Dataset: pH Time Series

Name: pH measurements collected at the height of El Niño at Jarvis Island in 2015 and 2016
Published: 2019-10-01
Keywords: coral bleaching, coral mortality, Jarvis Island, central equatorial Pacific, El Nino, sclerochronology, upwelling, oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.775838.1

Spatial Extent: N:-0.369 E:-159.98 S:-0.372 W:-160.008

Temporal Extent: 2015-11-12 - 2016-05-23

Project:

Skeletal Records of Coral Reef Bleaching in the Central Equatorial Pacific (Coral Bleaching Skeletal Records)

Principal Investigator:

Anne L. Cohen (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2019-10-01

Restricted:

Validated:

Yes

Current State:

Final no updates expected

pH measurements collected at the height of El Niño at Jarvis Island in 2015 and 2016

Abstract:

This dataset contains pH measurements collected at the height of El Niño on 12-15 November 2015 and after severe El Niño conditions had subsided on 16-24 May 2016 for the west and east sides of Jarvis Island at 7-10 m depth.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2019-10-01	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.775838.1	2019-11-04

Description

Methods & Sampling

Short-term oceanographic instrument deployments were conducted at the same sites on 12-15 November 2015 and 16-23 May 2016. Instrument package deployments included a SAMI-pH sensor (Sunburst Sensors, 15 min sampling interval), SBE-37 Microcat (Sea-Bird Electronics, 20 sec sampling interval), and dissolved oxygen sensor (RBR, 1 min sampling interval) which were affixed to the reef at 7 m (east) and 10 m (west) depth.

Samples were collected during expeditions aboard:

R/V Machias (12–15 November 2015)
NOAA ship Oscar Elton Sette (17–23 May 2016)

Research activities and sample collection were conducted under U.S. Fish and Wildlife Service Pacific Reefs National Wildlife Refuge Complex Research and Monitoring Special Use Permits:

12521-10001 (effective date: 15 Jan 2010; expiration date: 30 May 2010)
12521-12001 (effective date: 7 Feb 2012; expiration date: 31 Dec 2012)
12521-12005 (effective date: 29 Aug 2012; expiration date: 30 June 2014)
12521-14001 (effective date: 1 Jan 2015; expiration date: 31 Dec 2015)
12513-15001 (effective date: 11 Nov 2015; expiration date: 31 Dec 2015)

and in compliance with Presidential Proclamation 8336.

Data Processing Description

All instrument data were processed in R (version 3.0.1).

BCO-DMO processing notes:

Added ISO datetime column for interoperability purposes

Data Files

File
ph_jarvis.csv (Comma Separated Values (.csv), 129.07 KB) MD5:cc2974c7c0b5175acdbadeb4c415f0a0 Primary data file for dataset ID 775838

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1737311

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Machias_2015		2015-11-12	R/V Machias	Anne L. Cohen (Chief Scientist)	data info
SE1602-02		2016-05-11	NOAA Ship Oscar Elton Sette	Bernardo Vargas-Angel (Chief Scientist)	data info

Instruments

pH Sensor

Supplied Name:

Supplied Description:

SAMI-pH sensor (Sunburst Sensors, 15 min sampling interval)

Instrument Type

Generic Name: pH Sensor

Generic Description:

An instrument that measures the hydrogen ion activity in solutions.

The overall concentration of hydrogen ions is inversely related to its pH. The pH scale ranges from 0 to 14 and indicates whether acidic (more H+) or basic (less H+).

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
datetime_UTC	Date and time in UTC (mm/dd/yyyy hh:mm)	unitless	DateTime
Latitude	Latitude of sampling location; north = positive	decimal degrees	lat
Longitude	Longitude of sampling location; east = positive	decimal degrees	lon
Location_Label	Location (East side or West side of Jarvis)	unitless	region
pH	pH	unitless	pH
ISO_DateTime_UTC	Date/Time (UTC) ISO formatted [YYYY-mm-ddTHH:MM:SS[.xx]Z (UTC time)] - temporal precision of the dataset HH:MM	unitless	ISO_DateTime_UTC

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Dataset: pH Time Series

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