Fróðskaparrit - 01.01.2009, Page 164

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CHEMICAL SEDIMENT VARIABLES FROM THE FAROE AREA:
ORCANIC CONTENT, NITROCEN, PHOSPHORUS, ZINC, AND COPPER
Depth LOI % Total-N g/kg Total-P g/kg Total-N/LOI g/g Total-P/LOI g/g Zinc mg/kg C opper mg/kg Zinc/LOI mg/g Copper/LOI mg/g
0-79 m
Min 3.0 7.30 0.74 0.024 0.075 35 33 0.7 0.7
Max 7.5 7.90 7.30 0.033 0.024 96 99 7.7 7.9
Mean 4.8 7.48 7.03 0.028 0.079 59 62 7.3 1.4
Std. dev. 7.7 0.23 0.22 0.004 0.003 77 77 0.3 0.4
n 77 6 6 6 6 74 74 14 14
20-39 m
Min 7.5 0.74 0.43 0.007 0.007 72 74 0.3 0.3
Max 73.0 4.07 2.02 0.043 0.059 88 720 3.9 3.6
Mean 5.3 7.47 0.98 0.026 0.022 52 60 7.7 7.3
Std. dev. 2.2 0.79 0.33 0.009 0.070 73 78 0.5 0.7
n 89 38 38 38 38 89 89 89 89
40-59 m
Min 0.5 0.97 0.60 0.077 0.070 29 36 0.6 0.6
Max 77.7 3.20 7.30 0.324 0.770 74 88 8.6 72.0
Mean 5.8 7.97 0.88 0.042 0.027 57 62 7.7 7.3
Std. dev. 7.9 0.53 0.78 0.059 0.037 70 74 7.7 7.5
n 56 25 25 25 25 53 53 53 53
60-82 m
Min 4.8 7.37 0.67 0.024 0.07 7 47 48 0.6 0.8
Max 8.4 2.27 0.96 0.037 0.074 49 68 0.9 7.2
Mean 6.3 7.77 0.80 0.027 0.073 45 67 0.7 7.0
Std. dev. 7.9 0.49 0.75 0.004 0.007 4 77 0.7 0.2
n 3 3 3 3 3 3 3 3 3
No depth info
Min 7.4 0.77 0.70 0.002 0.002 28 35 0.5 0.6
Max 70.4 7.94 7.62 0.058 0.033 98 100 6.0 7.3
Mean 5.5 7.02 0.79 0.024 0.020 55 60 7.7 7.2
S td. dev. 2.0 0.59 0.30 0.074 0.008 74 16 0.7 0.9
n 64 79 79 79 79 55 56 55 56
All samples
Min 0.5 0.74 0.43 0.007 0.007 72 14 0.3 0.3
Max 73.0 4.07 2.02 0.324 0.770 98 720 8.6 72.0
Mean 5.4 7.49 0.92 0.037 0.027 53 67 7.7 7.3
Std. dev. 2.0 0.70 0.27 0.032 0.078 73 17 0.8 7.0
n 229 97 97 97 97 274 215 214 275
Table 7. Loss on ignicion (LOI), total nitrogen (Total-N), total phosphorus (Total-P), zincandcopperorganized by
depth intervals. A total of 229 samples were analyzed. n = number of samples.
phorus ±15 %, zinc ±10 %, copper ±10 %.
Generally, depth was obtained by echo
sounder. In only a very few cases was depth
measured directly or estimated from depth-
contour maps.
Results
Table 1 and 2 show a total of 229 sediment
samples from inshore waters in the Faroe ls-
lands, sampled in the period 1999-2008 by
KMBL. Figure 1 shows the sampled locations.
All samples are in the depth range 2-82 m
and represent all types of seabed sediments.