Photoperiod Explains the Asynchronization Between Vegetation Carbon Phenology and Vegetation Greenness Phenology
文献类型：期刊论文
| 作者 | Kong, Dongdong1; Zhang, Yongqiang2; Wang, Dagang3; Chen, Jianyao3; Gu, Xihui1 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 125期号:8页码:15 |
| 关键词 | vegetation greenness phenology vegetation carbon phenology asynchronization photoperiod |
| ISSN号 | 2169-8953 |
| DOI | 10.1029/2020JG005636 |
| 通讯作者 | Zhang, Yongqiang(yongqiang.zhang2014@gmail.com) ; Gu, Xihui(guxh@cug.edu.cn) |
| 英文摘要 | Vegetation carbon phenology is a key indicator of vegetation actual photosynthesis activity and regulates terrestrial ecosystem carbon balance. A comprehensive understanding of the structural difference of carbon phenology and greenness phenology is still lacking. This study evaluated the structural difference of vegetation greenness phenology and carbon phenology on 95 eddy covariance flux sites (637 site-years). Vegetation greenness phenology is extracted from remote sensing vegetation indices (i.e., enhanced vegetation index [EVI] and normalized difference vegetation index [NDVI]) of Moderate Resolution Imaging Spectroradiometer satellites; carbon phenology is extracted from daily gross primary production estimates at flux sites. We found that there exists remarkable asynchronization between vegetation greenness phenology and carbon phenology on the 95 flux sites. Generally, the asynchronization is more prevalent in the withering season, with the bias about 18.7 13.0 days for EVI and about 29.8 14.4 days for NDVI. In comparison, in the green-up season, the bias is only about -1.6 12.9 days for EVI and -6.0 13.8 days for NDVI. We found that photoperiod is the dominant factor controlling the asynchronization and the decrease of photosynthetic capacity in the withering season, other than photosynthetically active radiation or temperature. Our study also reveals that EVI x PC and NDVI x PC are good proxies of vegetation carbon phenology, where PC is the photoperiod constraint and is quantified as dayl/daylmax2. Using PC in the withering season reduces the bias of EVI from 18.7 +/- 13.0 days to -2.4 +/- 11.2 days and the bias of NDVI from 29.8 +/- 14.4 days to -1.1 +/- 12.7 days. Key Points There exists strong asynchronization between vegetation greenness phenology and carbon phenology in the withering season Photoperiod explains the asynchronization between vegetation greenness phenology and carbon phenology in the withering season EVI x PC and NDVI x PC are good proxies of vegetation carbon phenology |
| WOS关键词 | LAND-SURFACE PHENOLOGY ; GROWING-SEASON LENGTH ; TIME-SERIES ; INTERANNUAL VARIABILITY ; PHOTOSYNTHETIC CAPACITY ; PLANT PHENOLOGY ; CLIMATE-CHANGE ; INDEX ; PRODUCTIVITY ; DYNAMICS |
| 资助项目 | Pioneer Talents Program of Chinese Academy of Sciences ; National Key Research and Development Program of China[2018YFA0605603] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000612324000008 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | Pioneer Talents Program of Chinese Academy of Sciences ; National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/136310]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Yongqiang; Gu, Xihui |
| 作者单位 | 1.China Univ Geosci, Sch Environm Studies, Dept Atmospher Sci, Wuhan, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 3.Sun Yan Sen Univ, Sch Geog & Planning, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kong, Dongdong,Zhang, Yongqiang,Wang, Dagang,et al. Photoperiod Explains the Asynchronization Between Vegetation Carbon Phenology and Vegetation Greenness Phenology[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2020,125(8):15. |
| APA | Kong, Dongdong,Zhang, Yongqiang,Wang, Dagang,Chen, Jianyao,&Gu, Xihui.(2020).Photoperiod Explains the Asynchronization Between Vegetation Carbon Phenology and Vegetation Greenness Phenology.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(8),15. |
| MLA | Kong, Dongdong,et al."Photoperiod Explains the Asynchronization Between Vegetation Carbon Phenology and Vegetation Greenness Phenology".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.8(2020):15. |
入库方式： OAI收割
来源：地理科学与资源研究所
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