Tracking the space-time evolution of ocean acidification extremes in the California Current System and Northeast Pacific ...
Ocean acidification is punctuated by episodic extremes of low pH and saturation state with regard to aragonite (omega(A)). Here, we use a hindcast simulation from 1984 to 2019 with a high-resolution regional ocean model (ROMS-BEC) to identify and track ocean acidification extremes (OAX) in the north...
| Main Authors: | , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
ETH Zurich
2022
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.3929/ethz-b-000549160 http://hdl.handle.net/20.500.11850/556513 |
| Summary: | Ocean acidification is punctuated by episodic extremes of low pH and saturation state with regard to aragonite (omega(A)). Here, we use a hindcast simulation from 1984 to 2019 with a high-resolution regional ocean model (ROMS-BEC) to identify and track ocean acidification extremes (OAX) in the northeast Pacific and the California current system (CCS). In the first step, we identify all grid-cells whose pH and omega(A) are simultaneously below their first percentile over the analysis period (1984-2019). In the second step, we aggregate all neighboring cells with extreme conditions into three-dimensional time evolving events, permitting us to track them in a Lagrangian manner over their lifetime. We detect more than 22 thousand events that occur at least once in the upper 100 m during their lifetime, with broad distributions in terms of size, duration, volume, and intensity, and with 26% of them harboring corrosive conditions (omega(A) < 1). By clustering the OAXs, we find three types of extremes in the ... : Journal of Geophysical Research: Oceans, 127 (5) ... |
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