A new parameterization of the UV irradiance altitude dependence for clear-sky conditions and its application in the on-line UV tool over Northern Eurasiaстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 28 октября 2016 г.
Аннотация:A new method for calculating the altitude UV
dependence is proposed for different types of biologically
active UV radiation (erythemally weighted, vitamin-
D-weighted and cataract-weighted types). We show that for
the specified groups of parameters the altitude UV amplification
(AUV/ can be presented as a composite of independent
contributions of UV amplification from different factors
within a wide range of their changes with mean uncertainty
of 1% and standard deviation of 3% compared with the exact
model simulations with the same input parameters. The
parameterization takes into account for the altitude dependence
of molecular number density, ozone content, aerosol
and spatial surface albedo. We also provide generalized altitude
dependencies of the parameters for evaluating the AUV.
The resulting comparison of the altitude UV effects using
the proposed method shows a good agreement with the accurate
8-stream DISORT model simulations with correlation
coefficient r >0.996. A satisfactory agreement was also obtained
with the experimental UV data in mountain regions.
Using this parameterization we analyzed the role of different
geophysical parameters in UV variations with altitude.
The decrease in molecular number density, especially at high
altitudes, and the increase in surface albedo play the most
significant role in the UV growth. Typical aerosol and ozone
altitude UV effects do not exceed 10–20 %. Using the proposed
parameterization implemented in the on-line UV tool
(http://momsu.ru/uv/) for Northern Eurasia over the PEEX
domain we analyzed the altitude UV increase and its possible
effects on human health considering different skin types
and various open body fraction for January and April conditions
in the Alpine region.