Remote Sensing | |
Warming, Sheep and Volcanoes: Land Cover Changes in Iceland Evident in Satellite NDVI Trends | |
Martha Raynolds1  Borgþór Magnússon3  Sigmar Metúsalemsson3  Sigurður H. Magnússon3  Santonu Goswami2  Daniel J. Hayes2  Guido Grosse2  Benjamin Jones2  Alfredo R. Huete2  | |
[1]Institute of Arctic Biology, University of Alaska Fairbanks, PO Box 757000, Fairbanks AK 99775, USA | |
[2]id="af1-remotesensing-07-09492">Institute of Arctic Biology, University of Alaska Fairbanks, PO Box 757000, Fairbanks AK 99775, U | |
[3]Icelandic Institute of Natural History, PO Box 125, 212 Garðabær, Iceland | |
[4] E-Mails: | |
关键词: AHVRR; MODIS; land cover; land use; NDVI; | |
DOI : 10.3390/rs70809492 | |
来源: mdpi | |
【 摘 要 】
In a greening Arctic, Iceland stands out as an area with very high increases in the AVHRR Normalized Difference Vegetation Index (NDVI, 1982–2010). We investigated the possible sources of this anomalous greening in Iceland’s dynamic landscape, analyzing changes due to volcanism and warming temperatures, and the effects of agricultural and industrial land use changes. The analysis showed the increases were likely due to reductions in grazing in erosion-prone rangelands, extensive reclamation and afforestation efforts, as well as a response to warming climate, including glacial retreat. Like Scandinavia and much of the rest of the Arctic, Iceland has shown a recent reduction in NDVI since 2002, but still above pre-2000 levels. Theil-Sen robust regression analysis of MODIS NDVI trends from 2002 to 2013 showed Iceland had a slightly negative NDVI trend of 0.003 NDVI units/year (
【 授权许可】
CC BY
© 2015 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
Files | Size | Format | View |
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RO202003190008769ZK.pdf | 7554KB | download |