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atmospheric conditions for the other systems. The sensor collector transmits the
data to the computer. Data acquisition and transfer repeats every 10 min. The AWS
is designed for heavy weather conditions. Figure
11.1
shows the trends from year
2004 to 2008. Wind till 2009 data show that till 2009 prevailing wind direction was
North-Northeast (Fig.
11.2
).
Meteorological measurements at peak Moussala have been carried out at NIMH
station since 1932 with time resolution of 3 h. Data from both stations show close
correlation (see Section
11.4
).
UV-AB (280-400 nm) and UV-B (280-325 nm) sensors register the power of
the UV radiation, which is very important for day-time atmospheric chemistry. Five
video cameras watch the cloud system above the station.
Fig. 11.2
Wind rose 2004-2008 from BEO Moussala data
11.2.2 Atmospheric Gas Analysis System
Greenhouse and trace gases measurements, which are important for climate change
investigation, are performed by atmospheric gas analysing system (Table
11.2
),
(Figs.
11.3
,
11.4
, and
11.5
). BEO Moussala is regional GAW Station since 2009 and
provides data from the gas analysers and from the meteorological measurements
to WDCGG (
http://gaw.kishou.go.jp/wdcgg/
). First results of ozone data analyses
(Nojarov et al.,
2009
) were published showing a possible method for pollutants
tracking.
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