Spectrophotometer

Reference Designator
GI01SUMO-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, 5:32 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 347 58 0 161 29 148 38,480 12 / 1 2 Complete
2 recovered_host 340 294 0 0 1 46 1,131,398 12 / 3 1 2 Complete
3 recovered_host 401 210 0 1 2 190 754,846 12 / 3 1 2 Complete
4 telemetered 314 69 0 244 0 0 672,017 12 / 4 4 2 Complete
Data Ranges Review Images

Test Notes

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

Data Coverage

Deployment: 1234
22%
17%86%52%

Lat/Lon Differences (km)

Deployment: 1234
1 0.00
2 5.690.00
3 0.376.040.00
4 1.395.601.390.00

System Annotations

Metadata Start Date End Date Comment
GI01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument
9/10/14, 2:50 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: 1801 By: swhite

GI01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument_recovered
9/10/14, 2:50 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: 1802 By: swhite

GI01SUMO-RID16-01-OPTAAD000
9/10/14, 2:50 PM 3/13/15, 12:01 PM

Deployment 1: At recovery, the Y-tubing, one of the inlet tubes, the cable to the pump, and half of the lower clamp were missing.

Id: 688 By: lgarzio

GI01SUMO
2/14/15, 7:00 PM 8/21/15, 8:00 PM

Deployment 1: Status data sent from the buoy included leak detects in the buoy well, drop in battery voltage, and loss of wind turbine input. Upon recovery, the buoy was primarily intact but several instruments were damaged and/or missing. Ice build-up on the tower is speculated to be the cause for much of the damage. No telemetered or recovered_host data expected. Functional instruments could continue to collect data using internal battery power and storage cards.

Id: 46 By: lgarzio

GI01SUMO
1/26/16, 7:00 PM 7/18/16, 8:00 PM

Deployment 2: A period of violent weather caused power outages on multiple instruments. No telemetered or recovered_host data expected. Functional instruments could continue to collect data using internal battery power and storage cards. Upon recovery, the buoy well was flooded.

Id: 47 By: lgarzio

GI01SUMO-RID16-01-OPTAAD000
7/10/16, 1:44 PM 8/14/17, 5:33 AM

Deployment 3: The pump cable was severed at recovery.

Id: 704 By: lgarzio

GI01SUMO
12/26/16, 7:00 PM 4/6/17, 8:00 PM

Deployment 3: Wind turbines were disabled due to evidence of ice build-up on the surface buoy tower. The platform's battery charge state declined steadily. As of 2017-01-15, all DCLs were shut down and the telemetry schedule was reduced to conserve power. Battery-powered instruments should continue to collect data. UPDATE 2017-04-07: With increasing daylight at this location, sufficient power was generated by solar panels to re-establish limited high-bandwidth telemetry and data transmission. UPDATE: at recovery, wind turbines were missing their hubs and blades, and one solar panel was missing.

Id: 121 By: lgarzio

GI01SUMO
8/5/17, 2:17 PM 6/14/18, 4:02 AM

Deployment 4: at 10:03 UTC on 12 October 2017 the Irminger Sea Surface Mooring stopped all communications. At recovery, the surface buoy was missing. The subsurface portion of the mooring had fallen to the seafloor and was recovered. CTDMOs, CTDBP-F, DOSTA, and ADCP instrumentation were full ocean depth rated and survived, although any recovered data available after 2017-10-12T10:03:00 are suspect. All other instrumentation imploded or flooded. The cause for the loss of the buoy is inconclusive.

Id: 102 By: lgarzio

GI01SUMO
6/19/19, 8:00 PM

Deployment 5: Battery voltage dropped below 24V. All DCLs were turned off. CPM1 was placed on a wake schedule. Data collection and telemetry will be irregular until voltage rebounds.

Id: 1625 By: cdobson

GI01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument
8/19/19, 6:00 PM 9/25/19, 8:00 AM

The OPTAA burst duration was changed from 2 minutes to 5 minutes during the time period of this annotation (during Deployment 6).

Id: 1857 By: swhite

GI01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument_recovered
8/19/19, 6:00 PM 9/25/19, 8:00 AM

The OPTAA burst duration was changed from 2 minutes to 5 minutes during the time period of this annotation (during Deployment 6).

Id: 1858 By: swhite

GI01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument
9/25/19, 8:00 AM

The OPTAA burst duration was changed from 5 minutes to 4 minutes as of the start date/time of this annotation (during Deployment 6).

Id: 1861 By: swhite

GI01SUMO-RID16-01-OPTAAD000
Stream: optaa_dj_dcl_instrument_recovered
9/25/19, 8:00 AM

The OPTAA burst duration was changed from 5 minutes to 4 minutes as of the start date/time of this annotation (during Deployment 6).

Id: 1862 By: swhite

GI01SUMO
Method: telemetered
10/21/19, 8:00 PM

Deployment 6: *UPDATED 2020-04-27: As of 2020-02-21 data for most instruments are being telemetered again (via Iridium). A gap in telemetered data is expected between 2019-10-22 and 2020-02-21 and will not be backfilled but these data will be available upon recovery.*Both fleet broadband units have failed and no more telemetered data is expected at this time. Instruments are believed to be operating as normal and their data will be available upon recovery.

Id: 1743 By: cdobson

Review Notes

Metadata Start Date End Date Comment
GI01SUMO-RID16-01-OPTAAD000

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

By Lori Garzio, on 6/27/19

GI01SUMO-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

GI01SUMO-RID16-01-OPTAAD000

The majority (75%-95%) of the beam_attenuation and optical_absorption data for deployments 1, 2 and 4 are nans, fill values, or outside of global ranges.

By Lori Garzio, on 6/27/19

GI01SUMO
Deployment: 4
10/12/17, 12:00 AM 6/14/18, 8:02 AM

The surface buoy detached from the mooring and the subsurface portion of the mooring fell to the seafloor (see annotation ID 102). Excluding all mooring data for this time range from final statistics.

By Lori Garzio, on 1/15/19

New Note