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Data Notices

Sept. 23, 2016:  Revision of SATURN-03 Nitrate QC between 3/4/15 & 5/18/16

Additional nutrient sample data were used to finalize preliminary offset corrections applied to SATURN-03 nitrate data between 3/4/15 amd 5/18/16.  Preliminary corrections were released in March-May 2016.  The revised estimates of sensor offset were greater by ~0-4uM during some periods of sensor deployment.  For details see  http://www.stccmop.org/files/s3nitrate_mar2015-may2016_0.pdf

Aug 11, 2016: Revised Calibrations Applied to SATURN-04 Chlorophyll

The calibrations based on extracted chlorophyll measurements that are applied to raw data have been revised.  The revisions include the inclusion of additional sample data and correcting the calibration regressions to fit sensor output as the dependent variable.  The newly applied calibrations resulted in small changes the final chlorophyll values.  Greater than 99% of the changes were within +/- 2 ug/L.  Details of the original and updated calibrations are available in the QA/QC supporting documentation:  http://www.stccmop.org/books/qaqc_chlorophyll  and an overview of changes are sumarized here.

Aug 5, 2016: Revised Calibrations Applied to SATURN-03 Chlorophyll

The calibrations based on extracted chlorophyll measurements that are applied to raw data have been revised.  The revisions include re-grouping the sample data by year as well as correcting the regressions to fit sensor output as the dependent variable.  The newly applied calibrations typically result in higher values for chlorophyll concentration.  While the majority of changes were within +/- 2 ug/L, increases at the highest chlorophyll values were greater than 20%.  Details of the original and updated calibrations are available in the QA/QC supporting documentation:  http://www.stccmop.org/books/qaqc_chlorophyll  and an overview of changes are sumarized here.

Jun 17, 2016: Turbidity and Chlorophyll Clear Water Offsets

Turbidity and chlorophyll offsets, based on measured values in de-ionized water in-situ and pre-deployment, have been applied in the PD1 data for current deployments at SATURN-03, SATURN-04, SATURN-07 and SATURN-09.

March 3, 2016: Turbidity data correction

Turbidity data from Cyclops sensors was incorrectly scaled by a factor of 6 prior to March 3rd, 2016. Historical data has been rescaled to the correct scale. This change has resulted in a larger baseline offset which has been adjusted for in the PD2 data. Turbidity data from FLNTU and Multi-exciter instruments did not require rescaling and has not been changed.