Effects of meteorology and tropospheric aerosols on UV-B radiation: a 4-year study

Palancar, Gustavo Gerardo; Toselli, Beatriz M.

doi:10.1016/j.atmosenv.2004.01.036

Cited by 38 publications

(25 citation statements)

References 13 publications

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“…Based on the observed aerosol optical properties, the calculated AODs and SSAs were used in the TUV model to quantify the shortwave radiative flux. The δ‐Eddington approximation was used to calculate the solar component in the TUV model, and the aerosol attenuation coefficient profile used in the model can be found in Palancar and Toselli (). The aerosol DRF is defined as the difference between the net shortwave radiative flux with and without aerosols at the surface as follows:

{DRF}_{surface} = Flux {(net)}_{with aerosols, surface} - Flux {(net)}_{without aerosols, surface}

…”

Section: Experimental Methodsmentioning

confidence: 99%

Optical Properties of Aerosols and Implications for Radiative Effects in Beijing During the Asia‐Pacific Economic Cooperation Summit 2014

et al. 2017

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An intensive measurement campaign was conducted in Beijing during the Asia‐Pacific Economic Cooperation (APEC) Summit 2014 to investigate the effectiveness of stringent emission controls on aerosol optical properties and direct radiative forcing (DRF). Average values of PM2.5, light scattering (bscat), and light absorption (babs) coefficients decreased by 40, 64, and 56%, respectively, during the APEC control period compared with noncontrol periods. For the APEC control period, the PM2.5 mass scattering and absorption efficiencies were both smaller than the noncontrol period by a factor of ~2. Calculations based on a revised IMPROVE method and linear regression showed that sulfate, nitrate, organic matter, elemental carbon, and fine soil contributed comparably to the light extinction coefficient (bext) in both periods, but the bext values were 27–64% lower during the APEC period. A positive matrix factorization receptor model showed that bext from two secondary aerosol sources, biomass burning, traffic‐related emissions, and coal burning decreased by 26–87% during the APEC control period. The average DRF calculated from the Tropospheric Ultraviolet and Visible radiation model was −11.9 and −4.6 W m−2 at the surface during the noncontrol and APEC control periods, respectively, suggesting an overall cooling effect. The reduction of DRF from each emission source ranged from ~30–80% during the APEC control period. The results suggest that the pollution control measures implemented for APEC substantially reduced air pollution and could help mitigate the cooling effects of aerosols at the surface in Beijing.

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{DRF}_{surface} = Flux {(net)}_{with aerosols, surface} - Flux {(net)}_{without aerosols, surface}

…”

Section: Experimental Methodsmentioning

confidence: 99%

Optical Properties of Aerosols and Implications for Radiative Effects in Beijing During the Asia‐Pacific Economic Cooperation Summit 2014

et al. 2017

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“…Palancar and Toselli (2004) studied the influence of aerosols on UV-B in Argentina; Lorente et al (1994) found that UV-B decreased 25% due to changes of atmospheric conditions from clean to turbid; authors like Papayannis et al (1998); Kyling et al (1998); Krzyscin and Puchalski (1998); Balis et al (2002) and Zerefos et al (2002) studied the effects of aerosols on solar UV irradiances; Meleti and Capellini (2000) studied the correlation between aerosols' optical depth and UV-B and UV-A irradiances. Cachorro et al (2002) estimated the aerosol optical depth (AOD) in the UV spectral region.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet-B solar irradiance, the influence of Ångström turbidity, at Central Spain

Salvador

Bilbao

Miguel

2008

Journal of Atmospheric and Solar-Terrestrial Physics

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“…Measurements of EUV have mostly been conducted in mid-latitude locations or in temperate climate (McKenzie et al, 1991;Webb, 1991;Blumthaler et al, 1992;Frederick and Weatherhead, 1992;Krzyscin and Jaroslawski, 1997;Weihs and Webb, 1997;Foyo-Mereno et al, 1998;Nunez and Mhen, 1998;Cappellani and Kochler, 1999;Thorseth and Kjeldstad, 1999;Udelhofen et al, 1999;Dubrovsky, 2000;Ziemke et al, 2000;McKenzie et al, 2001;Bais et al, 2003;Murillo et al, 2003;Ogunjobi and Kim, 2004;Palancar and Toselli, 2004;Verdebout, 2004;Cordero et al, 2005;Kazantzidis et al, 2006;Seckmeyer et al, 2007). There is relatively limited information on EUV in the tropics, including Thailand (Bernhard et al, 1997;Roy et al, 1998;Ilyas et al, 1999;Kift et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

An investigation of solar erythemal ultraviolet radiation in the tropics: a case study at four stations in Thailand

Janjai

Kirdsiri

Masiri

et al. 2009

Intl Journal of Climatology

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Our study examines a 5-year data set of erythemal ultraviolet radiation (EUV) collected at four locations in Thailand: Chiang Mai (18.78°N, 98.98°E), Ubon Ratchathani (15.25°N, 104.87°E), Nakhon Pathom (13.82°N, 100.04°E) and Songkhla (7.20°N, 100.60°E). Seasonal changes are strongly influenced by the wet and dry season in this tropical environment, with maximum daily and noontime irradiances being reached in April or May, prior to the onset of the wet season. Transmission by aerosols, estimated by comparison of cloudless measured irradiance with a cloudless sky model, ranges from 51% at Chiang Mai to 83% at Songkhla during the dry season. By contrast, higher transmissions characterise the wet season when values around 90% are reached. Cloud cover further depletes the EUV irradiance and wet season transmissions range from 68% at Chiang Mai to 79% at Songkhla. Three of the four stations record increases in EUV irradiance over the study period.

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Effects of meteorology and tropospheric aerosols on UV-B radiation: a 4-year study

Cited by 38 publications

References 13 publications

Optical Properties of Aerosols and Implications for Radiative Effects in Beijing During the Asia‐Pacific Economic Cooperation Summit 2014

Optical Properties of Aerosols and Implications for Radiative Effects in Beijing During the Asia‐Pacific Economic Cooperation Summit 2014

Ultraviolet-B solar irradiance, the influence of Ångström turbidity, at Central Spain

An investigation of solar erythemal ultraviolet radiation in the tropics: a case study at four stations in Thailand

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