<div><p>The CTD was allowed to debubble briefly just below the surface before paying out wire, but this was often insufficient to get out all bubbles, so upper ~15m of the downcasts are generally not good.</p>
<p>The transmissometer windows were wiped clean with distilled water before and after each cast, and kept capped in between deployments. The voltage of the transmissometer in air (Vair) and in the dark (Vdark) were read after each deployment to monitor drift, though beam attenuation reported here do not yet take shipboard baseline measurements into account, and use the calibrations of the transmissometer from the beginning of OC449-2 cruise.</p>
<p>See: "VIII. Protocols for Optics: Transmissometer and Scattering Sensors" in the Sampling and Sample-handling Protocols for GEOTRACES Cruises, Edited by the 2010 GEOTRACES Standards and Intercalibration Committee.</p></div>
CTD - Pump Seacat CTD - Up Casts
<div><p>CTD *Up cast* data from Lam SBE19plus (Seacat) attached to end of the MacLane pump line<br />
Note: These data not collected on R/V Islandia ISL0109 cruise</p>
<p>PI's Note (09 May 2011):<br />
In comparing my pump seacat CTD to the ship's CTD, I've discovered that the ship's CTD's fluorescence and beam attenuation are no good, at least for OC449-3. The ship's fluorometer was clearly just not working. The ship's transmissometer misbehaved in a more subtle manner--oceanographically consistent, but of a different pattern than my pump seacat data. I concluded that my pump seacat CTD's transmissometer is the "correct" one by comparing to discrete particulate carbon measurements on particles collected on my pumps. Both particulate carbon concentrations and beam attenuation from my pump seacat CTD show a minimum at 500m at OC449-3 station 3, whereas the ship's CTD shows an anomalous minimum in subsurface beam attenuation at station 2, which is not seem in the particulate carbon concentrations.</p></div>
CTD - Pump Seacat CTD - Up Casts
<div><p>SBE43 oxygen sensor was calibrated to 32 Winkler titrations conducted on first leg (OC449-2) by Taka Ito at stations 9,13,17,22.</p>
<p>See: "VIII. Protocols for Optics: Transmissometer and Scattering Sensors" in the Sampling and Sample-handling Protocols for GEOTRACES Cruises, Edited by the 2010 GEOTRACES Standards and Intercalibration Committee.</p>
<p>
BCO-DMO Processing Notes:<br />
- Awk written to reformat original .cnv files contributed by Phoebe Lam<br />
- AWK: SIRENA_CTD_Pump_2_BCODMO.awk</p></div>
3474
CTD - Pump Seacat CTD - Up Casts
2011-05-09T14:23:49-04:00
2011-05-09T14:23:49-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:3474
Upcast profiles from Seacat CTD on MacLane pump from R/V Oceanus cruises OC449-02, and OC449-03 in the Eastern Atlantic and Indian Oceans in 2008 (SIRENA project)
false
Lam, P. J. (2011) Upcast profiles from Seacat CTD on MacLane pump from R/V Oceanus cruises OC449-02, and OC449-03 in the Eastern Atlantic and Indian Oceans in 2008 (SIRENA project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 09 May 2011) Version Date 2011-05-09 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3474 [access date]
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