Publication
Title
Organic matter and wettability characteristics of wildfire ash from Mediterranean conifer forests
Author
Abstract
Thermogravimetric analysis (TGA) and water repellency (wettability) determination of ash samples collected following wildfires at four different Mediterranean conifer forest sites in eastern Spain were conducted to provide insights into variations in key chemical and physical characteristics of ash. TGA allowed the evaluation of organic matter (OM) and inorganic carbonate (IC) characteristics and their role in ash wettability. Thermogravimetric profiles were recorded for 40 ash samples (ten from each site). The persistence of water repellency of all ash samples was assessed by the Water Drop Penetration Time (WDPT) test. OM contents decreased, whilst OM stability indices and IC contents increased with increasing combustion completeness. The highest carbon fixation in IC was determined at the site that had experienced the most severe fire. WDPT values were positively correlated with OM and negatively with IC contents. All strongly to severely water repellent ash samples had OM/IC ratio above 2. Pools of OM in ash formed during wildfires represent a more resistant pool of C compared to their unburned precursors. Together with the new IC pool formed in ash, both pools could represent a carbon sink triggered by wildfire.
Language
English
Source (journal)
Catena: an interdisciplinary journal of geomorphology, hydrology, pedology. - Giessen
Publication
Giessen : 2015
ISSN
0341-8162
Volume/pages
135(2015), p. 369-376
ISI
000366225900039
Full text (Publishers DOI)
Full text (publishers version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 24.07.2014
Last edited 28.05.2017
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