Náttúrufræðingurinn - 2013, Blaðsíða 49

157
Tímarit Hins íslenska náttúrufræðifélags
exist. Comparison between the Ice-
landic health limit and the WHO guide-
line may not be very useful because the
Icelandic health limit is based on the
long term public health effects of H2S,
but the WHO guideline is based on ad-
verse effects. Occupational exposure
standards and limits, the maximum
concentration of a pollutant in the work
environment, both in Iceland and
Europe, are close to concentrations con-
sidered harmful to human health, an
indication that they should be studied
further. Concentrations of hydrogen
sulfide in the capital city area, measured
at Grensásvegur (GRE) in Reykjavík
and Hvaleyrarholt (HEH) in Hafnar-
fjörður, exceeded the health limit value
for 19 hours at GRE (all in 2010), but
never at HEH in 2010–2012. The concen-
tration would be over the health limit
value for 1000±280 hours per year (on
average for 2010–2012) if the reference
value is 10 µg/m3. The concentration
measured at both stations shows a
strong seasonal signal where H2S, is
lower in the summer than in winter,
probably because of higher probability
of an inversion during winter.
Þakkir
Árið 2010 tóku þátt í talningunum þau Snævarr Örn Georgsson, Þórey
Ketilsdóttir, Þorlákur Snær Helgason, Hörður Ólafsson og Ólafur Larsen.
Lovísa Ásbjörnsdóttir vann kortin. Er aðstoð þeirra kærlega þökkuð.
Ritrýnar Náttúrufræðingsins fá þakkir fyrir góðar ábendingar.
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