Spectrophotometer

Reference Designator
GA01SUMO-RID16-01-OPTAAD000
Review Status
Review Complete
Note
The OPTAA data were run through the automated QC tests, but were not reviewed visually. Plots are provided in the “Review Images” section only for wavelengths on/near 676nm (if the wavelengths are defined in the .nc files).
Depth
12m
Class
OPTAA (Absorption Spectrophotometer)
Make / Model
WET Labs / AC-S

Dataset Reviews Last processed:

QC Check Info
Dep. Preferred Method Stream DD FD SG EG Gaps GD TS Rate (s) Pressure Comp. Time Order Valid Data Missing Data Data Comp. Missing Coords. Review
1 recovered_host / Complete
2 recovered_host 361 361 0 0 0 0 1,436,076 12 / 1 2 3 Complete
3 recovered_host 445 441 0 0 7 9 1,722,250 12 / 1 2 3 Complete
Data Ranges Review Images

Test Notes

  1. pass unique test - ascending not tested
  2. no comparison: timestamps do not match
  3. missing: ['pressure']

Data Coverage

Deployment: 123
100%99%

Lat/Lon Differences (km)

Deployment: 123
2 0.00
3 11.910.00

System Annotations

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

Review Notes

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