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OAS accession Detail for 0168767, meta_version: 1. Current meta_version is: 5
| accessions_id: |
0168767 | archive
|
| Title: |
Assessment of the suitability of Durafet-based sensors for pH measurement in dynamic estuarine environments (Delaware Bay) from 2016-05-09 to 2016-08-24 - Manuscript Data Set (NCEI accession 0168767) |
| Abstract: |
The suitability of the Honeywell Durafet to the measurement of pH in productive, high-fouling, and highly-turbid estuarine environments was investigated at the confluence of the Murderkill Estuary and Delaware Bay (Delaware, USA). Three different flow configurations of the SeapHOx sensor equipped with a Honeywell Durafet and its integrated internal (Ag/AgCl reference electrode containing a 4.5M KCl gel liquid junction) and external (solid-state chloride ion selective electrode, Cl-ISE) reference electrodes were deployed for four periods between April 2015 and September 2016. In this environment, the Honeywell Durafet proved capable of making high-resolution and high-frequency pH measurements on the total scale between pH 6.8 and 8.4. Natural pH fluctuations of >1 pH were routinely captured over a range of timescales. The sensor pH collected between May and August 2016 using the most refined SeapHOx configuration exhibited good agreement with multiple sets of independently measured reference pH values. When deployed in conjunction with rigorous discrete sampling and calibration schemes, the sensor pH had a root-mean squared error ranging between 0.011 and 0.036 pH across a wide range of salinity relative to both pH_T calculated from measured dissolved inorganic carbon and total alkalinity and pH_NBS measured with a glass electrode corrected to pH_T at in situ conditions. The present work demonstrates the viability of the Honeywell Durafet to the measurement of pH to within the weather-level precision defined by the Global Ocean Acidification Observing Network (GOA-ON, less than 0.02 pH) as a part of future estuarine CO2 chemistry studies undertaken in dynamic environments. |
| Date received: |
20171115 |
| Start date: |
20160509 |
| End date: |
20160824 |
| Seanames: |
Delaware Bay |
| West boundary: |
-75.39 |
| East boundary: |
-75.39 |
| North boundary: |
39.05 |
| South boundary: |
39.05 |
| Observation types: |
chemical, discrete sample, physical, surface measurements
|
| Instrument types: |
coulometer for DIC measurement, pH sensor, titrator
|
| Datatypes: |
DISSOLVED INORGANIC CARBON (DIC), pH, total alkalinity
|
| Submitter: |
Cai, Wei-Jun |
| Submitting institution: |
University of Delaware |
| Collecting institutions: |
University of Delaware |
| Contributing projects: |
|
| Platforms: |
Peirce (31PE) |
| Number of observations: |
387 |
| Supplementary information: |
|
| Availability date: |
|
| Metadata version: |
1 |
| Keydate: |
2017-11-28 14:59:19+00 |
| Editdate: |
2017-11-28 15:17:11+00 |