Fig. 1. Mercury concentration profiles
obtained during four samplings (December
1993, June 1993, December 1994, July 19(7) at
the buoy "ODAS Italia 1" (43°48.90' N
09°06.80' E)
Mercury in Sea Water
103
December 93
June 94
____ -o--t1
100
200
,
~
. * *
"
,
I'
.
500.
~
*
,
~
0.6 0.8 1.0
0.0 0.1 0.2 0.3 0..4 0..6
OOC~~.-~--~~--~
Hg (ng/L)
0..0. 0..2 0..4
A
I
T (OC)
13.0.
13.5
140.
14.5
13.0. 13.9 148 15.7 16.6 175
-- -- e--Sal (pm)
37.0. 37.5 38.0. 38.5 39.0 38.0 38.2 38.4 38.6 38.8 39.0.
- - - - x- - - - - -
December 94
July 97
o r--_-,---...... _,
500
0.10. 0..15
0..20.
0.0. 0..1 0..2 0.3 0..4 0..5 0.6 0..7 0..8
,
t
I
l
1
I
,
,
,
J
I
I
I
T (GC)
13.013.5140.14.515.0.15.616,0.16.5
13 14 15 16 17 18 192021 22
- - e - - - -
Sal (pm)
37.5
36.0
38.5
39.0. 37.5
38.0
38.5
39.0.
- - - - x- - - - - -
can be detected. Mercury concentration ranges
between 0.06 and 0.90 ngll, with a mean value of
0.22 ngll, for samples collected in December
1993, June 1993 and December 1994. Higher values have been found for the July 1997 samples
with values ranging from 0.27 to 0.61 ngfl with a
mean value of 0.41 ngll.
Oceanographic data (temperature and salinity) recorded during the various investigations at
the same location and time at which sea water