global coupled carbon cycle-climate model
Abstract. Ocean acidification from the uptake of anthro-pogenic carbon is simulated for the industrial period and IPCC SRES emission scenarios A2 and B1 with a global cou-pled carbon cycle-climate model. Earlier studies identified seawater saturation state with respect to aragonite, a mineral phase...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.456.4205 http://pal.lternet.edu/docs/bibliography/Public/369lterc.pdf |
| Summary: | Abstract. Ocean acidification from the uptake of anthro-pogenic carbon is simulated for the industrial period and IPCC SRES emission scenarios A2 and B1 with a global cou-pled carbon cycle-climate model. Earlier studies identified seawater saturation state with respect to aragonite, a mineral phase of calcium carbonate, as a key variable governing im-pacts on corals and other shell-forming organisms. Glob-ally in the A2 scenario, water saturated by more than 300%, considered suitable for coral growth, vanishes by 2070 AD (CO2≈630 ppm), and the ocean volume fraction occupied by saturated water decreases from 42 % to 25 % over this cen-tury. The largest simulated pH changes worldwide occur in Arctic surface waters, where hydrogen ion concentration increases by up to 185 % (1pH=−0.45). Projected climate change amplifies the decrease in Arctic surface mean satura- |
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