scholarly journals Effect of aerosols on solar UV irradiances during the Photochemical Activity and Solar Ultraviolet Radiation campaign

1998 ◽  
Vol 103 (D20) ◽  
pp. 26051-26060 ◽  
Author(s):  
A. Kylling ◽  
A. F. Bais ◽  
M. Blumthaler ◽  
J. Schreder ◽  
C. S. Zerefos ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Photochemical Activity ◽  
Solar Ultraviolet Radiation ◽  
Solar Uv ◽  
Solar Ultraviolet

scholarly journals Episode of unusual high solar ultraviolet radiation in central Europe due to dynamical reduced stratospheric ozone in May 2005

2005 ◽  
Vol 5 (5) ◽  
pp. 10409-10420 ◽  
Author(s):  
C. Stick ◽  
K. Krüger ◽  
N. H. Schade ◽  
H. Sandmann ◽  
A. Macke
Keyword(s):  
Ultraviolet Radiation ◽  
Uv Radiation ◽  
Stratospheric Ozone ◽  
Solar Ultraviolet Radiation ◽  
Solar Uv ◽  
Resultant Increase ◽  
The Tropics ◽  
Effective Radiation ◽  
Ozone Episodes ◽  
Solar Ultraviolet

Abstract. In late May this year unusual high levels of solar ultraviolet radiation were observed in Europe. In Northern Germany the measured irradiance of erythemally effective radiation exceeded the climatological mean by more than about 20%. An extreme low ozone event for the season coincided with the high solar elevation angles during late spring leading to the highest value of erythemal UV-radiation ever observed at this location in May. This ''ozone mini-hole'' was caused by an elevation of tropopause height accompanied with a poleward advection of natural low total ozone from the tropics. The resultant increase in UV-radiation is of particular significance for human health. Dynamically induced low ozone episodes that happen around the summer solstice can considerably enhance the solar UV-radiation in the mid latitudes and therefore contribute to the UV-burden of people living in the mid latitudes.

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.

scholarly journals Episode of unusual high solar ultraviolet radiation over central Europe due to dynamical reduced total ozone in May 2005

2006 ◽  
Vol 6 (7) ◽  
pp. 1771-1776 ◽  
Author(s):  
C. Stick ◽  
K. Krüger ◽  
N. H. Schade ◽  
H. Sandmann ◽  
A. Macke
Keyword(s):  
Ultraviolet Radiation ◽  
Central Europe ◽  
Uv Radiation ◽  
Solar Ultraviolet Radiation ◽  
Solar Uv ◽  
The Tropics ◽  
Sky Conditions ◽  
Effective Radiation ◽  
Ozone Episodes ◽  
Solar Ultraviolet

Abstract. In late May 2005 unusual high levels of solar ultraviolet radiation were observed over central Europe. In Northern Germany the measured irradiance of erythemally effective radiation exceeded the climatological mean by more than about 20%. An extreme low ozone event for the season coincided with high solar elevation angles and high pressure induced clear sky conditions leading to the highest value of erythemal UV-radiation ever observed over this location in May since 1994. This hereafter called "ozone mini-hole" was caused by an elevation of tropopause height accompanied with a poleward advection of ozone-poor air from the tropics. The resultant increase in UV-radiation is of particular significance for human health. Dynamically induced low ozone episodes that happen in late spring can considerably enhance the solar UV-radiation in mid latitudes and therefore contribute to the UV-burden of people living in these regions.

scholarly journals Effect of solar ultraviolet radiation exposure on serum 25(OH)D concentration: a pilot randomised controlled trial

2018 ◽  
Vol 17 (5) ◽  
pp. 570-577 ◽  
Author(s):  
Shanchita R. Khan ◽  
David C. Whiteman ◽  
Michael G. Kimlin ◽  
Monika Janda ◽  
Michael W. Clarke ◽  
...  
Keyword(s):  
Randomised Controlled Trial ◽  
Ultraviolet Radiation ◽  
Controlled Trial ◽  
Pilot Trial ◽  
Solar Ultraviolet Radiation ◽  
Pilot Randomised Controlled Trial ◽  
Ultraviolet Radiation Exposure ◽  
Solar Uv ◽  
Randomised Controlled ◽  
Solar Ultraviolet

A pilot trial investigated the change in serum 25(OH)D concentration induced by deliberate exposure to one SED of solar UV radiation. This will inform the methods of a fully powered trial.

Simplified Calibration for Broadband Solar Ultraviolet Radiation Measurements¶

2003 ◽  
Vol 78 (6) ◽  
pp. 603 ◽  
Author(s):  
A. Oppenrieder ◽  
P. Hoeppe ◽  
P. Koepke ◽  
J. Reuder ◽  
J. Schween ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Solar Ultraviolet Radiation ◽  
Solar Ultraviolet ◽  
Radiation Measurements
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