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- W2571683485 abstract "Abstract A modified version of the extended multiple linear regression (eMLR) method is used to estimate anthropogenic carbon concentration (C anth ) changes along the Pacific P02 and P16 hydrographic sections over the past two decades. P02 is a zonal section crossing the North Pacific at 30°N, and P16 is a meridional section crossing the North and South Pacific at ~150°W. The eMLR modifications allow the uncertainties associated with choices of regression parameters to be both resolved and reduced. C anth is found to have increased throughout the water column from the surface to ~1000 m depth along both lines in both decades. Mean column C anth inventory increased consistently during the earlier (1990s–2000s) and recent (2000s–2010s) decades along P02, at rates of 0.53 ± 0.11 and 0.46 ± 0.11 mol C m −2 a −1 , respectively. By contrast, C anth storage accelerated from 0.29 ± 0.10 to 0.45 ± 0.11 mol C m −2 a −1 along P16. Shifts in water mass distributions are ruled out as a potential cause of this increase, which is instead attributed to recent increases in the ventilation of the South Pacific Subtropical Cell. Decadal changes along P16 are extrapolated across the gyre to estimate a Pacific Basin average storage between 60°S and 60°N of 6.1 ± 1.5 PgC decade −1 in the earlier decade and 8.8 ± 2.2 PgC decade −1 in the recent decade. This storage estimate is large despite the shallow Pacific C anth penetration due to the large volume of the Pacific Ocean. By 2014, C anth storage had changed Pacific surface seawater pH by −0.08 to −0.14 and aragonite saturation state by −0.57 to −0.82." @default.
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- W2571683485 date "2017-02-01" @default.
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- W2571683485 title "Two decades of Pacific anthropogenic carbon storage and ocean acidification along Global Ocean Ship-based Hydrographic Investigations Program sections P16 and P02" @default.
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- W2571683485 doi "https://doi.org/10.1002/2016gb005485" @default.
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