Our data are publicly archived at the #NOAA Ocean Carbon and Acidification Data System #OCADS. π§ͺππ¦ #OADayofAction
www.ncei.noaa.gov/products/oce...
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#OADayofAction
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Screen shot of the January 2026 eNews from the Alaska Ocean Acidification Network. Picture of a king crab.
January eNews from the Alaska #OceanAcidification Network
π§ͺππ¦ #OADayofAction
mailchi.mp/aoos/oa-indi...
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Ocean Acidification planetary boundary. (a) Percentage (%) reduction between present day and pre-industrial aragonite saturation state for the surface global ocean and the seven ocean regions, also comparing to the Richardson et al. (2023) planetary boundary assessment (blue circle and blue line). The red circles represent the multi-model ensemble median with the associated propagated errors for the multi-model ensemble standard deviation and the pre-industrial uncertainties. The 20% boundary value is presented as the dark grey lines with their associated uncertainties shown by the light grey banding. Regions are defined as: Arctic Ocean (Arctic) region north of 65Β°βN; north Pacific Ocean (Pacific-N) between 40Β°βN and 65Β°βN; north Atlantic Ocean (Atlantic-N) between 40Β°βN and 65Β°βN; central Pacific Ocean (Pacific-C) between 40Β°βS and 40Β°βN; central Atlantic Ocean (Atlantic-C) between 40Β°βS and 40Β°βN; Indian Ocean (Indian) between 40Β°βS and 25Β°βN; and the Southern Ocean (Southern) ocean south of 40Β°βS. (b) Regional assessment of ocean acidification in year 2020, relative to the boundary of 20% reduction from pre-industrial aragonite saturation state, as in (a), with grey bars representing the boundary uncertainties, and colours depicting whether that boundary has been crossed (red) or not (green). (c) Map showing the percentage difference in surface Ξ©Arag between pre-industrial (1750) and year 2020. The black contour line on the map represents a 20% reduction from pre-industrial values.
"Ocean acidification has been identified in the Planetary Boundary Framework as a process approaching a boundary that could lead to unacceptable environmental change." Findlay et al., 2025
The #Arctic region, north of 65Β°βN, has the highest % change. #OADayofAction π§ͺππ¦
doi.org/10.1111/gcb....
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Ocean Acidification Day of Action Jan. 8, OA in Canada news and resources, oceanacidification.ca
Today is #OADayofAction held each year on Jan 8 to represent the current pH of the ocean (8.1). To celebrate, we're reflecting on Canada's participation in the OA events, actions, stories, and resources of 2025 from Canada and beyond! π
www.oceanacidification.ca/post/oa-day-...
#OceanAcidification
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The Alaska #OceanAcidification Network is a one stop shop for new regional conditions, species response, recent news, and educations resources. #OADayofAction π§ͺππ¦ @aoos-alaska.bsky.social
Sign up for the eNews, it is excellent!
aoan.aoos.org
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Learn more about #OceanAcidification in Alaska with this story map. π§ͺππ¦ #OADayofAction
storymaps.arcgis.com/stories/8f14...
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#OceanAcidification is a component of the United Nations Ocean Decade @unoceandecade.bsky.social #OADayofAction π§ͺππ¦π
#OARS mission: Providing society with the evidence needed to sustainably identify, monitor, mitigate and adapt to OA; from local to global scales
oceandecade.org/actions/ocea...
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#OceanAcidification research is shared internationally through the Global OA Observing Network #GOAON @goa-on.bsky.social #OADayofAction π§ͺππ¦π
www.goa-on.org/home.php
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#NOAA #OceanAcidification Program studies impacts of changing ocean chemistry and how to adapt. π§ͺππ¦ #OADayofAction
Within the US πΊπΈ, an interagency working group brings federal agencies together for research and management of resources and ecosystems.
oceanacidification.noaa.gov
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The ocean absorbs excess human emitted COβ from the atmosphere, and through a series of reactions, decreases seawater pH in a process known as #OceanAcidification. #OADayofAction π§ͺππ¦
www.pmel.noaa.gov/co2/file/Haw...
π by #NOAA and UH MΔnoa
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International Ocean Acidification Day of Action flyer reads: Ocean Acidification is a global issue that requires local actions.
Our research observes the marine carbonate chemistry around Alaska to determine the intensity, duration, and extent of #OceanAcidification. π§ͺππ¦
The information is used by local, regional, national, and international decision makers. #OADayofAction
Learn more at aoan.aoos.org
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Learn more about #OceanAcidification around Alaska by signing up for the #Alaska OA Network eNews. π§ͺππ¦ #OADayofAction
aoan.aoos.org
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Graph showing increasing atmospheric and surface seawater carbon, as well as decreasing surface seawater pH.
Today on 8 January, the #OADayOfAction, we recognize the global surface ocean has an average pH of 8.1 - a 26% increase in acidity over the past 250 years.
#OceanAcidification occurs when the ocean absorbs excess COβ from the atmosphere, causing in a decrease in seawater pH. π§ͺππ¦
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The current pH level of the ocean is 8.1. Hence today, on 8 January, we hold our 4th #OADayOfAction. @oceanfdn and their global network remain committed as ever to fighting #OceanAcidification and finding solutions to this crisis. https://ocean-acidification.org/
#SDG14
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