Chapter 11 A Mega-Fire Event in Central Russia: Fire Weather, Radiative, and Optical Properties of the Atmosphere, and Consequences for Subboreal Forest Plants

Chubarova, Nataly; Prilepsky, Nickolay G.; Rublev, A. N.; Riebau, Allen R.

doi:10.1016/s1474-8177(08)00011-9

Cited by 17 publications

(24 citation statements)

References 3 publications

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“…At the same time, these SSA UV values are within the range of SSA obtained in UV-B spectral region in other geographical regions (Bais et al, 2007). We should note that according to our previous calculations (Chubarova et al, 2009), the best agreement between model and experimental UV data (and UV losses) in 2002 fire event was also observed after the application of SSA UV = 0.9 for AOT500 not exceeding 3.…”

Section: Instant Values Instant Values Mean Valuessupporting

confidence: 68%

“…At the same time the fraction of EW irradiance in UV300-380 nm is also decreased from typically 0.35 % to 0.2 %, when the most optically thick smoke aerosol cloud was observed. We should also note that similar higher attenuation in UV region compared with that for shortwave irradiance is described in Chubarova et al (2009) …”

Section: Solar Irradiance Loss At Ground Due To Smoke Aerosol In Diffsupporting

confidence: 63%

“…This is approximately 2 times larger than the previous maximum AOT500 ∼ 3 observed during the 2002 fire event (Chubarova et al, 2009). Note that these AOT maxima in 2010 were recorded simultaneously with the significant loss of solar irradiance and the unprecedented low visibility of about 100 meters.…”

Section: Instant Values Instant Values Mean Valuesmentioning

confidence: 61%

“…Note that this is the most severe attenuation of solar irradiance observed in clear sky conditions for the whole period of observations. The largest attenuation during the 2002 fire event reached 75 % for EW irradiance, 62 % for UV300-380 and 32 % for shortwave irradiance (Chubarova et al, 2009).…”

Section: Instant Values Instant Values Mean Valuesmentioning

confidence: 97%

“…In addition, the comparisons were made with the results obtained during the 2002 fire event in Central Russia described in Chubarova et al (2009), Gorchakov et al (2004, and Tarasova et al (2004), as well as during other wildfire conditions in different parts of the world Eck et al, 2003).…”

Section: Introductionmentioning

confidence: 96%

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Smoke aerosol and its radiative effects during extreme fire event over Central Russia in summer 2010

et al. 2012

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Abstract. Different microphysical, optical and radiative properties of aerosol were analyzed during the severe fires in summer 2010 over Central Russia using ground measurements at two AERONET sites in Moscow (Meteorological Observatory of Moscow State University -MSU MO) and Zvenigorod (Moscow Region) and radiative measurements at the MSU MO. Volume aerosol size distribution in smoke conditions had a bimodal character with the significant prevalence of fine mode particles, for which effective radius was shifted to higher values (r eff−fine = 0.24 µm against approximately 0.15 µm in typical conditions). For smoke aerosol, the imaginary part of refractive index (REFI) in the visible spectral region was lower than that for typical aerosol (REFI λ=675 nm = 0.006 against REFI λ=675 nm = 0.01), while single scattering albedo (SSA) was significantly higher (SSA λ=675 nm = 0.95 against SSA λ=675 nm ∼ 0.9). Extremely high aerosol optical thickness at 500 nm (AOT500) was observed on 6-8 August reaching the absolute maximum on 7 August in Moscow (AOT500 = 6.4) and at Zvenigorod (AOT500 = 5.9). A dramatic attenuation of solar irradiance at ground was also recorded. Maximum irradiance loss had reached 64 % for global shortwave irradiance, 91 % for UV radiation 300-380 nm, and 97 % for erythemally-weighted UV irradiance at relatively high solar elevation 47 • . Significant spectral dependence in attenuation of solar irradiance in smoky conditions was mainly explained by higher AOT and smaller SSA in UV (0.8-0.9) compared with SSA in the visible region of spectrum. The assessments of radiative forcing effect (RFE) at the TOA indicated a significant cooling of the smoky atmosphere. Instant RFE reached −167 Wm −2 at AOT500 = 6.4, climatological RFE calculated with August 2010 monthly mean AOT was about −65 Wm −2 , compared with −20 Wm −2 for typical aerosol according to the 10 yr period of measurements in Moscow.

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Section: Instant Values Instant Values Mean Valuessupporting

confidence: 68%

Section: Solar Irradiance Loss At Ground Due To Smoke Aerosol In Diffsupporting

confidence: 63%

Section: Instant Values Instant Values Mean Valuesmentioning

confidence: 61%

Section: Instant Values Instant Values Mean Valuesmentioning

confidence: 97%