Weather and climate description of anomalous summer 2012 in Tomsk region

Polyakov, D. V.; Barashkova, N. K.; Kuzhevskaya, Irina V.

doi:10.3103/s106837391401004x

Cited by 12 publications

(10 citation statements)

References 2 publications

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“…After 8-10 August, the blocking cyclone started to break, heat rapidly weakened, and air temperature returned to within the climatic norm at all meteorological stations of Tomsk region (Polyakov et al, 2014). The AOD data indicate that there are two waves of high atmospheric smoke turbidities, from 17 June to 5 July and from 19 July to 6 August.…”

Section: Weather-climate Featuresmentioning

confidence: 88%

“…In summer 2012, a stable anticyclone had formed over the territory of Siberia under the conditions of a smallgradient high-pressure baric field (Polyakov et al, 2014). The consequences were substantial changes in climatically significant characteristics and, primarily, an appreciable increase in air temperature, and a decrease in precipitation.…”

Section: Weather-climate Featuresmentioning

confidence: 99%

“…A Selyaninov hydrothermal wetting coefficient was also used as a characteristic of a wetting (drought) regime (see e.g. Polyakov et al, 2014); it is defined as the ratio of total precipitation for a period no shorter than 1 month to the sum of temperatures for the same period, decreased by a factor of 10. Polyakov et al (2014) showed that, over the last 70 years, the atmospheric droughts in Tomsk were longer than 1 month over 9 summers (the hydrothermal wetting coefficient varied from 0.6 to 1.4), with the summer of 2012 being the driest.…”

Section: Weather-climate Featuresmentioning

confidence: 99%

“…A stable anticyclone had formed in summer 2012 in Siberia under the conditions of a small-gradient highpressure baric field (Polyakov et al, 2014), with the consequences being that forest and peat fires burned in a few regions of Siberia and encompassed the territory from 1 to 10 million hectares, by different estimates. Optical and microphysical properties of near-ground aerosol and specific features of their vertical structure according to data from in situ measurements, as well as spatio-temporal evolution of aerosol optical depth and active fires according to results of satellite monitoring, are presented in (Gorchakov et al, 2014;Kozlov et al, 2014;Sklyadneva et al, 2015;Vinogradova et al, 2015;Panchenko et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Radiative characteristics of aerosol during extreme fire event over Siberia in summer 2012

et al. 2017

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Abstract. Microphysical and optical properties of aerosol were studied during a mega-fire event in summer 2012 over Siberia using ground-based measurements of spectral solar radiation at the AERONET site in Tomsk and satellite observations. The data were analysed using multi-year (2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013) measurements of aerosol characteristics under background conditions and for less intense fires, differing in burning biomass type, stage of fire, remoteness from observation site, etc. ("ordinary" smoke). In June-August 2012, the average aerosol optical depth (AOD, 500 nm) had been 0.95 ± 0.86, about a factor of 6 larger than background values (0.16 ± 0.08), and a factor of 2.5 larger than in ordinary smoke. The AOD values were extremely high on 24-28 July and reached 3-5. A comparison with satellite observations showed that ground-based measurements in the region of Tomsk not only reflect the local AOD features, but are also characteristic for the territory of Western Siberia as a whole. Single scattering albedo (SSA, 440 nm) in this period ranged from 0.91 to 0.99 with an average of ∼ 0.96 in the entire wavelength range of 440-1020 nm. The increase in absorptance of aerosol particles (SSA(440 nm) = 0.92) and decrease in SSA with wavelength observed in ordinary smoke agree with the data from multi-year observations in analogous situations in the boreal zone of USA and Canada. Volume aerosol size distribution in extreme and ordinary smoke had a bimodal character with significant prevalence of finemode particles, but in summer 2012 the mean median radius and the width of the fine-mode distribution somewhat increased. In contrast to data from multi-year observations, in summer 2012 an increase in the volume concentration and median radius of the coarse mode was observed with growing AOD.The calculations of the average radiative effects of smoke and background aerosol are presented. Compared to background conditions and ordinary smoke, under the extreme smoke conditions the cooling effect of aerosol considerably intensifies: direct radiative effects (DRE) at the bottom (BOA) and at the top of the atmosphere (TOA) are −13, −35, and −60 W m −2 and −5, −14, and −35 W m −2 respectively. The maximal values of DRE were observed on 27 July (AOD(500 nm) = 3.5), when DRE(BOA) reached −150 W m −2 , while DRE(TOA) and DRE of the atmosphere were −75 W m −2 . During the fire event in summer 2012 the direct radiative effect efficiency varied in range: at the BOA it was −80-−40 W m −2 , at the TOA it was −50-−20 W m −2 and in the atmosphere it was −35-−20 W m −2 .

