Monitoring the Impacts of Severe Drought on Southern California Chaparral Species using Hyperspectral and Thermal Infrared Imagery
作者： Austin Coates , Philip Dennison , Dar Roberts , Keely Roth
DOI: 10.3390/RS71114276
关键词:
摘要: Airborne hyperspectral and thermal infrared imagery acquired in 2013 2014, the second third years of a severe drought California, were used to assess impacts on dominant plant species. A relative green vegetation fraction (RGVF) calculated from 2013–2014 Visible Infrared Imaging Spectrometer (AVIRIS) data using linear spectral unmixing revealed seasonal multi-year changes pre-drought 2011 reference AVIRIS image. Deeply rooted tree species found mesic areas showed least change RGVF. Coastal sage scrub demonstrated highest variability, as well longer-term decline Ceanothus apparently well-adapted long-term among chaparral species, showing persistent declines RGVF over 2014. Declining was associated with higher land surface temperature retrieved MODIS-ASTER Simulator (MASTER) data. Combined collection may offer new opportunities for mapping monitoring ecosystems.
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