READ ME File For 'Dataset for research article: Coastal Marine Carbon and Air-Sea Fluxes Quantified from pH Sensors on an Extended AUV Deployment'
Dataset DOI: 10.5258/SOTON/D3716
Date that the file was created: September, 2025

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GENERAL INFORMATION
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ReadMe Author: Emily Hammermeister, University of Southampton, https://orcid.org/0000-0002-1739-761X

Date of data collection: 10 May, 2022 - 13 June, 2022

Information about geographic location of data collection: Collected via Autosub Long Rang (ALR) owned and operated by the National Oceanography Centre, Southampton. The vehicle was deployed an recovered from the shorelines of Plymouth, UK. 


Related projects:
OCEANIDS Project (https://noc.ac.uk/projects/oceanids) Funding: Industrial Strategy Challenge Fund / Natural Environment Research Council’s (ISCF/NERC’s) Oceanids Programme and NERC National Underpinning Autonomy Capability 

This dataset supports the publication:

AUTHORS: Emily M. Hammermeister, Cathy Wimart-Rousseau, Stathys Papadimitriou, Pablo Trucco-Pignata, Edward Chaney, Robert Templeton, Alexander B. Phillips, and Socratis Loucaides


TITLE: Coastal Marine Carbon and Air-Sea Fluxes Quantified from pH Sensors on an Extended AUV Deployment

JOURNAL: Journal of Geophysical Research: Oceans

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DATA & FILE OVERVIEW
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This dataset contains a compressed (zipped) folder entitled 'Hammermeister_et_al_data_for_repository_LDPT.zip'.
 
The zipped folder contains the following 3 csv files that support the data, figures, and analysis in this publication: 

All data files contain data collected from the Autosub Long Range (ALR) Underwater Vehicle, separated by sensor type and therefore measurement frequency. For all data, depth is in meters(m). 

1. All_ALR.csv
-This is a 2960339x13 timetable of data with headers of high frequency (1 hz) physical and biogeochemical data output from the ALR during the entire deployment. This includes timestamp, location, depth, temperature, conductivity, pressure, dissolved oxygen, etc. 

2. ALR_LOC_pH.csv
-This is a 858x20 timetable of pH data from the Lab-On-Chip sensor onboard the ALR with header "Adjusted_pH" (column 20). The pH data reports measurements every ~ 60 minutes and is time-matched to ALR output data therefore containing data that overlaps with some of "All_ALR.csv" and "ALR_SF_pH.csv".

3. ALR_SF_pH.csv
-This is a 49184x21 timetable of pH data from the SeaFET pH sensor (header name "pH",column 21) onboard the ALR. The pH data reports measurements every 60 seconds and is time-matched to ALR data output therefore containing data that overlaps with some of "All_ALR.csv" and "ALR_LOC_pH.csv"


Please direct any questions to the corresponding author Emily Hammermeister (e.m.hammermeister@soton.ac.uk)