Seasonal variations of canopy spectra and their indications to carbon fluxes in a temperate forest in northeast China
文献类型:期刊论文
作者 | Jiang, Jie5; Yu, Quanzhou4,5; Liu, Yujie3; Liang, Tianquan4,5; Tang, Qingxin4,5; Zhou, Lei2; Zhang, Hongli5; Zhang, Baohua5; Wang, Shaoqiang1 |
刊名 | JOURNAL OF APPLIED REMOTE SENSING |
出版日期 | 2022-10-01 |
卷号 | 16期号:4页码:17 |
关键词 | Hyperion spectral analysis carbon flux Changbai Mountain forest canopy different seasons spectral indexes |
DOI | 10.1117/1.JRS.16.048503 |
通讯作者 | Yu, Quanzhou(yuquanzhou2008@126.com) |
英文摘要 | The seasonal variations of forest canopy spectral characteristics are critical to improving the utilization of remote sensing methodology to quantify forest physiology, especially forest carbon sink. However, the seasonal variations of forest canopy spectra are poorly understood. Combined field survey and EO-1 Hyperion imageries, we extracted the spectral curves of seven forest types of Changbai Mountain in China in seven periods. We also calculated various remote sensing indexes and analyzed their seasonal change of spectral characteristics among different forest types. Optimal indexes were selected to indicate the seasonal variation of forest carbon fluxes. Our results showed that there were differences in spectral curves among forest types. The reflectance of coniferous forests was lower than that of broad-leaved forests in growing season. Changbai Scotch pine forest owned the lowest spectral reflectance, whereas the reflectance of Mongolian oak forest was the highest, especially in the near-infrared region. The red edge slope (RES) of broad-leaved forest was higher than coniferous forest in spring and summer. The RES of broad-leaved and coniferous forests was similar in autumn. The red edge position of various forest types showed slight shift in different seasons. Four typical forest types showed different spectral characteristics with seasonal changes. The seasonal variation of coniferous forest spectral curves was not obvious. The seasonal variation of broad-leaved forest spectra was the largest. Most of the spectral indexes can indicate the seasonal variation characteristics of each forest type. Enhanced vegetation index (EVI) is better than normalized difference vegetation index (NDVI) to indicate the forest phenology. Seasonal curves of spectral indexes were different in all forest types. Spectral indexes of coniferous forests were most stable throughout the year. The curves of each index in broad-leaved forests showed significant difference in autumn, which may be influenced by the understory vegetation after their defoliation. For broad-leaved Korean (BK) pine forest, the scaled value of photochemical reflectance index (SPRI)*EVI owned the highest correlation with gross primary productivity (R = 0.99 and P < 0.01) and net ecosystem exchange (R = -0.77 and P < 0.05), respectively. SPRI*NDVI showed the highest correlation with ecosystem respiration (R = 0.96 and P < 0.01). The seasonal variation of carbon fluxes of different forest types retrieved from the optimal remote sensing index were consistent, but their peaks occurred at different times. (c) 2022 Society of Photo-Optical Instrumentation Engineers (SPIE) |
WOS关键词 | LEAF CHLOROPHYLL CONTENT ; NET ECOSYSTEM EXCHANGE ; DIOXIDE EXCHANGE ; VEGETATION ; RED ; ASSIMILATION ; RESPIRATION ; SEPARATION ; HYPERION |
资助项目 | National Natural Science Foundation of China[31800367] ; Science and Technology Service Network Initiative, CAS[KFZD-SW-310] ; Natural Science Foundation of Shandong Province[ZR2021MD090] |
WOS研究方向 | Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology |
语种 | 英语 |
出版者 | SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS |
WOS记录号 | WOS:000917345800051 |
资助机构 | National Natural Science Foundation of China ; Science and Technology Service Network Initiative, CAS ; Natural Science Foundation of Shandong Province |
源URL | [http://ir.igsnrr.ac.cn/handle/311030/189880] |
专题 | 中国科学院地理科学与资源研究所 |
通讯作者 | Yu, Quanzhou |
作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua, Zhejiang, Peoples R China 3.Chinese Res Inst Environm Sci, Res Ctr Ecol Civilizat, Beijing, Peoples R China 4.Liaocheng Ctr Data & Applicat Natl High Resolut E, Liaocheng, Shandong, Peoples R China 5.Liaocheng Univ, Sch Geog & Environm, Liaocheng, Shandong, Peoples R China |
推荐引用方式 GB/T 7714 | Jiang, Jie,Yu, Quanzhou,Liu, Yujie,et al. Seasonal variations of canopy spectra and their indications to carbon fluxes in a temperate forest in northeast China[J]. JOURNAL OF APPLIED REMOTE SENSING,2022,16(4):17. |
APA | Jiang, Jie.,Yu, Quanzhou.,Liu, Yujie.,Liang, Tianquan.,Tang, Qingxin.,...&Wang, Shaoqiang.(2022).Seasonal variations of canopy spectra and their indications to carbon fluxes in a temperate forest in northeast China.JOURNAL OF APPLIED REMOTE SENSING,16(4),17. |
MLA | Jiang, Jie,et al."Seasonal variations of canopy spectra and their indications to carbon fluxes in a temperate forest in northeast China".JOURNAL OF APPLIED REMOTE SENSING 16.4(2022):17. |
入库方式: OAI收割
来源:地理科学与资源研究所
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