Spectrophotometer

Reference Designator
GA01SUMO-SBD12-01-OPTAAD000
Start Depth
1
End Depth
1
Location
Bottom of Buoy
Current Status
Review Complete
Class
OPTAA (Absorption Spectrophotometer)
Series
OPTAA-D
Science Discipline
Biological
Make
WET Labs
Model
AC-S
M2M Example
https://ooinet.oceanobservatories.org/api/m2m/12576/sensor/inv/GA01SUMO/SBD12/01-OPTAAD000/metadata
Method Data Stream Content Type
recovered_host optaa_dj_dcl_instrument_recovered Data Products Report M2M Stats Science
recovered_host optaa_dj_dcl_metadata_recovered Metadata Report M2M Engineering
telemetered optaa_dj_dcl_instrument Data Products Report M2M Stats Science
telemetered optaa_dj_dcl_metadata Metadata Report M2M Engineering
Deployment Cruise Start Date Stop Date Mooring Asset Node Asset Sensor Asset Latitude Longitude Deployment Depth Water Depth
1 Review AT-26-30 03/15/2015 11/26/2015 CGMGA-01SUMO-00001 CGINS-OPTAAD-00207 -42.9228 -42.4393 1 5161
2 Review NBP-15-10 11/14/2015 11/08/2016 CGMGA-01SUMO-00002 CGINS-OPTAAD-00245 -42.9246 -42.5867 1 5188
3 Review NBP16-09 10/27/2016 01/14/2018 CGMGA-01SUMO-00003 CGINS-OPTAAD-00187 -42.9204 -42.4409 1 5175
Metadata Start Date End Date Comment
GA01SUMO-SBD12-01-OPTAAD000

According to Roesler and Barnard (Optical proxy for phytoplankton biomass in the absence of photophysiology: Rethinking the absorption line height, Methods in Oceanography, 2013), “absorption meters are highly prone to biofouling, particularly biofilms which not only attenuate the collimated beam but also impact the scattering properties of the optical surfaces and tubes. In productive coastal waters biofouling can have significant impacts (i.e. 10% of the signal) within one to two weeks”.

By Lori Garzio, on 6/27/19

New Note

Metadata Start Date End Date Comment
GA01SUMO-SBD12-01-OPTAAD000
Stream: optaa_dj_dcl_instrument
3/15/15, 5:25 PM

Per vendor feedback, the first 1-2 min of each AC-S instrument sampling period should be considered suspect. Signal drift can occur as the instrument warms up, flushes with seawater, and the filter wheel spins up.

Id: 1795 By: swhite

GA01SUMO-SBD12-01-OPTAAD000
Stream: optaa_dj_dcl_instrument_recovered
3/15/15, 5:25 PM

Per vendor feedback, the first 1-2 min of each AC-S instrument sampling period should be considered suspect. Signal drift can occur as the instrument warms up, flushes with seawater, and the filter wheel spins up.

Id: 1796 By: swhite

GA01SUMO
3/15/15, 5:25 PM 11/26/15, 5:08 AM

Deployment 1: Buoy log files showed that seawater was first detected inside the buoy well on 3/26/2015. Both leak detectors showed increasing presence of water over the period of deployment. Upon recovery of the mooring, no external damage was visible and the buoy did not appear to be floating lower than normal.

Id: 653 By: lgarzio

GA01SUMO-SBD12
3/15/15, 5:25 PM 11/26/15, 5:08 AM

Deployment 1: Upon recovery, the bottom of the buoy was heavily biofouled with gooseneck barnacles. The barnacle coverage likely caused imporper sea water flushing at the location of the intakes and sensor faces for the subsurface instruments.

Id: 655 By: lgarzio

GA01SUMO-SBD12-01-OPTAAD000
3/15/15, 5:25 PM 11/26/15, 5:08 AM

Deployment 1: The intake plumbing was torn from the weight of attached barnacles.

Id: 657 By: lgarzio

GA01SUMO-SBD12
11/14/15, 4:06 PM 11/8/16, 5:10 AM

Deployment 2: Upon recovery, the bottom of the buoy was heavily biofouled with barnacles.

Id: 664 By: lgarzio

GA01SUMO-SBD12
10/26/16, 9:47 PM 1/14/18, 5:24 AM

Deployment 3: Upon recovery, the bottom of the buoy was heavily biofouled.

Id: 386 By: lgarzio