{"help": "https://data.gov.au/data/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author_email": null, "contact_point": "xuebin.zhang@csiro.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "a9f57726-ea6d-4d59-a656-c3f31c758352", "isopen": false, "language": "eng", "license_id": "notspecified", "license_title": "notspecified", "maintainer": null, "maintainer_email": null, "metadata_created": "2026-01-11T05:59:54.104672", "metadata_modified": "2026-01-11T05:59:54.104680", "name": "bottom-aragonite-saturation-state1", "notes": "This resource is a map of Bottom Aragonite Saturation State and comes from from a simulation that uses the multi-model mean forcings from RCP8.5 projection to drive an ocean eddy-resolving model (OFAM3). \n\nInsights for Warming and Acidification\nIncreased frequency and duration of marine heatwaves increase the likelihood of more frequent and severe coral bleaching events.\nTasman Sea approaches a permanent marine heatwave state by GWL3. \nGreat Barrier Reef and Ningaloo Reef will experience annual conditions for extreme bleaching by GWL3. \nAcidity at GWL3: Southern Ocean surface waters south of 60S will drop below an annual mean aragonite saturation state of 1. Values above 1.0 are required to produce calcareous shells or skeletons optimally. Values below 1 are considered corrosive, and skeletons and shells may be subject to dissolution. \nThe ocean environment will become more stressful for marine organisms and ecosystems.\n\nThe references for the simulations are:\nFeng, M., Zhang, X., Oke, P., Monselesan, D., Chamberlain, M. A., Matear, R. J., & Schiller, A. (2016). Invigorating ocean boundary current systems around Australia during 19792014: As simulated in a near-global eddy-resolving ocean model. Journal Of Geophysical Research-Oceans.\nHayashida, H., Matear, R. J., & Strutton, P. G. (2020). Background nutrient concentration determines phytoplankton bloom response to marine heatwaves. Global Change Biology, 26(9), 48004811. https://doi.org/10.1111/gcb.15255\nHayashida, H., Matear, R. J., Strutton, P. G., & Zhang, X. (2020). Insights into projected changes in marine heatwaves from a high-resolution ocean circulation model. Nature Communications, 11(1), 19. https://doi.org/10.1038/s41467-020-18241-x\nMatear, R. J., Chamberlain, M. A., Sun, C., & Feng, M. (2015). Climate change projection for the western tropical Pacific Ocean using a high-resolution ocean model: Implications for tuna fisheries. Deep Sea Research Part II: Topical Studies in Oceanography, 113(0), 2246.\nMatear, R. J., Chamberlain, M. A., Sun, C., & Feng, M. (2013). Climate change projection of the Tasman Sea from an Eddy-resolving Ocean Model. Journal Of Geophysical Research-Oceans, 118(6), 29612976.\nZhang, X., Oke, P. R., Feng, M., Chamberlain, M. A., Church, J. A., Monselesan, D., et al. (2016). A near-global eddy-resolving OGCM for climate studies. Geoscientific Model Development Discussions.\nDiagnostics\nThe key ocean diagnostics are displayed according to Global Warming Levels (GWLs) using the 20 year period that define a given GWL. The key ocean diagnostics are:\n
    \n
  1. Sea Surface Temperature monthly climatology
    2. \n
  2. Surface Aragonite Saturation State monthly climatology
    3. \n
  3. Surface pH monthly climatology
    4. \n
  4. Intensity of Marine Heat Wave
    5. \n
  5. Duration of Marine Heat Wave
    6. \n
  6. NPP monthly climatology (N mol/m^2/s)
    7. \n
  7. Degree Heating Weeks (average of the annual maximum value dhw_amax, maximum (dhw_max) and minimum (dhw_max) annual value over GWL period
    8. \n
  8. Bottom Temperature
    9. \n
  9. Full ocean depth temperature (note simulation used restoring to T and S below 2000m)10. Magnitude of Bottom Stress (bmf)
    10. \n
  10. Bottom aragonite saturation state
    11. \n
\n\nData/confidence \nConfidence: high confidence in the direction of change, medium confidence in the magnitude of change and low confidence in the ecological consequence of the changes. 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