangyun Liu ₄ , Yangjian Zhang ₅ , Shaoqiang Wang ₅ , Weimin Ju _{1,

2} , Guangsheng Zhou ₆ , Li Zhou ₆ , Jianwu Tang ₇ , Xudong Zhu ₈ , Feng Wang ₉ , Ying Huang ₇ , Zhaoying Zhang _{1,

2} , Bo Qiu _{1,

2} , Xiaokang Zhang _{1,

2} , Songhan Wang _{1,

2} , Changping Huang ₄ , Xuguang Tang ₁₀ , Jinsong Zhang ₁₁

Affiliation

International Institute for Earth System Sciences Nanjing University Nanjing Jiangsu210023 China
Jiangsu Provincial Key Laboratory of Geographic Information Technology Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources School of Geography and Ocean Science Nanjing University Nanjing Jiangsu210023 China
Huangshan Park Ecosystem Observation and Research Station Ministry of Education China
Aerospace Information Research Institute Chinese Academy of Sciences Beijing100094 China
Key Lab of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China
State Key Laboratory of Severe Weather Chinese Academy of Meteorological Science Beijing100081 China
State Key Laboratory of Estuarine and Coastal Research Institute of Eco‐Chongming East China Normal University Shanghai200241 China
Key Laboratory of the Coastal and Wetland Ecosystems (Ministry of Education) College of the Environment and Ecology Xiamen University Xiamen Fujian361102 China
Institute of Desertification Studies Chinese Academy of Forestry Beijing100091 China
Chongqing Engineering Research Center for Remote Sensing Big Data Application School of Geographical Sciences Southwest University Chongqing400715 China
Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry Chinese Academy of Forestry Beijing100091 China

Remotely sensed solar‐induced fluorescence (SIF) has emerged as a novel and powerful approach for terrestrial vegetation monitoring. Continuous measurements of SIF in synergy with concurrent eddy covariance (EC) flux measurements can provide a new opportunity to advance terrestrial ecosystem science. Here, we introduce a network of ground‐based continuous SIF observations at flux tower sites across the mainland China referred to as ChinaSpec. The network consists of 16 tower sites until 2019 including six cropland sites, four grassland sites, four forest sites, and two wetland sites. An automated SIF system was deployed at each of these sites to collect continuous high‐resolution spectra for high‐frequency SIF retrievals in synergy with EC flux measurements. The goal of ChinaSpec is to provide long‐term ground‐based SIF measurements and promote the collaborations between optical remote sensing and EC flux observation communities in China. We present here the details of instrument specifications, data collection and processing procedures, data sharing and utilization protocols, and future plans. Furthermore, we show the examples how ground‐based SIF observations can be used to track vegetation photosynthesis from diurnal to seasonal scales, and to assist in the validation of fluorescence models and satellite SIF products (e.g., from OCO‐2 and TROPOMI) with the measurements from these sites since 2016. This network of SIF observations could improve our understanding of the controls on the biosphere‐atmosphere carbon exchange and enable the improvement of carbon flux predictions. It will also help integrate ground‐based SIF measurements with EC flux networks which will advance ecosystem and carbon cycle researches globally.

更新日期：2021-03-27

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