Hyperspectral Reflectance and Chemical Composition of Pre- and Post-Fire Soils from Three 2021 Western USA Megafires

被引:0
|
作者
Raeofy, Yasaman [1 ,2 ]
Samburova, Vera [1 ,2 ]
Berli, Markus [3 ]
Sion, Brad [4 ]
Moosmueller, Hans [1 ]
机构
[1] Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
[2] Univ Nevada, Dept Phys, Reno, NV 89557 USA
[3] Desert Res Inst, Div Hydrol Sci, Las Vegas, NV 89119 USA
[4] Desert Res Inst, Div Earth & Ecosyst Sci, Reno, NV 89512 USA
来源
FIRE-SWITZERLAND | 2023年 / 6卷 / 12期
基金
美国国家科学基金会;
关键词
hyperspectral reflectance; water-repellent soils; Fourier-transform infrared spectroscopy; carbonate; WATER REPELLENCY; FT-IR; ORGANIC-MATTER; ASH; SPECTROSCOPY; CARBONATE;
D O I
10.3390/fire6120471
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Over the past two decades, wildfire activity in the western USA has increased, especially in California. Wildfires not only affect air quality but also the environment at large, including chemical and physical properties of fire-affected soils, which are of great interest for prediction and mitigation of hydrological consequences. Hyperspectral reflectance can be used to remotely assess the effects of fires on soil and here we use it to characterize soils before and after three 2021 California wildfires (Dixie, Beckwourth Complex, and Caldor fire). We acquired reflectance spectra and compared changes in these spectra with changes in the chemistry of analyzed soils. For all three fires, the results show that 700 nm wavelength reflectance of ash samples collected 1 and 1.5 years after fire decreased between 36% and 76% compared to that of samples collected right after the fires. Additionally, significantly higher visible reflectance has been found for unburned compared to burned soil samples in each region that was studied. Infrared transmission measurements were used to characterize the carbonate content of soil and ash samples demonstrating a mostly positive relationship between carbonate content and visible reflectance, indicating a possible cause and effect between the two.
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页数:14
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