Analysis on Vegetations Spectral Characteristics along the Altitudinal Gradients in South-Facing Slope of Dangxiong Valley
JIAO Quan-jun1, ZHANG Bing1*, LIU Liang-yun1, HE Yong-tao2, HU Yong1
1. Key Laboratory of Digital Earth Sciences, Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China 2. Lhasa Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Abstract：The present study focused on variation of vegetation types and canopy spectra along the altitudinal gradients in south-facing slope of Dangxiong valley in Tibet. Spectral extraction methods including red edge analysis and vegetation indices were used for vegetation spectral characteristics analysis. Through the hierarchical clustering analysis based on the vegetation spectral features, the feasibility of remote sensing classification of vegetation types along the elevation gradients in the experimental area was evaluated. The experimental results showed that: there were significant differences in spectral features including water index (WI), red edge POSITION (REP), and normalized difference vegetation index (NDVI) in different plots along elevation gradients in the study area, and there were strong correlations between WI and leaf water content, REP and dry biomass, NDVI and vegetation coverage. The hierarchical clustering analysis result of 12 vegetation samples along the altitudinal gradients is consistent with the ground survey, which shows that the selected vegetation spectral features can characterize the vertical distribution of vegetation types in the experimental area. The vegetation spectral analysis in this study can provide the priori knowledge support of spectral characteristics for the vegetation vertical distribution information extraction in the Tibet Plateau.
焦全军1, 张 兵1*, 刘良云1, 何永涛2, 胡 勇1 . 西藏当雄河谷阳坡海拔梯度上植被光谱特征分析[J]. 光谱学与光谱分析, 2012, 32(10): 2810-2814.
JIAO Quan-jun1, ZHANG Bing1*, LIU Liang-yun1, HE Yong-tao2, HU Yong1 . Analysis on Vegetations Spectral Characteristics along the Altitudinal Gradients in South-Facing Slope of Dangxiong Valley . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(10): 2810-2814.
[1] Diego R L, David N B, Helios S O, et al. Journal of Biogeography, 2012, 39(1): 162. [2] LIU Zeng-li, ZHENG Cheng-yang, FANG Jing-yun(刘增力, 郑成洋, 方精云). Biodiversity Science(生物多样性), 2004, 12(1): 146. [3] LUO Yong, ZHANG Bai-ping(罗 勇, 张百平). Geographical Research(地理科学), 2006, 26(5): 574. [4] Elhadi A, Onisimo M. Journal of Photogrammetry and Remote Sensing, 2010, 64(6): 612. [5] Wen Q K, Zhang Z X, Liu S, et al. Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2010, 3(3): 404. [6] XU Juan, ZHANG Bai-ping, TAN Jing, et al(许 娟, 张百平, 谭 靖, 等). Journal of Mountain Science(山地学报), 2009, 27(6): 663. [7] JIA Jian-hua, HU Yong, LIU Liang-yun(贾建华, 胡 勇, 刘良云). Journal of Geo-Information Science(地球信息科学学报), 2010, 12(6): 880. [8] Yilmaz M T, Hunt Jr E R, Jacksona T J. Remote Sensing of Environment, 2008, 112(5): 2514. [9] Smith K L, Stevenb M D, Collsa J J. Remote Sensing of Environment, 2004, 92(2): 207. [10] NIU Zheng, CHEN Yong-hua, SUI Hong-zhi, et al(牛 铮, 陈永华, 隋洪智, 等). Chinese Journal of Remote Sensing(遥感学报), 2000, 4(2): 125. [11] Castro K L, Sanchez-Azofeifa G A. Sensors, 2008, 8(1): 51. [12] Penuelas J, Pinol J, Ogaya R, et al. International Journal of Remote Sensing, 1997, 18(13): 2869. [13] Serrano L, González-Flor C, Gorchs G. Remote Sensing of Environment, 2012, 118: 249. [14] Miller J R, Hare E W, Wu J. International Journal of Remote Sensing, 1990, 11: 1755. [15] Haboudane D, Miller J R, Pattey E, et al. Remote Sensing of Environment, 2004, 90(3): 337. [16] Gttlichera D, Alberta J, Naussb T, et al. Ecological Modelling, 2011, 222(3): 493. [17] GAO Yan-hua, CHEN Liang-fu, ZHOU Xu, et al(高彦华, 陈良富, 周 旭, 等). Chinese Journal of Remote Sensing(遥感学报), 2009, 13(4): 623. [18] Chen P, Driss H, Nicolas T, et al. Remote Sensing of Environment, 2010, 114(9): 1987.
