Is hyperspectral imaging a possible new approach for fire reconstruction?
Abstract
Lacustrine records hold considerable archives providing access to paleoenvironmental reconstructions such as paleofire. However, to reach this goal, it is necessary to develop fast, non-destructive and high resolution methods. In this study we develop a new fire reconstitution proxy by studying a lacustrine core sampled in an area concerned by fire events (Esterel massif, SE France). In this aim, we seek for charcoals deposited and preserved in lake sediments by coupling complementary methods: classical charcoals counting, spectrophotometry and hyperspectral analyses in the VIS-NIR range. Charcoal counting is destructive, time consuming and provides data at low resolution. Spectrophotometry is used classically to quantify color is non-destructive, very fast, and provides data at an intermediate resolution (2 mm). Hyperspectral data have the same advantage than spectrophotometry but with higher spatial resolution (43 um pixel size) and higher spectral resolution (3 nm). Our main finding is based on the identification of a new proxy for fire signal obtained at very high resolution with hyperspectral investigations.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2013
- Bibcode:
- 2013AGUFMPP11C1830D
- Keywords:
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- 0458 BIOGEOSCIENCES Limnology;
- 1165 GEOCHRONOLOGY Sedimentary geochronology;
- 0428 BIOGEOSCIENCES Carbon cycling