Spectrophotometer

Reference Designator
GA01SUMO-RID16-01-OPTAAD000
Start Depth
12
End Depth
12
Location
Near Surface Instrument Frame
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/RID16/01-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-00209 -42.9228 -42.4393 12 5161
2 Review NBP-15-10 11/14/2015 11/08/2016 CGMGA-01SUMO-00002 CGINS-OPTAAD-00218 -42.9246 -42.5867 12 5188
3 Review NBP16-09 10/27/2016 01/14/2018 CGMGA-01SUMO-00003 CGINS-OPTAAD-00193 -42.9204 -42.4409 12 5175
Metadata Start Date End Date Comment
GA01SUMO-RID16-01-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

GA01SUMO-RID16-01-OPTAAD000

There is no pressure variable in the .nc files. This should be a coordinate.

By Lori Garzio, on 6/27/19

GA01SUMO-RID16-01-OPTAAD000
Deployment: 1

In one of the deployment 1 recovered_host netcdf files (in the location attached), the wavelength dimension is an array of -9999999. The wavelength dimension in the other 2 files from that deployment is an index from 0-86.

By Lori Garzio, on 6/26/19

GA01SUMO-RID16-01-OPTAAD000
Deployment: 2

wavelength_a and wavelength_c are arrays of fill values for this deployment. These variables should contain the measurement wavelengths.

By Lori Garzio, on 6/27/19

GA01SUMO-RID16-01-OPTAAD000
Deployment: 3

Approximately 90% of the data for beam_attenuation and optical_absorption for this deployment are nans, fill values, outside of global ranges or outliers (+/- 5 SD)

By Lori Garzio, on 6/27/19

New Note

Metadata Start Date End Date Comment
GA01SUMO-RID16-01-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: 1797 By: swhite

GA01SUMO-RID16-01-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: 1798 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-RID16-01-OPTAAD000
3/15/15, 5:25 PM 11/26/15, 5:08 AM

Deployment 1: Upon recovery, both flow channels were detached from the unit (one was missing entirely).

Id: 659 By: lgarzio