1 passive samplers on moorings at three deep-ocean sites royal netherlands institute for sea...
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Passive samplers on moorings at three deep-ocean sites
Royal Netherlands Institute for Sea Research
Kees Booij, Ronald van Bommel, Hendrik M. van Aken,
Hans van Haren, Geert-Jan Brummer,
Herman Ridderinkhof
2
75
0
30
60
45
-30
-45
-60
0 30 60 90 120 150 180-30-60-90-120-150
Irminger Sea
Canary Basin
Strait Mozambique
7
ACO U STIC RE LEAS ES
5200
6 M E TE R KETTIN G
611 kg
STRO O M M E TER AA NDERA A RCM 11 4460
STRO O M M E TER AA NDERA A RCM 11 3863
STRO O M M E TER AA NDERA A RCM 11 2364
BM TI 800/4000 + Long ranger BMT 1462
STRO O M M E TER VALEP ORT 1563
CRPCRP 1500/300 1662
STRO O M M E TER 3115AQ UA DO PP
10
0.0
0.2
0.4
0.6
0.8
1.0
1.2
4 5 6 7 8logKsw
reta
ined
PR
CPRCs
5.5 L d-1
3.2 L d-1
tN
N
k
0
s
e
ln
sswes VKkR
IS2003-0.3
11
42
8
1
16
0.0
0.2
0.4
0.6
0.8
1.0
1.2
4 5 6 7 8logKsw
reta
ined
PR
CEstimate Rs by curve fitting
ssw
s
0
s expVK
tRN
N
Foppe Smedes, RIKZ, NL
12
0
1
2
3
0 2 4 6 8 10
Rs (L/d)
0
1
2
3
4
0 2 4 6 8 10
Rs (L/d)
Irminger Sea
dept
h (k
m)
0
2
4
6
0 2 4 6 8 10
Rs (L/d)
Canary Basin
Strait Mozambique
PRC-based sampling rates
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Irminger Sea
Canary Basin
Strait Mozambique
hexachlorobenzene
0
1
2
3
0 20 40 60
C (pg/L)
dept
h (k
m)
01
234
56
0 20 40 60
C (pg/L)
0
1
2
3
0 20 40 60C (pg/L)
14
C (pg/L)
0
1
2
3
0 10 20 30
dept
h (k
m)
0
12
3
45
6
0 10 20 30
C (pg/L)
0
1
2
3
0 10 20 30C (pg/L)
Irminger Sea
Canary Basin
Strait Mozambique
4,4’-DDE
15
0
1
2
3
0 1 2
C (pg/L)
dept
h (k
m)
0
1
23
4
5
6
0 1 2
C (pg/L)
0
1
2
3
0 1 2
C (pg/L)
Irminger Sea
Canary Basin
Strait Mozambique
PCB153
16
0
1
2
3
4
0 200 400C (pg/L)
dept
h (k
m)
0
1
2
3
4
5
6
0 200 400
C (pg/L)
0
1
2
3
0 200 400
C (pg/L)
Irminger Sea
Canary Basin
Strait Mozambique
fluoranthene
17
Conclusions
• SPMDs can withstand > 1-y exposures in open ocean• sampling rates ~ 6 L/d (460 cm2 normalised)• extracted water volumes ~ 1 m3
• curve fitting of N/N0 vs Ksw reduces subjective judgement
• Irminger Sea : moderate increase of Cw with depth• Canary Basin: sharp decrease with depth• Str. Mozamb.: low Cw for HCB, DDE, PCB, PAH
• Pretty high PAH concentrations in Canary Basin and Irminger Sea