Spectrophotometer

Reference Designator
GS01SUMO-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: 6/26/19, 5:33 PM

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 313 125 0 0 5 191 471,350 12 / 1 2 3 Complete
2 recovered_host / 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: 12
40%

Lat/Lon Differences (km)

Deployment: 12
1 0.00

System Annotations

Metadata Start Date End Date Comment
GS01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument
2/18/15, 4:06 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: 1805 By: swhite

GS01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument_recovered
2/18/15, 4:06 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: 1806 By: swhite

GS01SUMO
12/8/17, 7:00 PM 12/8/18, 11:42 PM

Deployment 3: *UPDATED 2020-04-28: This mooring was recovered 2018-12-09 which was a year later than originally intended. Some instruments were able to continue sampling for the extended deployment.* Recovery of the mooring was planned during the NBP 17-09 cruise (Nov - Dec 2017) but not completed due to adverse weather conditions. Recovery options are pending. Instruments that are still operational are likely reaching (or have surpassed) their deployment lifespan.

Id: 834 By: lgarzio

GS01SUMO-RID16
2/3/19, 1:00 PM 2/11/19, 7:00 AM

Deployment 4: The NSIF experienced power failure on 2/3/19 1800UTC and power was restored on 2/11/19 1200UTC. All NSIF instruments will have this gap in their telemetered data.

Id: 1577 By: cdobson

GS01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument
9/25/19, 9:00 AM

The OPTAA burst duration was changed from 2 minutes to 4 minutes as of the start date/time of this annotation (during Deployment 4).

Id: 1863 By: swhite

GS01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument_recovered
9/25/19, 9:00 AM

The OPTAA burst duration was changed from 2 minutes to 4 minutes as of the start date/time of this annotation (during Deployment 4).

Id: 1864 By: swhite

Review Notes

Metadata Start Date End Date Comment
GS01SUMO-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 6/28/19

GS01SUMO-RID16-01-OPTAAD000
Deployment: 1

30% of the beam_attenuation values for this deployment are either fill values or outliers (+/- 5 SD), and 77% of optical_absorption values are fill values, outside of global ranges, or outliers.

By Lori Garzio, on 6/28/19

GS01SUMO-RID16-01-OPTAAD000
Deployment: 2

In one of the deployment 2 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

GS01SUMO
Deployment: 3

Annotation ID 834 needs to be updated: "Deployment 3: Recovery of the mooring was planned during the NBP 17-09 cruise (Nov - Dec 2017) but not completed due to adverse weather conditions. Recovery options are pending. Instruments that are still operational are likely reaching (or have surpassed) their deployment lifespan."

By Lori Garzio, on 1/14/19

New Note