干旱区生态环境知识资源中心(Arid): The necessity and availability of noise-free daily satellite-observed NDVI during rapid phenological changes in terrestrial ecosystems in East Asia

Arid

DOI	10.1080/21580103.2011.643388
	The necessity and availability of noise-free daily satellite-observed NDVI during rapid phenological changes in terrestrial ecosystems in East Asia
	Nagai, Shin; Saitoh, Taku M.; Suzuki, Rikie; Nasahara, Kenlo Nishida; Lee, Woo-Kyun; Son, Yowhan; Muraoka, Hiroyuki
通讯作者	Nagai, S
来源期刊	FOREST SCIENCE AND TECHNOLOGY
ISSN	2158-0103
EISSN	2158-0715
出版年	2011
卷号	7 期号:4 页码:174-183
英文摘要	General, global, long-term, and comprehensive phenological observations are required to evaluate the variability of photosynthetic activities due to environmental changes in terrestrial ecosystems. The observation of seasonal changes and detection of interannual variation in canopy phenology over regional and global scales require satellite data with high temporal resolution (i.e. a daily time step). However, satellite data often include noise caused by snow cover on vegetation, cloud contamination, and atmospheric aerosols. To accurately detect the timing of leaf-expansion and leaf-fall, which occur rapidly, and their rates, it is necessary to examine the observational frequency of noise-free satellite-observed vegetation index data during each phenological period. In this study, we investigated the spatiotemporal distribution of the number of observational days (NUMdays) in the Terra/MODIS (Moderate Resolution Imaging Spectroradiometer)-observed daily high-quality normalized difference vegetation index (NDVIhigh) data with no effects of snow cover, cloud contamination, or atmospheric noise. These data were examined for each month over 10 years in the various ecosystems of East Asia. To ground-truth the relationship between the Terra/MODISobserved daily NDVIhigh data and canopy surface images, we performed a long-term continuous field study in a cooltemperate deciduous broad-leaved forest in central Japan. During the leaf-expansion and leaf- fall periods, the NUMdays for NDVIhigh data in southern Russia, northeastern China, the Tibetan Plateau, Korea, and maritime Japan was about 3-7 for each month. The NUMdays for NDVIhigh data exceeded 10 for each month in arid regions during the growing season and in the subtropical region including northeastern India, Myanmar, and southwestern China during the dry season. In contrast, the NUMdays for NDVIhigh data was almost 0 for each month in southeastern China throughout the year and in the subtropical region during the southeastern monsoon season (July and August). By considering observations from both the Terra/MODIS and Aqua/MODIS satellites, the NUMdays for NDVIhigh data in the deciduous broad-leaved forest in Japan was increased by 40% compared with only Terra/MODIS satellite observations. Our findings indicate that daily NDVIdata from multiple satellites detect the seasonal changes in the various ecosystems of East Asia more accurately than 8-day or biweekly composite NDVI data.
英文关键词	East Asia ground-truthing leaf-expansion leaf-fall MODIS phenology
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	ESCI
WOS记录号	WOS:000409690400006
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/329783
作者单位	[Nagai, Shin; Suzuki, Rikie] Japan Agcy Marine Earth Sci & Technol, Res Inst Global Change, Kanazawa Ku, 3173-25 Showa Machi, Yokohama, Kanagawa 2360001, Japan; [Saitoh, Taku M.; Muraoka, Hiroyuki] Gifu Univ, River Basin Res Ctr, Gifu 5011193, Japan; [Nasahara, Kenlo Nishida] Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan; [Lee, Woo-Kyun; Son, Yowhan] Korea Univ, Dept Environm Sci & Ecol Engn, Seoul 136713, South Korea
推荐引用方式 GB/T 7714	Nagai, Shin,Saitoh, Taku M.,Suzuki, Rikie,et al. The necessity and availability of noise-free daily satellite-observed NDVI during rapid phenological changes in terrestrial ecosystems in East Asia[J],2011,7(4):174-183.
APA	Nagai, Shin.,Saitoh, Taku M..,Suzuki, Rikie.,Nasahara, Kenlo Nishida.,Lee, Woo-Kyun.,...&Muraoka, Hiroyuki.(2011).The necessity and availability of noise-free daily satellite-observed NDVI during rapid phenological changes in terrestrial ecosystems in East Asia.FOREST SCIENCE AND TECHNOLOGY,7(4),174-183.
MLA	Nagai, Shin,et al."The necessity and availability of noise-free daily satellite-observed NDVI during rapid phenological changes in terrestrial ecosystems in East Asia".FOREST SCIENCE AND TECHNOLOGY 7.4(2011):174-183.