Dr. Francis Chan's 2012-2014 Oregon Sea Grant-supported project, "Understanding, Forecasting and Communicating the Linkages Between Hypoxia and Ocean Acidification in Oregon's Coastal Ocean"
1. Understanding, Forecasting And Communicating
The Linkages Between Hypoxia And Ocean
Acidification In Oregon's Coastal Ocean
Francis Chan1,Kristen Milligan1, Jack Barth2
1Department of Zoology, Oregon State University
2College of Earth, Ocean and Atmospheric Sciences, Oregon State University
2. The Problem from 35,000 feet: Hypoxia and Ocean
Acidification are Leading Pathways of Ecosystem Changes
Changes in aragonite solubility
% oxygen change
Oschlies et al. GBC 2008 Feely et al. Oceanography 2009
3. Locally, Oregon’s coastal ocean is facing these
changes today…and they are closely connected
ocean acidification
pCO2 (μatm)
DO (ml l-1)
hypoxia
SH-70 mooring
4. 1. Where and when are hypoxia and OA
most strongly coupled?
[Are there hot spots (and refuges) where
this multi-stressor problem is most
strongly (weakly) felt?]
5. Why do we ask this?
1-biologically, OA and hypoxia stress can be interactive
2- we already see a mosaic-like
pattern of hypoxia stress
GLODAP
NE Pacific
Aragonite Solubility
Pierce
and
Barth
(in
prep)
DO (umol kg-1)
3- hypoxia and OA stress are not
perfectly coupled (*especially in the
6. 2. What forcings drive the variation in
hypoxia-OA coupling?
[What will we face in the future, and how
fast will these changes came?]
7. Why do we ask this?
1- Bigger and faster changes in the coastal ocean (?)
observed
Dore et al. 2008
ca. 20 umol
kg-1 DIC
increase
Modeled (w/wind and sourcewater)
2- Nearshore hypoxia sensitive to changes in
open ocean oxygen content and upwelling wind
Pierce et al. 2012 forcing (both climate sensitive features)
10. Some Outreach Challenges:
•Ocean acidification is causing dead zones
•OA is a remote tropical island problem
•OA and hypoxia will wipe out any benefits of
reserves
•www.Ilovecarbondioxide.com
11. Where do we want to get to collectively
•Enhance Oregon as a model system for OA-
hypoxia research (OA-hypoxia Townhalls)
•Inform the public with the best available science
(and messaging in the most effective way)
•Inform policy with the best available science