Spectrophotometer

Reference Designator
CE04OSSM-RID27-01-OPTAAD000
Start Depth
7
End Depth
7
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/CE04OSSM/RID27/01-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 OC1503D 04/07/2015 05/09/2016 CGMCE-04OSSM-00003 CGINS-OPTAAD-00183 44.3667 -124.945 7 587
2 Review TN-342 05/16/2016 10/01/2016 CGMCE-04OSSM-00002 CGINS-OPTAAD-00261 44.3648 -124.943 7 587
3 Review AT37-03 10/01/2016 04/21/2017 CGMCE-04OSSM-00003 CGINS-OPTAAD-00258 44.3811 -124.956 7 585
4 Review SKQ201704S 04/21/2017 10/13/2017 CGMCE-04OSSM-00004 CGINS-OPTAAD-00179 44.3656 -124.941 7 574
5 Review SKQ201715S 10/11/2017 04/03/2018 CGMCE-04OSSM-00005 CGINS-OPTAAD-00174 44.3818 -124.95 7 575
7 Review SR1813 09/27/2018 04/20/2019 CGMCE-04OSSM-00007 CGINS-OPTAAD-00136 44.38 -124.95 7 575
8 Review SKQ201910S 04/20/2019 10/21/2019 CGMCE-04OSSM-00008 CGINS-OPTAAD-00208 44.3645 -124.94 7 575
9 Review SKQ201921S 10/21/2019 CGMCE-04OSSM-00009 CGINS-OPTAAD-00260 44.378 -124.946 7 575
Metadata Start Date End Date Comment
CE04OSSM-RID27-01-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

CE04OSSM-RID27-01-OPTAAD000

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

By Lori Garzio, on 6/28/19

CE04OSSM-RID27-01-OPTAAD000

42%-57% of the optical_absorption values for deployments 2-4 are nans, fill values, outside of global ranges, or outliers (+/- 5 SD).

By Lori Garzio, on 6/28/19

CE04OSSM-RID27-01-OPTAAD000
Deployment: 1

61%-70% of the beam_attenuation and optical_absorption values for this deployment are nans, fill values, outside of global ranges, or outliers (+/- 5 SD).

By Lori Garzio, on 6/28/19

New Note

Metadata Start Date End Date Comment
CE04OSSM-RID27-01-OPTAAD000
4/7/15, 7:00 PM

Per vendor feedback, the first 1-2 min of each OPTAA 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. Users are encouraged to delete the first minute of data, at a minimum, from each measurement burst and then calculate a median average of the remaining data from the burst before working further with the OPTAA data.

Id: 2097 By: wingardc

CE04OSSM-RID27-01-OPTAAD000
4/20/19, 4:13 PM 10/21/19, 5:56 PM

Immediately after deployment, power to the instrument indicated a short to seawater. Either the instrument has flooded or the cable(s) to the instrument or external pump have failed. No further data will be available from this instrument for this time period.

Id: 1683 By: wingardc
Flag: not_operational Exclude: No

CE04OSSM-RID27-01-OPTAAD000
10/21/19, 2:30 PM

The OPTAA burst duration was changed from 2 minutes to 4 minutes beginning 2019-10-21T18:30:00 UTC.

Id: 1872 By: wingardc

CE04OSSM-RID27-01-OPTAAD000
Method: telemetered
3/27/20, 2:35 PM

Due to a change in the program telemetry systems, data from this sensor will not be telemetered to shore. The data is still being collected and will be available upon mooring recovery.

Id: 2066 By: wingardc
Flag: not_available Exclude: No

CE04OSSM
Method: telemetered
5/6/20, 10:40 PM 5/11/20, 8:00 PM

Due to a bug in the mooring telemetry system, data during this time range was not telemetered to shore. It was recorded on the mooring and instruments and will be available in the recovered data streams.

Id: 2181 By: wingardc
Flag: not_available Exclude: No