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A new actinic flux 4p-spectroradiometer：instrument design and application to clear sky and broken cloud conditions
actinic flux 4p-spectroradiometer clear sky broken cloud conditions
2009/3/11
A new 4p-spectroradiometer was developed for measuring actinic flux especially under cloudy conditions based on a fixed grating imaging spectrograph and a CCD-detector leading to a simultaneous measur...
The H Lyman-a actinic flux in the middle atmosphere
H Lyman-a actinic flux middle atmosphere
2009/3/10
The penetration of solar H Lyman-a radiation into the terrestrial middle atmosphere is studied in detail. The Lyman-a actinic flux is calculated with a Monte Carlo approach including multiple resonanc...
Actinic flux and photolysis in water droplets：Mie calculations and geometrical optics limit
Actinic flux photolysis water droplets Mie calculations geometrical optics limit
2009/3/9
Photolysis of water-soluble components inside cloud droplets by ultraviolet/visible radiation may play an important role in atmospheric chemistry. Two earlier studies have suggested that the actinic f...
Actinic flux and O1D photolysis frequencies retrieved from spectral measurements of irradiance at Thessaloniki，Greece
Actinic flux O1D photolysis frequencies irradiance Thessaloniki Greece
2009/3/9
The results of two methods retrieving actinic flux and ozone photolysis frequencies (JO1D), from measurements of irradiance with a Brewer MKIII spectroradiometer are investigated in this paper. The fi...
Spectral actinic flux in the lower troposphere: measurement and 1-D simulations for cloudless, broken cloud and overcast situations
Spectral actinic flux lower troposphere 1-D simulations broken cloud overcast situations
2009/2/12
In September 2002, the first INSPECTRO campaign to study the influence of clouds on the spectral actinic flux in the lower troposphere was carried out in East Anglia, England. Measurements of the acti...
Influence of clouds on the spectral actinic flux density in the lower troposphere (INSPECTRO): overview of the field campaigns
clouds spectral actinic flux lower troposphere field campaigns
2008/11/3
Ultraviolet radiation is the key factor driving tropospheric photochemistry. It is strongly modulated by clouds and aerosols. A quantitative understanding of the radiation field and its effect on phot...