Ocean acidification monitoring
along the Georgia coast

Scott Noakes
Center for Applied Isotope Studies
University of Georgia

Tuesday, October 10, 2017
Pacific Forum—11:00 a.m.

The Grays Reef time-series mooring is a multi-organization effort that has successfully collected high-resolution water quality data since 2006. The mooring is located in the South Atlantic Bight offshore Georgia within Gray’s Reef National Marine Sanctuary (GRNMS). Based on the surface data collected, temperature-driven seasonal partial pressure of carbon dioxide (pCO2) changes occur naturally on an annual scale. The data suggest that seawater pCO2 is increasing faster than atmospheric pCO2 indicating there are additional CO2 sources adding to the carbon budget.

To support the surface monitoring and benthic studies at GRNMS, a seafloor observatory monitoring ocean acidification was established. Given the relatively shallow depth at GRNMS, it was thought pCO2 measured on the surface could be extrapolated to the seafloor. However, seafloor pCO2 data revealed unusual episodes of subsurface pCO2-rich water that had not been previously identified. These events correspond with major storms along the coast. Additionally, freshwater plumes from rivers can push offshore during heavy rain events. These plumes can have pCO2 up to 10 times that of offshore waters adding to the carbon budget. How the increasing seawater pCO2 will affect the benthic community has yet to be determined, but it is clear that the benthic organisms have adapted to the natural seasonal fluctuations for survival.

Print Version (PDF)

Next: Kristy Kroeker

Products

Data repository
Data policy
What is happening in Monterey Bay today?
Central and Northern California Ocean Observing System
Chemical data
Ocean float data
Slough data
Mooring ISUS measurements
Southern Ocean Data
Mooring data
M1 Mooring Summary Data
M1 ADCP (CeNCOOS)
M1 Asimet
M1 Download Info
M1 EMeter
M1 Fluorometer (CeNCOOS)
Molecular and genomics data
ESP Web Portal
Seafloor mapping
Upper ocean data
Spatial Temporal Oceanographic Query System (STOQS) Data
Image gallery
Video library
Seminars
Previous seminars
David Packard Distinguished Lecturers
Research software
Video Annotation and Reference System
System Overview
Knowledgebase
Annotation Interface
Video Tape User Guide
Video File User Guide
Annotation Glossary
Query Interface
Basic User Guide
Advanced User Guide
Results
Query Glossary
FAQ
VARS Publications
Oceanographic Decision Support System
MB-System seafloor mapping software
How to Download and Install MB-System
MB-System Documentation
MB-System Announcements
MB-System Announcements (Archive)
MB-System FAQ
MB-System Discussion Lists
MB-System YouTube Tutorials
Matlab scripts: Linear regressions
Introduction to Model I and Model II linear regressions
A brief history of Model II regression analysis
Index of downloadable files
Summary of modifications
Regression rules of thumb
Results for Model I and Model II regressions
Graphs of the Model I and Model II regressions
Which regression: Model I or Model II?
Matlab scripts: Oceanographic calculations
Matlab scripts: Sound velocity
Visual Basic for Excel: Oceanographic calculations
Educational resources
MBARI Summer Internship Program
2017 Summer Interns Blog
Education and Research: Testing Hypotheses (EARTH)
EARTH workshops
2016—New Brunswick, NJ
2015—Newport, Oregon
2016 Satellite workshop—Pensacola, FL
2016 Satellite workshop—Beaufort, NC
EARTH resources
EARTH lesson plans
Lesson plans—published
Lesson plans—development
Lesson drafts—2015
Lesson drafts—2016 Pensacola
Center for Microbial Oceanography: Research and Education (C-MORE) Science Kits
Publications
Sample archive