globalchange  > 气候变化事实与影响
DOI: 10.1016/j.jag.2015.03.015
Scopus记录号: 2-s2.0-84943653069
论文题名:
Discriminating lava flows of different age within Nyamuragira's volcanic field using spectral mixture analysis
作者: Li L; , Canters F; , Solana C; , Ma W; , Chen L; , Kervyn M
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2015
卷: 40
起始页码: 1
结束页码: 10
语种: 英语
英文关键词: ALI ; Lava flow ; Nyamuragira ; Pleiades ; Spectral mixture analysis ; Vegetation fraction
Scopus关键词: Landsat thematic mapper ; lava flow ; Pleiades ; remote sensing ; satellite imagery ; spectral analysis ; vegetation cover ; Democratic Republic Congo ; Nord Kivu ; Nyamuragira
英文摘要: In this study, linear spectral mixture analysis (LSMA) is used to characterize the spectral heterogeneity of lava flows from Nyamuragira volcano, Democratic Republic of Congo, where vegetation and lava are the two main land covers. In order to estimate fractions of vegetation and lava through satellite remote sensing, we made use of 30mresolution Landsat Enhanced Thematic Mapper Plus (ETM+) and Advanced Land Imager (ALI) imagery. 2m Pleiades data was used for validation. From the results, we conclude that (1) LSMA is capable of characterizing volcanic fields and discriminating between different types of lava surfaces; (2) three lava endmembers can be identified as lava of old, intermediate and young age, corresponding to different stages in lichen growth and chemical weathering; (3) a strong relationship is observed between vegetation fraction and lava age, where vegetation at Nyamuragira starts to significantly colonize lava flows ~15 years after eruption and occupies over 50% of the lava surfaces ~40 years after eruption. Our study demonstrates the capability of spectral unmixing to characterize lava surfaces and vegetation colonization over time, which is particularly useful for poorly known volcanoes or those not accessible for physical or political reasons. © 2015 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79614
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: Department of Geography and Earth System Science, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium; Cartography and GIS Research Group, Department of Geography, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium; School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, United Kingdom; Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Yutian Road 500, Shanghai, China; School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Daxue Road 1, Xuzhou, China

Recommended Citation:
Li L,, Canters F,, Solana C,et al. Discriminating lava flows of different age within Nyamuragira's volcanic field using spectral mixture analysis[J]. International Journal of Applied Earth Observation and Geoinformation,2015-01-01,40
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Li L]'s Articles
[, Canters F]'s Articles
[, Solana C]'s Articles
百度学术
Similar articles in Baidu Scholar
[Li L]'s Articles
[, Canters F]'s Articles
[, Solana C]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Li L]‘s Articles
[, Canters F]‘s Articles
[, Solana C]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.