Fróðskaparrit - 01.01.2009, Qupperneq 169

EVNAFRØÐILIGAR BLEYTBOTNSDÁTUR Á FØROYSKUM HAVØKI:
LÍVRUNNIÐ TILFAR, NITROGEN, FOSFOR, SINK OG KOPAR
167
Station LOI % 0 cm LOI % 1 cm LOI % 3 cm LOI % 5 cm
SKOS
02.04.7987 7 7.3 7 7.8 8.5 8.3
22.04.7987 72.8 13.8 9.4 8.4
06.05.7987 7 7.6 10.4 10.2 70.0
04.06.7987 70.2 7.6 6.9 7.0
78.06.7987 7 7.4 6.2 5.8 4.7
27.07.7987 73.6 72.5 9.7 8.6
SK07
02.04.1987 72.2 77.7 70.9 70.9
22.04.7987 12.0 9.8 70.7 70.4
06.05.7987 7 7.6 70.4 70.2 70.0
27.07.7987 9.7 70.3 10.8 9.5
Table 4. LOI (%) of sediments from Skálafjørður in
1987. Data from Gaard (1990).
ports that contain data about marine sedi-
ment chemical variables from the Faroe area
(LOI, total nitrogen, total phosphorus, zinc
and copper). Four of the reports are from
offshore locations (Grøsvik et al„ 2000; Josef-
son, 2001; Mannvik and Petersen, 2002; Kald-
bak Marine Biological Laboratory, 2006) and
another four reports deal with data from in-
shore locations (Bloch et al„ 1986; Gaard,
1990; Hoydal and Dam, 2004; Johansen,
2006).
Bloch et al. (1986) gave single sample
LOI values from most Faroese fjords (Fig. 5).
They used 0.1 m2 van Veen-type grabs for
sampling, but gave no descriptive informa-
tion about the samples. A single sample was
taken at each station. At four stations, sam-
ples were collected more than once a year.
Gaard (1990) sampled two localities in
Skálafjørður (Fig. 6). Samples were taken at
station SK05, which at 67 meters is the deep-
est part of the fjord, and at SK07, which has
a depth of about 57 meters. At station SK05,
six samples were taken in the period April to
July (1987) and four samples were taken in
the same period at station SK07. A single
sample was taken at each station each time
and LOI was measured at depths 0, 1, 3 and
5 cm into the sediment.
The sediment type is silty clay (Gaard,
pers. comm.) and Gaard (1990) used a 14 cm
wide HAPS corer to obtain the samples. LOI
values were found by combusting dry sedi-
ment for 3 hours at 450 °C.
Hoydal and Dam (2004) gave data
from five Faroese fjords (Fig. 7), Skálafjørður
(SK), Funningsfjørður (FU), Kaldbaksfjørður
(KA), Kollafjørður (KO) and Sundini (SU).
Table 6 contains information on LOI and
copper from 2000, 2001 and 2003 and Table
5 contains information on LOI, total nitro-
LOt Cu
%wg/kg
SKO 5 (1) 9.0 7 70.5
SKOS (2) 8.4 70.1
SKOS (3) 8.8 7 70.9
SK0 7 10.7 115.9
SK09 71.8 96.6
KAOS 9.1 102.8
KA0S 9.7 97.3
KA09 7.6 106.4
KOO 7 6.6 93.1
SUOS 5.7 78.1
SU1S 6.8 89.3
SUIS 6.8 92.8
SU37 6.9 93.2
SU4 7 6.4 86.4
FU13 3.7 76.5
FU17 (1) 4.4 81.8
FU17 (2) 3.3 65.4
FU21 (1) 5.9 98.4
FU21 (2) 6.8 705.8
FU21 (3) 5.7 97.9
Table 5. LOI and copper values in sediments from
Faroese fjords in 1997. Numbers in brackets are
replicated samples. Data from Hoydal and Dam (2004).