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Section: Weather-climate Featuresmentioning

confidence: 88%

Section: Weather-climate Featuresmentioning

confidence: 99%

Section: Weather-climate Featuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Radiative characteristics of aerosol during extreme fire event over Siberia in summer 2012

et al. 2017

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“…Значительные положительные аномалии температуры воздуха наблюдали впервые за последние 60 лет. Месячные показатели температуры воздуха за июнь 2012г в Томске превысили свои многолетние значения на 5,3° С. В июле, при некотором ослаблении жары, аномалия среднемесячной температуры воздуха составила 2,3° С [8]. Таким образом, в летний период 2012г на территории г. Томска были зарегистрированы так называемые волны тепла (ВТ), представляющие собой промежуток времени продолжительностью не менее 5 дней и удовлетворяющие следующему условию: превышение (без перерыва) среднесуточной температуры воздуха относительно своего среднего многолетнего значения ≥1,25×σ (σ -стандартное отклонение среднемесячной температуры воздуха для каждого месяца) [9].…”

Section: материал и методыunclassified

Specifics of Development and Course of Acute Coronary Insufficiency During Extreme Heat Weather Conditions

Гарганеева¹,

Кужелева²,

Горбатенко³

et al. 2017

Kardiovask. ter. profil.

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ВСС-внезапная сердечная смерть, ВТ-волны тепла, ИМ-инфаркт миокарда, ОИМ-острый инфаркт миокарда, РОИМ-"Регистр острого инфаркта миокарда", ССЗ-сердечнососудистые забо левания. clinical forms of MI demands for the improvement of information in general population.

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Influence of the Tropical Indian Ocean Tripole on Summertime Cold Extremes Over Central Siberia

Zhang

Diao

et al. 2022

Geophysical Research Letters

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This study investigates the influence of the interannual variability of Indian Ocean tripole (IOT) on summertime cold extremes in Central Siberia. During positive IOT phases, two cross‐equatorial airflows are induced over the tropical eastern and western Indian Ocean. These strengthen ascending motion over the southern tropical Asia (80°–125°E, 15°–25°N), increasing precipitation in situ, as evidenced in observations and simulations by using Community Atmosphere Model. Serving as a heat source, the induced upper‐level Asian continent meridional teleconnection (ACMT) pattern transports the signals from southern tropical Asia into Central Siberia. Positive upper‐level geopotential height anomalies over Central Siberia induced by ACMT favor more solar radiation to reach the surface and raise local surface temperatures through modulating the tropospheric air expansion/compression, further reducing the extreme cold days. Consequently, the ACMT induced by latent heat fluxes associated with precipitation anomalies acts as an atmospheric bridge that links the IOT to Central Siberia cold extremes.

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Weather and climate description of anomalous summer 2012 in Tomsk region

Cited by 12 publications

References 2 publications

Radiative characteristics of aerosol during extreme fire event over Siberia in summer 2012

Radiative characteristics of aerosol during extreme fire event over Siberia in summer 2012

Specifics of Development and Course of Acute Coronary Insufficiency During Extreme Heat Weather Conditions

Influence of the Tropical Indian Ocean Tripole on Summertime Cold Extremes Over Central Siberia

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