Dissolved Oxygen

Reference Designator
GA01SUMO-SBD11-04-DOSTAD000
Start Depth
1
End Depth
1
Location
Bottom of Buoy
Current Status
Review Complete
Class
DOSTA (Dissolved Oxygen Stable Response)
Series
DOSTA-D
Science Discipline
Chemical
Make
Aanderaa
Model
Optode 4831
M2M Example
https://ooinet.oceanobservatories.org/api/m2m/12576/sensor/inv/GA01SUMO/SBD11/04-DOSTAD000/metadata
Method Data Stream Content Type
recovered_host dosta_abcdjm_dcl_instrument_recovered Data Products Report M2M Stats Science
telemetered dosta_abcdjm_dcl_instrument Data Products Report M2M Stats Science
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-DOSTAD-00226 -42.9228 -42.4393 1 5161
2 Review NBP-15-10 11/14/2015 11/08/2016 CGMGA-01SUMO-00002 CGINS-DOSTAD-00461 -42.9246 -42.5867 1 5188
3 Review NBP16-09 10/27/2016 01/14/2018 CGMGA-01SUMO-00003 CGINS-DOSTAD-00379 -42.9204 -42.4409 1 5175
Metadata Start Date End Date Comment
GA01SUMO-SBD11-04-DOSTAD000

Deployments 2 and 3: Dissolved oxygen concentrations in the beginning of both deployments seem reasonable, then quickly decline. It appears that the biofouling of the surface buoy negatively impacted the quality of the data for both deployments. I compared the instrument data to shipboard data from D0002 (nbp1510_010.cnv) and R0003 (at3903007.cnv). The shipboard CTD data are not available for the GA3 cruise - R0002 and D0003 (these files should be uploaded to alfresco). From the comparisons I was able to do, it appears that the instrument was recording values within a reasonable range at the beginning of the deployment, and unreasonably low values at the end of the deployment (compared to the shipboard CTD data). These data should be annotated as suspect.

By Lori Garzio, on 2/22/19

GA01SUMO-SBD11-04-DOSTAD000
Deployment: 2
2/1/16, 12:00 AM 11/8/16, 10:10 AM

Data are unreasonable, likely due to biofouling (see other note).

By Lori Garzio, on 2/22/19

GA01SUMO-SBD11-04-DOSTAD000
Deployment: 3
10/27/16, 1:47 AM 1/14/18, 10:24 AM

Data are unreasonable, likely due to biofouling (see other note).

By Lori Garzio, on 2/22/19

New Note

Metadata Start Date End Date Comment
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-SBD11
3/15/15, 5:25 PM 11/26/15, 5:08 AM

Deployment 1: Upon recovery, the bottom of the buoy was heavily biofouled with gooseneck barnacles. The barnacle coverage likely caused imporper sea water flushing at the location of the intakes and sensor faces for the subsurface instruments.

Id: 654 By: lgarzio

GA01SUMO-SBD11-04-DOSTAD000
3/15/15, 5:25 PM 11/26/15, 5:08 AM

Deployment 1: A gooseneck barnacle was attached to the sensor membrane at recovery.

Id: 656 By: lgarzio

GA01SUMO-SBD11
11/14/15, 4:06 PM 11/8/16, 5:10 AM

Deployment 2: Upon recovery, the bottom of the buoy was heavily biofouled with barnacles.

Id: 663 By: lgarzio

GA01SUMO-SBD11
10/26/16, 9:47 PM 1/14/18, 5:24 AM

Deployment 3: Upon recovery, the bottom of the buoy was heavily biofouled.

Id: 385 By: lgarzio