Seasonal variations of live moisture content and ignitability in shrubs of the Mediterranean Basin
Seasonal variations of live moisture content and ignitability in shrubs of the Mediterranean Basin
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DOI：
10.1071/wf05088
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发表时间：
2007-11
影响因子：
3.1
通讯作者：
G. Pellizzaro;P. Duce;A. Ventura;P. Zara
中科院分区：
文献类型：
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作者：
G. Pellizzaro;P. Duce;A. Ventura;P. Zara
本研究的目的是（i）描述的点火延迟（ID时间）和水分含量的活细燃料（LFMC）的西地中海盆地的8种常见灌木物种的季节性模式，及（ii）评估LFMC和可燃性之间的关系。实验在位于意大利撒丁岛的灌木区进行。LFMC和点火时间或ID时间值每月或全年每月两次测定。可燃性由实验室试验确定。气象数据也收集了位于研究区域的气象站。ID时间与LFMC显着的线性回归方程，发现大多数物种，R2值范围从67%到94%。一般而言，当LFMC范围为70 - 100%时，观察到ID时间值非常低。此外，根据LFMC和ID时间（或可燃性）的季节变化，确定了两组物种：（i）LFMC不大于100%且全年都具有高可燃性值的物种，以及（ii）LFMC季节变化大且可燃性值冬季低夏季高的物种。还观察到物种间可燃性的显著差异。
The objectives of the present study were (i) to describe the seasonal pattern of ignition delay (ID time) and moisture content of live fine fuel (LFMC) for eight common shrub species of the Western Mediterranean Basin, and (ii) to evaluate the relationships between LFMC and ignitability. The experiment was carried out in a shrubland area located in Sardinia, Italy. LFMC and time to ignition or ID time values were determined monthly or twice a month throughout the year. Ignitability was determined by laboratory tests. Meteorological data were also collected from a weather station located in the study area. Significant linear regression equations of ID time v. LFMC were found for most of the species, with R2 values ranging from 67 to 94%. In general, very low values of ID time were observed when LFMC ranged from 70 to 100%. In addition, two groups of species were identified, depending on seasonal changes of both LFMC and ID time (or ignitability): (i) species with LFMC not greater than 100% and high ignitability values all throughout the year, and (ii) species with large seasonal variability of LFMC and ignitability values that were low in winter and high in summer. Significant differences in ignitability among species were also observed.