Sediment trap deployment summary from R/V Tangaroa cruise 61TG_3052 in the Southern Ocean in 1999 (SOIREE project)

<p>SOIREE Sediment Trap - Deployments<br />
<br />
<strong>SOIREE traps - logistics</strong><br />
(Nodder, Charette, Waite, Trull)<br />
<br />
Note this T1, T0 for Sediment Traps<br />
Day T1 = 0000 h NZST 10/02/99 + 24 hours to 0000 h NZST 11/02/99<br />
with the nominal start of SOIREE (T0) at 0000 h NZST 10/02/99;<br />
NZST = UTC + 12 hours<br />
<br />
<em>MULTI-trap dimensions:</em><br />
Length (L, m): 0.58 <em>Trap length with baffles inserted<br />
L without baffles: 0.525 m<br />
AR without baffles: 7.50<br />
Trap volume without baffles: 2.021 litres</em><br />
Inside diameter (Di, m): 0.07<br />
Outside diameter (Do, m): 0.08<br />
Aspect ratio (AR): 8.29<br />
Aspect ratio with salt (AR): 7.29 <em>Basal brine added to a height of 1-trap diameter (7 cm)</em><br />
Collection area (A, m2): 0.00385<br />
Trap volume (V, m3): 0.00223<br />
Trap volume (V, litres): 2.232<br />
Baffle length (Lb, m): 0.08<br />
Baffle diameter (Dib, m): 0.01<br />
Baffle aspect ratio (ARb): 5.77<br />
<br />
Note: traps were deployed with a 1-D high density brine solution<br />
(excess 50 ppt NaCl) which would alter trap AR<br />
<br />
<em>Flux calculations:</em><br />
Flux (mg/m2/d) = Wt sample/(trap collection area x days deployed)<br />
<br />
Wt sample = Wtfiltered - Wtblank<br />
<br />
<em>METHOD</em><br />
Free-floating arrays of baffled, cylindrical MULTI-sediment traps.<br />
Twelve traps deployed on each cross-frame, 9 back-filled with a 1-trap diameter thick (7 cm), 50ppt excess NaCl basal brine (50 g NaCl/l) and 3<br />
with polyacrylimide gels mounted on base<br />
<br />
For all deployments and all depths:<br />
traps 1-3 = gel samples (Anya Waite)<br />
traps 4-6 = POC/PN/13Corg or mass/PSi (Scott Nodder, Tom Trull)<br />
traps 7-9 = phytopigments (Scott Nodder)<br />
<br />
For all deployments and 100 m only: traps 10-12 = Th samples (Matt Charette)<br />
<br />
For all deployments and 300 m only: traps 10-12 = POC/PN samples (Scott Nodder)<br />
<br />
Refer to Nodder &amp; Waite in DSRII<br />
&nbsp;</p>