Рубрики:
CARBON
SIBERIA
FLUXES
GASES
GROSS
NET
Кл.слова (ненормированные):
remote sensing data -- active burning zone -- fire radiative power -- intensity -- fuel combustion completeness -- emission
CARBON
SIBERIA
FLUXES
GASES
GROSS
NET
Кл.слова (ненормированные):
remote sensing data -- active burning zone -- fire radiative power -- intensity -- fuel combustion completeness -- emission
Аннотация: This study is based on the processing of satellite imagery in the wave range 3.93-3.99 mu m (Terra/Modis satellite) and numerical simulation results. It has been found for combustion conditions in Siberian forests that the observed fire radiative power (FRP) is 15% of the total fire power. Variations between 10 and 30% depend on both the fire development scenario (specific burnup rate of 0.01-0.1 kg/m(2) s and fire front velocity of 0.01-0.1 m/s) and the conditions for remote imaging. Instrumental estimates for the ratio of fire areas by given intensity quantiles for Siberian forests are presented. The share of low-, medium-, and high-intensity fires is 41.2-58.9, 35.0-46.5, and 6.10-13.44% of the total area. Refined estimates of fire emissions have been obtained taking into account the amount of biomass burnt and variable burning intensity. The proposed method allows the mass of burned forest fuel materials (FFM) and direct fire emissions to be estimated quantitatively at a level 14-21% lower than the values calculated with the help of standard approaches. The estimates of direct carbon emissions in the given time interval of 2002-2016 were 83 +/- 21 Tg/year on average, which is 17% lower than the value 112 +/- 25 Tg/year obtained with the standard method.
WOS
Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Fed Res Ctr KSC SB RAS, Krasnoyarsk, Russia.
Fed Res Ctr KSC SB RAS, Joint Reg Ctr Remote Sensing, Krasnoyarsk, Russia.
Russian Acad Sci, Kutateladze Inst Thermophys, Siberian Branch, Novosibirsk, Russia.
Доп.точки доступа:
Ponomarev, E. I.; Shvetsov, E. G.; Litvintsev, K. Yu.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Region; Krasnoyarsk krai Foundation for Research and Development Support [17-41-240475]