Ocean pH Modeled with Latest CMIP5 Data

Posted on behalf of and authored by Dr. Peter Urich, Managing Director of CLIMsystems Ltd.

Esri’s Silver Business Partner CLIMsystems Ltd., located in Hamilton, New Zealand, has been exhaustively researching and processing the latest ocean data from the Coupled Model Intercomparison Project Phase 5 or CMIP5 (United Nations Framework Convention on Climate Change Assessment 5th Assessment Report). The team has processed nine variables that are now available for global mapping in ArcGIS. This toolbar add-in to ArcGIS, SimCLIM for ArcGIS/Marine makes generating ensembles of ocean variables extremely quick and efficient, thereby dramatically increasing the user’s access to big climate data as nothing before. The nine biogeochemical variables available with the Marine add-in include: sea surface temperature, pH, primary production, total alkalinity, dissolved oxygen, nitrate, phosphate, iron and silicate. As part of their Map of the Week series, CLIMsystems website includes a short video of the potential evolution of ocean acidification from 1995 to 2100.

Assessment Report 5 (AR5) offers opportunities to model the marine environment and its wide range of biophysical ocean variables, improving AR4 ocean model shortcomings (Griffies et al., 2010; Mora et al., 2013). More than 40 variables are available from limited GCM runs, and processing of some biogeochemical models is now available for application through Esri ArcGIS tools and namely SimCLIM for ArcGIS/Marine. The currently available variables include sea surface temperature, net primary productivity of carbon by phytoplankton; and dissolved nitrate concentration a; dissolved oxygen concentration; pH; dissolved phosphate concentration; total alkalinity; dissolved iron concentration; and dissolved silicate concentration, all at the surface. For more information see www.climsystems.com

CLIMsystems Ltd. is working with Esri and its partners such as The Nature Conservancy on marine issues such as sea level rise, extreme sea-level rise events and inundation mapping. Check out the Map of the Week and obtain a free trial of the Marine add-in at www.climsystems.com.

Griffies, S., et al. (2010) Sampling Physical Ocean Fields in WCRP CMIP5 Simulations. CLIVAR Working Group for Ocean Model Development (WGOMD). Committee on CMIP5 Ocean Model Output.

Mora, C., Wei, C-L., Rollo, A., Amaro, T., Baco, A. R., et al. (2013) Biotic and Human Vulnerability to Projected Changes in Ocean Biogeochemistry over the 21st Century. PLoS Biol 11(10): e1001682. doi:10.1371/journal.pbio.1001682.

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