scholarly journals Solar UV radiation and microbial life in the atmosphere

2018 ◽  
Vol 17 (12) ◽  
pp. 1918-1931 ◽  
Author(s):  
Sasha Madronich ◽  
Lars Olof Björn ◽  
Richard L. McKenzie
Keyword(s):  
Uv Radiation ◽  
Seasonal Patterns ◽  
Microbial Life ◽  
Solar Uv Radiation ◽  
Solar Uv ◽  
Solar Ultraviolet

Many microorganisms are alive while suspended in the atmosphere, but are exposed to solar ultraviolet (UV) radiation from all directions. Geographic and seasonal patterns of DNA-damaging UV doses can be estimated from observations as well as modeling.

scholarly journals Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa

2019 ◽  
Vol 37 (2) ◽  
pp. 129-141 ◽  
Author(s):  
David J. du Preez ◽  
Jelena V. Ajtić ◽  
Hassan Bencherif ◽  
Nelson Bègue ◽  
Jean-Maurice Cadet ◽  
...  
Keyword(s):  
South Africa ◽  
Ultraviolet Radiation ◽  
Uv Radiation ◽  
Stratospheric Ozone ◽  
Solar Ultraviolet Radiation ◽  
Clear Sky ◽  
Solar Uv Radiation ◽  
Solar Uv ◽  
Solar Ultraviolet ◽  
Ozone Levels

Abstract. The correlation between solar ultraviolet radiation (UV) and atmospheric ozone is well understood. Decreased stratospheric ozone levels which led to increased solar UV radiation levels at the surface have been recorded. These increased levels of solar UV radiation have potential negative impacts on public health. This study was done to determine whether the break-up of the Antarctic ozone hole has an impact on stratospheric columnar ozone (SCO) and resulting ambient solar UV-B radiation levels at Cape Point, South Africa, over 2007–2016. We investigated the correlations between UV index, calculated from ground-based solar UV-B radiation measurements and satellite-retrieved column ozone data. The strongest anti-correlation on clear-sky days was found at solar zenith angle 25∘ with exponential fit R2 values of 0.45 and 0.53 for total ozone column and SCO, respectively. An average radiation amplification factor of 0.59 across all SZAs was calculated for clear-sky days. The MIMOSA-CHIM model showed that the polar vortex had a limited effect on ozone levels. Tropical air masses more frequently affect the study site, and this requires further investigation.

scholarly journals Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa

2018 ◽  
Author(s):  
D. Jean du Preez ◽  
Jelena V. Ajtić ◽  
Hassan Bencherif ◽  
Nelson Bègue ◽  
Caradee Y. Wright
Keyword(s):  
South Africa ◽  
Ultraviolet Radiation ◽  
Uv Radiation ◽  
Stratospheric Ozone ◽  
Polar Vortex ◽  
Solar Ultraviolet Radiation ◽  
Solar Uv Radiation ◽  
Solar Uv ◽  
Solar Ultraviolet ◽  
Ozone Levels

Abstract. The correlation between solar ultraviolet radiation (UV) and atmospheric ozone is well understood. Decreased stratospheric ozone levels which led to increased solar UV radiation levels at the surface have been recorded. These increased levels of solar UV radiation have potential negative impacts on public health. This study was done to determine whether or not the break-up of the Antarctic ozone hole has an impact on stratospheric columnar ozone (SCO) concentrations and resulting ambient solar UV-B radiation levels at Cape Point, South Africa. At Cape Point, the strongest anti-correlation on clear-sky days was found at solar zenith angle 20° with exponential fit R2 values of 0.71 and 0.66 for total ozone column and SCO, respectively. An average radiation amplification factor of 0.92 was found and the largest decrease in ozone levels occurred during September months. The MIMIOSA-CHIM model showed that the polar vortex had a limited effect on ozone levels at 435–440 K for September and 600 K over Cape Point during November. Tropical air-masses more frequently affect the study site, and this requires further investigation.

Diffuse Solar UV Radiation and Implications for Preventing Human Eye Damage¶

2001 ◽  
Vol 73 (2) ◽  
pp. 135 ◽  
Author(s):  
Alfio V. Parisi ◽  
Adele Green ◽  
Michael G. Kimlin
Keyword(s):  
Uv Radiation ◽  
Human Eye ◽  
Solar Uv Radiation ◽  
Eye Damage ◽  
Solar Uv

scholarly journals The Early Days of Personal Solar Ultraviolet Dosimetry

Atmosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 125 ◽  
Author(s):  
Brian Diffey
Keyword(s):  
Uv Radiation ◽  
Human Exposure ◽  
Ground Level ◽  
Uv Exposure ◽  
Population Exposure ◽  
Atmospheric Ozone ◽  
Quantitative Understanding ◽  
Solar Uv ◽  
The Impact ◽  
Solar Ultraviolet

In the early 1970s, environmental conservationists were becoming concerned that a reduction in the thickness of the atmospheric ozone layer would lead to increased levels of ultraviolet (UV) radiation at ground level, resulting in higher population exposure to UV and subsequent harm, especially a rise in skin cancer. At the time, no measurements had been reported on the normal levels of solar UV radiation which populations received in their usual environment, so this lack of data, coupled with increasing concerns about the impact to human health, led to the development of simple devices that monitored personal UV exposure. The first and most widely used UV dosimeter was the polymer film, polysulphone, and this review describes its properties and some of the pioneering studies using the dosimeter that led to a quantitative understanding of human exposure to sunlight in a variety of behavioral, occupational, and geographical settings.

scholarly journals Biologically effective doses of ambient solar-UV radiation in Indonesia and Japan

2000 ◽  
pp. 123 ◽  
Author(s):  
Nobuo Munakata ◽  
Santoso Cornain ◽  
Ketut Mulyadi ◽  
Masamitsu Ichihashi ◽  
Joedo Prihartono ◽  
...  
Keyword(s):  
Uv Radiation ◽  
Solar Uv Radiation ◽  
Solar Uv ◽  
Effective Doses

Effects of solar UV radiation on germination of conchospores and morphogenesis of sporelings in Porphyra haitanensis (Rhodophyta)

2007 ◽  
Vol 151 (5) ◽  
pp. 1751-1759 ◽  
Author(s):  
Hongxia Jiang ◽  
Kunshan Gao ◽  
E. Walter Helbling
Keyword(s):  
Uv Radiation ◽  
Porphyra Haitanensis ◽  
Solar Uv Radiation ◽  
Solar Uv

Solar UV radiation variations and their stratospheric and climatic effects

1985 ◽  
Vol 5 (6) ◽  
pp. 145-148 ◽  
Author(s):  
Richard F. Donnelly ◽  
Donald F. Heath
Keyword(s):  
Uv Radiation ◽  
Climatic Effects ◽  
Solar Uv Radiation ◽  
Solar Uv

scholarly journals Interaction between variable solar UV radiation and tropospheric circulations as a possible cause of five year oscillation in Earth rotation

2000 ◽  
pp. 51-56
Author(s):  
P. Jovanovic ◽  
D. Djurovic
Keyword(s):  
Uv Radiation ◽  
Earth Rotation ◽  
Solar Uv Radiation ◽  
Solar Uv ◽  
Possible Cause

It is shown that Five Year Oscillation in Earth rotation is possibly caused by variable solar UV radiation and a corresponding perturbation mechanism is suggested.

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